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Computed Tomography by Bushong, Stewart C
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1Effects Of A Radiation Dose Reduction Strategy For Computed Tomography In Severely Injured Trauma Patients In The Emergency Department: An Observational Study.
By Kim, Soo Hyun, Jung, Seung Eun, Oh, Sang Hoon, Park, Kyu Nam and Youn, Chun Song
This article is from Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine , volume 19 . Abstract Background: Severely injured trauma patients are exposed to clinically significant radiation doses from computed tomography (CT) imaging in the emergency department. Moreover, this radiation exposure is associated with an increased risk of cancer. The purpose of this study was to determine some effects of a radiation dose reduction strategy for CT in severely injured trauma patients in the emergency department. Methods: We implemented the radiation dose reduction strategy in May 2009. A prospective observational study design was used to collect data from patients who met the inclusion criteria during this one year study (intervention group) from May 2009 to April 2010. The prospective data were compared with data collected retrospectively for one year prior to the implementation of the radiation dose reduction strategy (control group). By comparison of the cumulative effective dose and the number of CT examinations in the two groups, we evaluated effects of a radiation dose reduction strategy. All the patients met the institutional adult trauma team activation criteria. The radiation doses calculated by the CT scanner were converted to effective doses by multiplication by a conversion coefficient. Results: A total of 118 patients were included in this study. Among them, 33 were admitted before May 2009 (control group), and 85 were admitted after May 2009 (intervention group). There were no significant differences between the two groups regarding baseline characteristics, such as injury severity and mortality. Additionally, there was no difference between the two groups in the mean number of total CT examinations per patient (4.8 vs. 4.5, respectively; p = 0.227). However, the mean effective dose of the total CT examinations per patient significantly decreased from 78.71 mSv to 29.50 mSv (p < 0.001). Conclusions: The radiation dose reduction strategy for CT in severely injured trauma patients effectively decreased the cumulative effective dose of the total CT examinations in the emergency department. But not effectively decreased the number of CT examinations.
“Effects Of A Radiation Dose Reduction Strategy For Computed Tomography In Severely Injured Trauma Patients In The Emergency Department: An Observational Study.” Metadata:
- Title: ➤ Effects Of A Radiation Dose Reduction Strategy For Computed Tomography In Severely Injured Trauma Patients In The Emergency Department: An Observational Study.
- Authors: Kim, Soo HyunJung, Seung EunOh, Sang HoonPark, Kyu NamYoun, Chun Song
- Language: English
Edition Identifiers:
- Internet Archive ID: pubmed-PMC3231876
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2Artifacts In Cone-Beam Computed Tomography Of A Post And Core Restoration: A Case Report.
By Parirokh, Masoud, Ardjomand, Karim and Manochehrifar, Hamed
This article is from Iranian Endodontic Journal , volume 7 . Abstract Cone-beam computed tomography (CBCT) has been accepted as a useful tool for diagnosis and treatment in endodontics. Despite a growing trend toward using CBCT in endodontic practice the CBCT images should be interpreted carefully. This case report presents a case that showed radiolucency inside and around a tooth which was free of pathologic changes under a dental operative microscope and conventional radiographs. A male patient was referred to an endodontic office for evaluation of radiolucency inside and around tooth #21 in his CBCT images. The post and crown over the tooth was removed and the tooth was observed under a dental operative microscope. Clinical examination as well as direct observation under a dental operative microscope showed no pathological lesions inside and around the tooth. The misdiagnosis was based on an artifact on CBCT. Despite the advantages of CBCT images as a great radiographic aid in endodontic practice, in the presence of metallic structures such as post and core the images should be interpreted with caution.
“Artifacts In Cone-Beam Computed Tomography Of A Post And Core Restoration: A Case Report.” Metadata:
- Title: ➤ Artifacts In Cone-Beam Computed Tomography Of A Post And Core Restoration: A Case Report.
- Authors: Parirokh, MasoudArdjomand, KarimManochehrifar, Hamed
- Language: English
Edition Identifiers:
- Internet Archive ID: pubmed-PMC3467128
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3DTIC ADA470992: Design, Implementation, And Characterization Of A Dedicated Breast Computed Mammo Tomography System For Enhanced Lesion Imaging
By Defense Technical Information Center
The overall goal of this work is to design implement and characterize a novel dedicated mammotomography system for enhanced lesion detection. This novel system will allow fully 3-D imaging of a pendant uncompressed breast using novel 3-D complex orbit capabilities. The system has been characterized in terms of dose efficiency and contrast sensitivity indicating the potential for sub-dual-view-dose imaging. The 2D and 3D MTFs have been determined. Observer studies have been performed to determine the lower limits of detectibility and a comparison with dual view mammography indicates mammotomography can detect significantly smaller lesions in the presence of overlying structure. Patient bed optimization has also been investigated and a prototype patient bed designed and tilt angles evaluated for optimization of chest wall imaging and patient comfort. Future studies for the remaining phase (Year 3) of project will focus on feasibility of vertical patient bed motion and evaluation of breast sizes.
“DTIC ADA470992: Design, Implementation, And Characterization Of A Dedicated Breast Computed Mammo Tomography System For Enhanced Lesion Imaging” Metadata:
- Title: ➤ DTIC ADA470992: Design, Implementation, And Characterization Of A Dedicated Breast Computed Mammo Tomography System For Enhanced Lesion Imaging
- Author: ➤ Defense Technical Information Center
- Language: English
“DTIC ADA470992: Design, Implementation, And Characterization Of A Dedicated Breast Computed Mammo Tomography System For Enhanced Lesion Imaging” Subjects and Themes:
- Subjects: ➤ DTIC Archive - McKinley, Randolph L - DUKE UNIV DURHAM NC - *COMPUTERIZED TOMOGRAPHY - *BREAST CANCER - OBSERVERS - DETECTION - MOTION - EFFICIENCY - PROTOTYPES - SENSITIVITY - LIMITATIONS - LESIONS - MAMMOGRAPHY - BEDDING - MAMMARY GLANDS - IMAGES - DOSAGE - LOW LEVEL - WALLS - PATIENTS - THORAX - TILT
Edition Identifiers:
- Internet Archive ID: DTIC_ADA470992
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4Cone Beam Computed Tomography : From Capture To Reporting
The overall goal of this work is to design implement and characterize a novel dedicated mammotomography system for enhanced lesion detection. This novel system will allow fully 3-D imaging of a pendant uncompressed breast using novel 3-D complex orbit capabilities. The system has been characterized in terms of dose efficiency and contrast sensitivity indicating the potential for sub-dual-view-dose imaging. The 2D and 3D MTFs have been determined. Observer studies have been performed to determine the lower limits of detectibility and a comparison with dual view mammography indicates mammotomography can detect significantly smaller lesions in the presence of overlying structure. Patient bed optimization has also been investigated and a prototype patient bed designed and tilt angles evaluated for optimization of chest wall imaging and patient comfort. Future studies for the remaining phase (Year 3) of project will focus on feasibility of vertical patient bed motion and evaluation of breast sizes.
“Cone Beam Computed Tomography : From Capture To Reporting” Metadata:
- Title: ➤ Cone Beam Computed Tomography : From Capture To Reporting
- Language: English
“Cone Beam Computed Tomography : From Capture To Reporting” Subjects and Themes:
- Subjects: Tomography - Mouth -- Tomography - Jaws -- Tomography - Cone-Beam Computed Tomography - Radiography, Dental -- methods
Edition Identifiers:
- Internet Archive ID: conebeamcomputed0000unse
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5Spatially-Adaptive Reconstruction In Computed Tomography Based On Statistical Learning
By Joseph Shtok, Michael Zibulevsky and Michael Elad
We propose a direct reconstruction algorithm for Computed Tomography, based on a local fusion of a few preliminary image estimates by means of a non-linear fusion rule. One such rule is based on a signal denoising technique which is spatially adaptive to the unknown local smoothness. Another, more powerful fusion rule, is based on a neural network trained off-line with a high-quality training set of images. Two types of linear reconstruction algorithms for the preliminary images are employed for two different reconstruction tasks. For an entire image reconstruction from full projection data, the proposed scheme uses a sequence of Filtered Back-Projection algorithms with a gradually growing cut-off frequency. To recover a Region Of Interest only from local projections, statistically-trained linear reconstruction algorithms are employed. Numerical experiments display the improvement in reconstruction quality when compared to linear reconstruction algorithms.
“Spatially-Adaptive Reconstruction In Computed Tomography Based On Statistical Learning” Metadata:
- Title: ➤ Spatially-Adaptive Reconstruction In Computed Tomography Based On Statistical Learning
- Authors: Joseph ShtokMichael ZibulevskyMichael Elad
- Language: English
Edition Identifiers:
- Internet Archive ID: arxiv-1004.4373
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6Anomalous Scaling Law For Noise Variance And Spatial Resolution In Differential Phase Contrast Computed Tomography
By Guang-Hong Chen, Joseph Zambelli, Zhihua Qi and Nicholas Bevins
In conventional absorption based x-ray computed tomography (CT), the noise variance in reconstructed CT images scales with spatial resolution following an inverse cubic relationship. Without reconstruction, in x-ray absorption radiography, the noise variance scales as an inverse square with spatial resolution. In this letter we report that while the inverse square relationship holds for differential phase contrast projection imaging, there exists an anomalous scaling law in differential phase contrast CT, where the noise variance scales with spatial resolution following an inverse linear relationship. The anomalous scaling law is theoretically derived and subsequently validated with phantom results from an experimental Talbot-Lau interferometer system.
“Anomalous Scaling Law For Noise Variance And Spatial Resolution In Differential Phase Contrast Computed Tomography” Metadata:
- Title: ➤ Anomalous Scaling Law For Noise Variance And Spatial Resolution In Differential Phase Contrast Computed Tomography
- Authors: Guang-Hong ChenJoseph ZambelliZhihua QiNicholas Bevins
- Language: English
Edition Identifiers:
- Internet Archive ID: arxiv-1006.0967
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7Development Of A Proton Computed Tomography Detector System
By Md. Naimuddin, G. Coutrakon, G. Blazey, S. Boi, A. Dyshkant, B. Erdelyi, D. Hedin, E. Johnson, J. Krider, V. Rukalin, S. A. Uzunyan, V. Zutshi, R. Fordt, G. Sellberg, J. E. Rauch, M. Roman, P. Rubinov and P. Wilson
Computer tomography is one of the most promising new methods to image abnormal tissues inside the human body. Tomography is also used to position the patient accurately before radiation therapy. Hadron therapy for treating cancer has become one of the most advantageous and safe options. In order to fully utilize the advantages of hadron therapy, there is a necessity of performing radiography with hadrons as well. In this paper we present the development of a proton computed tomography system. Our second-generation proton tomography system consists of two upstream and two downstream trackers made up of fibers as active material and a range detector consisting of plastic scintillators. We present details of the detector system, readout electronics, and data acquisition system as well as the commissioning of the entire system. We also present preliminary results from the test beam of the range detector.
“Development Of A Proton Computed Tomography Detector System” Metadata:
- Title: ➤ Development Of A Proton Computed Tomography Detector System
- Authors: ➤ Md. NaimuddinG. CoutrakonG. BlazeyS. BoiA. DyshkantB. ErdelyiD. HedinE. JohnsonJ. KriderV. RukalinS. A. UzunyanV. ZutshiR. FordtG. SellbergJ. E. RauchM. RomanP. RubinovP. Wilson
“Development Of A Proton Computed Tomography Detector System” Subjects and Themes:
- Subjects: Instrumentation and Detectors - Medical Physics - Physics
Edition Identifiers:
- Internet Archive ID: arxiv-1510.00130
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8Possibilities Of Computed Tomography And Magnetic Resonance Urography As Modern Techniques In The Diagnosis Of Volumetric Ureteral Processes
By Sokhibova Ziyoda Rakhmonovnam, Akhmadova Maftuna Amin Kizi
Urothelial cancer is the 4th most common malignant tumor after prostate (or breast), lung and colorectal cancer. Transitional cell carcinomas of the upper urinary tract (UTC) are less common than those of the bladder, but 60% are diagnosed as early as stage III. Risk factors include tobacco smoking and professional activities (employment in the paint and varnish, chemical, oil industries). In addition, the ureters are secondarily involved in the volumetric processes of the abdominal cavity and especially the small pelvis. All patients underwent a comprehensive X-ray examination: ES was initially performed in 64.8% (n = 92), ultrasound in 67.6% (n = 96). All patients then underwent CTU and/or MRU.
“Possibilities Of Computed Tomography And Magnetic Resonance Urography As Modern Techniques In The Diagnosis Of Volumetric Ureteral Processes” Metadata:
- Title: ➤ Possibilities Of Computed Tomography And Magnetic Resonance Urography As Modern Techniques In The Diagnosis Of Volumetric Ureteral Processes
- Author: ➤ Sokhibova Ziyoda Rakhmonovnam, Akhmadova Maftuna Amin Kizi
“Possibilities Of Computed Tomography And Magnetic Resonance Urography As Modern Techniques In The Diagnosis Of Volumetric Ureteral Processes” Subjects and Themes:
- Subjects: Urothelial cancer - abdominal cavity
Edition Identifiers:
- Internet Archive ID: ➤ httpscajmns.centralasianstudies.orgindex.phpcajmnsarticleview802
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9Role Of Computed Tomography Angiography In Detecting Pulmonary Embolism And The Prevalence Of It
By Medical Science (Journal)
Background: Pulmonary embolism (PE) is an obstruction of the principal pulmonary artery, or one of its parts, by a material that has passed into the bloodstream from elsewhere in the body.
“Role Of Computed Tomography Angiography In Detecting Pulmonary Embolism And The Prevalence Of It” Metadata:
- Title: ➤ Role Of Computed Tomography Angiography In Detecting Pulmonary Embolism And The Prevalence Of It
- Author: Medical Science (Journal)
- Language: English
“Role Of Computed Tomography Angiography In Detecting Pulmonary Embolism And The Prevalence Of It” Subjects and Themes:
- Subjects: PE - Prevalence - CTA
Edition Identifiers:
- Internet Archive ID: ➤ httpsdiscoveryjournals.orgmedicalsciencecurrent_issuev25n109a26.pdf
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10Cosmic Ray Muon Computed Tomography Of Spent Nuclear Fuel In Dry Storage Casks
By D. Poulson, J. M. Durham, E. Guardincerri, C. L. Morris, J. D. Bacon, K. Plaud-Ramos, D. Morley and A. Hecht
Radiography with cosmic ray muon scattering has proven to be a successful method of imaging nuclear material through heavy shielding. Of particular interest is monitoring dry storage casks for diversion of plutonium contained in spent reactor fuel. Using muon tracking detectors that surround a cylindrical cask, cosmic ray muon scattering can be simultaneously measured from all azimuthal angles, giving complete tomographic coverage of the cask interior. This paper describes the first application of filtered back projection algorithms, typically used in medical imaging, to cosmic ray muon imaging. The specific application to monitoring spent nuclear fuel in dry storage casks is investigated via GEANT4 simulations. With a cylindrical muon tracking detector surrounding a typical spent fuel cask, the cask contents can be confirmed with high confidence in less than two days exposure. Similar results can be obtained by moving a smaller detector to view the cask from multiple angles.
“Cosmic Ray Muon Computed Tomography Of Spent Nuclear Fuel In Dry Storage Casks” Metadata:
- Title: ➤ Cosmic Ray Muon Computed Tomography Of Spent Nuclear Fuel In Dry Storage Casks
- Authors: ➤ D. PoulsonJ. M. DurhamE. GuardincerriC. L. MorrisJ. D. BaconK. Plaud-RamosD. MorleyA. Hecht
“Cosmic Ray Muon Computed Tomography Of Spent Nuclear Fuel In Dry Storage Casks” Subjects and Themes:
- Subjects: Physics - Instrumentation and Detectors
Edition Identifiers:
- Internet Archive ID: arxiv-1604.08938
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11Is There A Misuse Of Brain Computed Tomography In Children? A Retrospective Record-based Study In Al Kharj
By Medical Science (Journal)
The aim of this study was to examine and document all brain CT examinations performed in 2022 at King Khalid Hospital in Al-Kharj, Saudi Arabia, along with the results of those examinations, which were based on the reasons for the scan.
“Is There A Misuse Of Brain Computed Tomography In Children? A Retrospective Record-based Study In Al Kharj” Metadata:
- Title: ➤ Is There A Misuse Of Brain Computed Tomography In Children? A Retrospective Record-based Study In Al Kharj
- Author: Medical Science (Journal)
- Language: English
“Is There A Misuse Of Brain Computed Tomography In Children? A Retrospective Record-based Study In Al Kharj” Subjects and Themes:
Edition Identifiers:
- Internet Archive ID: ➤ httpsdiscoveryjournals.orgmedicalsciencecurrent_issuev26n130ms569e2669.pdf
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12Baseline New Bone Formation Does Not Predict Bone Loss In Ankylosing Spondylitis As Assessed By Quantitative Computed Tomography (QCT) - 10-year Follow-up.
By Korkosz, Mariusz, Gasowski, Jerzy, Grzanka, Piotr, Gorczowski, Janusz, Pluskiewicz, Wojciech, Jeka, Slawomir and Grodzicki, Tomasz
This article is from BMC Musculoskeletal Disorders , volume 12 . Abstract Background: To evaluate the relationship between bone loss and new bone formation in ankylosing spondylitis (AS) using 10-year X-ray, dual-energy x-ray absorptiometry (DXA) and quantitative computed tomography (QCT) follow-up. Methods: Fifteen AS patients free from medical conditions and drugs affecting bone metabolism underwent X-ray, DXA and QCT in 1999 and 2009. Results: In spine QCT a statistically significant (p = 0,001) decrease of trabecular bone mineral content (BMC) was observed (change ± SD: 18.0 ± 7.3 mg/cm3). In contrast, spine DXA revealed a significant increase of bone mineral density (change ± SD: -0.15 ± 0.14 g/cm2). The mean BMC, both at baseline and follow-up was significantly lower (p = 0.02 and p = 0.005, respectively) in advanced radiological group as compared to early radiological group. However, in multiple regression model after adjustment for baseline BMC, the baseline radiological scoring did not influence the progression of bone loss as assessed with QCT (p = 0.22, p for BMC*X-ray syndesmophyte scoring interaction = 0.65, p for ANOVA-based X-ray syndesmophyte scoring*time interaction = 0.39). Baseline BMC was the only significant determinant of 10-year BMC change, to date the longest QCT follow-up data in AS. Conclusions: In AS patients who were not using antiosteoporotic therapy spine trabecular bone density evaluated by QCT decreased over 10-year follow-up and was not related to baseline radiological severity of spine involvement.
“Baseline New Bone Formation Does Not Predict Bone Loss In Ankylosing Spondylitis As Assessed By Quantitative Computed Tomography (QCT) - 10-year Follow-up.” Metadata:
- Title: ➤ Baseline New Bone Formation Does Not Predict Bone Loss In Ankylosing Spondylitis As Assessed By Quantitative Computed Tomography (QCT) - 10-year Follow-up.
- Authors: ➤ Korkosz, MariuszGasowski, JerzyGrzanka, PiotrGorczowski, JanuszPluskiewicz, WojciechJeka, SlawomirGrodzicki, Tomasz
- Language: English
Edition Identifiers:
- Internet Archive ID: pubmed-PMC3118153
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13Evaluation Of Blunt Pancreatic Injury With Contrast-enhanced Ultrasonography In Comparison With Contrast-enhanced Computed Tomography.
By SONG, QING, TANG, JIE, LV, FA-QIN, ZHANG, YAN, JIAO, ZI-YU, LIU, QIANG and LUO, YU-KUN
This article is from Experimental and Therapeutic Medicine , volume 5 . Abstract The aim of the present study was to evaluate acute blunt pancreatic injury using contrast-enhanced ultrasonography (CEUS) in comparison with contrast-enhanced computed tomography (CECT). Superficial and deep lesions were established by blunt pancreatic injury in 40 Chinese Guangxi Bama miniature pigs. Conventional ultrasound (US), CEUS and CECT were performed to detect traumatic lesions in the pancreas. A total of 40 lesions were established, including 20 deep lesions and 20 superficial lesions. US identified 21 of the 40 lesions, including 7 of the 20 superficial and 14 of the 20 deep lesions. CEUS identified 34 of the 40 lesions, including 14 of the 20 superficial and 20 of the 20 deep lesions. CECT identified 33 of the 40 lesions, including 13 of the 20 superficial and 20 of the 20 deep lesions. The detection rate of acute blunt pancreatic injury using CEUS was significantly higher compared with that using US (85 vs. 52.5%, P 0.05). CEUS improves the diagnostic levels of conventional US and is comparable with CECT scans in the diagnosis of blunt pancreatic injury.
“Evaluation Of Blunt Pancreatic Injury With Contrast-enhanced Ultrasonography In Comparison With Contrast-enhanced Computed Tomography.” Metadata:
- Title: ➤ Evaluation Of Blunt Pancreatic Injury With Contrast-enhanced Ultrasonography In Comparison With Contrast-enhanced Computed Tomography.
- Authors: ➤ SONG, QINGTANG, JIELV, FA-QINZHANG, YANJIAO, ZI-YULIU, QIANGLUO, YU-KUN
- Language: English
Edition Identifiers:
- Internet Archive ID: pubmed-PMC3671898
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14Prostate Cancer With Lytic Bone Metastases: 18F-fluorodeoxyglucose Positron Emission Tomography-computed Tomography For Diagnosis And Monitoring Response To Medical Castration Therapy.
By Sharma, Punit, Karunanithi, Sellam, Singh Dhull, Varun, Jain, Sachin, Bal, Chandrasekhar and Kumar, Rakesh
This article is from Indian Journal of Nuclear Medicine : IJNM : The Official Journal of the Society of Nuclear Medicine, India , volume 28 . Abstract Lytic bone metastases are rare in prostate cancer. We here present 18 fluorine fluorodeoxyglucose (18F-FDG) positron emission tomography computed tomography (PET-CT) images of a 67-year-old male patient with lytic metastases from prostate cancer. Repeat 18F-FDG PET-CT done 6 months later showed response to medical castration therapy. While the role of 18F-FDG PET-CT for sclerotic bone metastases in prostate cancer remains controversial, it appears to be useful for detection and response assessment of lytic prostate cancer metastases.
“Prostate Cancer With Lytic Bone Metastases: 18F-fluorodeoxyglucose Positron Emission Tomography-computed Tomography For Diagnosis And Monitoring Response To Medical Castration Therapy.” Metadata:
- Title: ➤ Prostate Cancer With Lytic Bone Metastases: 18F-fluorodeoxyglucose Positron Emission Tomography-computed Tomography For Diagnosis And Monitoring Response To Medical Castration Therapy.
- Authors: ➤ Sharma, PunitKarunanithi, SellamSingh Dhull, VarunJain, SachinBal, ChandrasekharKumar, Rakesh
- Language: English
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- Internet Archive ID: pubmed-PMC3822421
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15NASA Technical Reports Server (NTRS) 20090001894: Applications Of Computed Tomography To Evaluate Cellular Solid Interfaces
By NASA Technical Reports Server (NTRS)
The major morphological features - foam cells, voids, knit lines, and the bondline interface were evaluated. The features identified by micro-CT correlate well to those observed by SEM. 3D reconstructions yielded volumetric dimensions for large voids (max ~ 30 mm). Internal voids and groupings of smaller cells at the bondline are concluded to be the cause of the indications noted during the NDE prescreening process.
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- Title: ➤ NASA Technical Reports Server (NTRS) 20090001894: Applications Of Computed Tomography To Evaluate Cellular Solid Interfaces
- Author: ➤ NASA Technical Reports Server (NTRS)
- Language: English
“NASA Technical Reports Server (NTRS) 20090001894: Applications Of Computed Tomography To Evaluate Cellular Solid Interfaces” Subjects and Themes:
- Subjects: ➤ NASA Technical Reports Server (NTRS) - SOLID SURFACES - TOMOGRAPHY - NONDESTRUCTIVE TESTS - RADIOGRAPHY - MECHANICAL ENGINEERING - FOAMS - EDGE DETECTION - SCANNING ELECTRON MICROSCOPY - BACKSCATTERING - Maisano, Josephine - Marse, Daryl J. - Schilling, Paul J.
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- Internet Archive ID: NASA_NTRS_Archive_20090001894
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16Cerebral Computed Tomography : A Text Atlas
By Weisberg, Leon A., 1941-
The major morphological features - foam cells, voids, knit lines, and the bondline interface were evaluated. The features identified by micro-CT correlate well to those observed by SEM. 3D reconstructions yielded volumetric dimensions for large voids (max ~ 30 mm). Internal voids and groupings of smaller cells at the bondline are concluded to be the cause of the indications noted during the NDE prescreening process.
“Cerebral Computed Tomography : A Text Atlas” Metadata:
- Title: ➤ Cerebral Computed Tomography : A Text Atlas
- Author: Weisberg, Leon A., 1941-
- Language: English
“Cerebral Computed Tomography : A Text Atlas” Subjects and Themes:
- Subjects: ➤ Man Brain Diagnosis Tomography Applications of computer systems - Tomography, X-Ray Computed - Brain -- Diseases -- Diagnosis - Brain -- Tomography - Cerveau -- Maladies -- Diagnostic - Cerveau -- Tomographie - Système nerveux -- Maladies -- Diagnostic - Cerveau -- Radiographie - Radiography - Brain -- diagnostic imaging
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- Internet Archive ID: cerebralcomputed0000weis
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17Computed Tomography And Magnetic Resonance Imaging Of The Whole Body
The major morphological features - foam cells, voids, knit lines, and the bondline interface were evaluated. The features identified by micro-CT correlate well to those observed by SEM. 3D reconstructions yielded volumetric dimensions for large voids (max ~ 30 mm). Internal voids and groupings of smaller cells at the bondline are concluded to be the cause of the indications noted during the NDE prescreening process.
“Computed Tomography And Magnetic Resonance Imaging Of The Whole Body” Metadata:
- Title: ➤ Computed Tomography And Magnetic Resonance Imaging Of The Whole Body
- Language: English
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- Internet Archive ID: computedtomograp0001unse
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18Efficacy Of 18F-fluorodeoxyglucose Positron Emission Tomography/computed Tomography In Evaluating Lung Cancer Recurrence.
By Asai, Nobuhiro, Ohkuni, Yoshihiro, Shoji, Kazufusa and Kaneko, Norihiro
This article is from Jornal Brasileiro de Pneumologia : Publicaça̋o Oficial da Sociedade Brasileira de Pneumologia e Tisilogia , volume 39 . Abstract None
“Efficacy Of 18F-fluorodeoxyglucose Positron Emission Tomography/computed Tomography In Evaluating Lung Cancer Recurrence.” Metadata:
- Title: ➤ Efficacy Of 18F-fluorodeoxyglucose Positron Emission Tomography/computed Tomography In Evaluating Lung Cancer Recurrence.
- Authors: Asai, NobuhiroOhkuni, YoshihiroShoji, KazufusaKaneko, Norihiro
- Language: English
Edition Identifiers:
- Internet Archive ID: pubmed-PMC4075821
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19Cone-Beam Computed Tomography Evaluation Of Maxillary First And Second Molars In Iranian Population: A Morphological Study.
By Rouhani, Armita, Bagherpour, Ali, Akbari, Majid, Azizi, Majid, Nejat, Amirhosein and Naghavi, Neda
This article is from Iranian Endodontic Journal , volume 9 . Abstract Introduction: The aim of this in vitro study was to identify the root and canal morphology of maxillary first and second molars in Iranian population by taking and analyzing cone-beam computed tomography (CBCT) scans. Methods and Materials: Extracted maxillary first (n=125) and second (n=125) molars were collected from native Iranians and scanned by using a CBCT scanner. The number of roots and configuration of root canal system were classified according to Vertucci’s classification. Results: Two (1.6%) maxillary first and two (1.6%) maxillary second molars had four roots. Prevalence of root fusion was 2.4% and 8.8% in maxillary first and second molars, respectively. The most common canal morphology in the mesiobuccal roots of three-rooted first and second molars was type I (46.4% and 80.8%, respectively), followed by type VI (17.6%) in first molars. The predominant morphology of distobuccal and palatal roots in first and second molars was type I. Additional canal types were also identified. Conclusion: Profound knowledge of anatomic variations is necessary prior to cleaning and obturation of the root canal system. The most common discovered root morphology was three separate roots in both tooth types. The greatest variation in canal anatomy was discovered in the MB canals of both the first and second molars.
“Cone-Beam Computed Tomography Evaluation Of Maxillary First And Second Molars In Iranian Population: A Morphological Study.” Metadata:
- Title: ➤ Cone-Beam Computed Tomography Evaluation Of Maxillary First And Second Molars In Iranian Population: A Morphological Study.
- Authors: ➤ Rouhani, ArmitaBagherpour, AliAkbari, MajidAzizi, MajidNejat, AmirhoseinNaghavi, Neda
- Language: English
Edition Identifiers:
- Internet Archive ID: pubmed-PMC4099950
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20Perinatal And Infant Brain Imaging : Role Of Ultrasound And Computed Tomography
By Rumack, Carol M
This article is from Iranian Endodontic Journal , volume 9 . Abstract Introduction: The aim of this in vitro study was to identify the root and canal morphology of maxillary first and second molars in Iranian population by taking and analyzing cone-beam computed tomography (CBCT) scans. Methods and Materials: Extracted maxillary first (n=125) and second (n=125) molars were collected from native Iranians and scanned by using a CBCT scanner. The number of roots and configuration of root canal system were classified according to Vertucci’s classification. Results: Two (1.6%) maxillary first and two (1.6%) maxillary second molars had four roots. Prevalence of root fusion was 2.4% and 8.8% in maxillary first and second molars, respectively. The most common canal morphology in the mesiobuccal roots of three-rooted first and second molars was type I (46.4% and 80.8%, respectively), followed by type VI (17.6%) in first molars. The predominant morphology of distobuccal and palatal roots in first and second molars was type I. Additional canal types were also identified. Conclusion: Profound knowledge of anatomic variations is necessary prior to cleaning and obturation of the root canal system. The most common discovered root morphology was three separate roots in both tooth types. The greatest variation in canal anatomy was discovered in the MB canals of both the first and second molars.
“Perinatal And Infant Brain Imaging : Role Of Ultrasound And Computed Tomography” Metadata:
- Title: ➤ Perinatal And Infant Brain Imaging : Role Of Ultrasound And Computed Tomography
- Author: Rumack, Carol M
- Language: English
“Perinatal And Infant Brain Imaging : Role Of Ultrasound And Computed Tomography” Subjects and Themes:
- Subjects: ➤ Brain -- Diseases -- Diagnosis - Brain -- Abnormalities -- Diagnosis - Fetus -- Diseases -- Diagnosis - Newborn infants -- Diseases -- Diagnosis - Infants -- Diseases -- Diagnosis - Ultrasonics in obstetrics - Diagnostic ultrasonic imaging - Tomography - Brain -- diagnostic imaging - Brain Diseases -- Child - Infant, Newborn, Diseases -- diagnosis - Tomography, X-Ray Computed -- Child - Ultrasonography
Edition Identifiers:
- Internet Archive ID: bwb_0-8151-7458-6
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21The Sinonasal Communication In The Horse: Examinations Using Computerized Three-dimensional Reformatted Renderings Of Computed-tomography Datasets.
By Brinkschulte, Markus, Bienert-Zeit, Astrid, Lupke, Matthias, Hellige, Maren, Ohnesorge, Bernhard and Staszyk, Carsten
This article is from BMC Veterinary Research , volume 10 . Abstract Background: Sinusitis is a common disease in the horse. In human medicine it is described, that obstruction of the sinonasal communication plays a major role in the development of sinusitis. To get spatial sense of the equine specific communication ways between the nasal cavity and the paranasal sinuses, heads of 19 horses, aged 2 to 26 years, were analyzed using three-dimensional (3D) reformatted renderings of CT-datasets. Three-dimensional models were generated following manual and semi-automated segmentation. Before segmentation, the two-dimensional (2D) CT-images were verified against corresponding frozen sections of cadaveric heads. Results: Three-dimensional analysis of the paranasal sinuses showed the bilateral existence of seven sinus compartments: rostral maxillary sinus, ventral conchal sinus, caudal maxillary sinus, dorsal conchal sinus, frontal sinus, sphenopalatine sinus and middle conchal sinus. The maxillary septum divides these seven compartments into two sinus systems: a rostral paranasal sinus system composed of the rostral maxillary sinus and the ventral conchal sinus and a caudal paranasal sinus system which comprises all other sinuses. The generated 3D models revealed a typically configuration of the sinonasal communication ways. The sinonasal communication started within the middle nasal meatus at the nasomaxillary aperture (Apertura nasomaxillaris), which opens in a common sinonasal channel (Canalis sinunasalis communis). This common sinonasal channel ramifies into a rostral sinonasal channel (Canalis sinunasalis rostralis) and a caudo-lateral sinonasal channel (Canalis sinunasalis caudalis). The rostral sinonasal channel ventilated the rostral paranasal sinus system, the caudo-lateral sinonasal channel opened into the caudal paranasal sinus system. The rostral sinonasal channel was connected to the rostral paranasal sinuses in various ways. Whereas, the caudal channel showed less anatomical variations and was in all cases connected to the caudal maxillary sinus. Volumetric measurements of the sinonasal channels showed no statistically significant differences (P
“The Sinonasal Communication In The Horse: Examinations Using Computerized Three-dimensional Reformatted Renderings Of Computed-tomography Datasets.” Metadata:
- Title: ➤ The Sinonasal Communication In The Horse: Examinations Using Computerized Three-dimensional Reformatted Renderings Of Computed-tomography Datasets.
- Authors: ➤ Brinkschulte, MarkusBienert-Zeit, AstridLupke, MatthiasHellige, MarenOhnesorge, BernhardStaszyk, Carsten
- Language: English
Edition Identifiers:
- Internet Archive ID: pubmed-PMC3995307
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22Indications For Brain Computed Tomography Scan After Minor Head Injury.
By Sharif-Alhoseini, Mahdi, Khodadadi, Hossein, Chardoli, Mojtaba and Rahimi-Movaghar, Vafa
This article is from Journal of Emergencies, Trauma and Shock , volume 4 . Abstract Aims:: Minor head injury (MHI) is a common injury seen in Emergency Departments (ED). Computed tomography (CT) scan of the brain is a good method of investigation to diagnose intracranial lesions, but there is a disagreement about indications in MHI patients. We surveyed the post-traumatic symptoms, signs or past historical matters that can be used for the indication of brain CT scan. Materials and Methods:: All patients with MHI who were older than 2 years, had a Glasgow Coma Scale (GCS) score ≥13 and were referred to the ED, underwent brain CT scan. Data on age, headache, vomiting, loss of consciousness (LOC) or amnesia, post-traumatic seizure, physical evidence of trauma above the clavicles, alcohol intoxication, and anticoagulant usage were collected. The main outcome measure was the presence of lesions related to the trauma in brain CT scan. For categorical variables, Chi-square test was used. Results:: Six hundred and forty-two patients were examined by brain CT scan after MHI, and 388 patients (60.4%) did not have any risk indicator. Twenty patients (3.1%) had abnormal brain CT scans. The logistic regression model showed that headache (P=0.006), LOC or amnesia (P=0.024) and alcohol (P=0.036) were associated with abnormal brain CT. Conclusions:: We suggested that abnormal brain CT scan related to the trauma after MHI can be predicted by the presence of one or more of the following risk indicators: Headache, vomiting, LOC or amnesia, and alcohol intoxication. Thus, if any patient has these indicators following MHI, he must be considered as a high-risk MHI.
“Indications For Brain Computed Tomography Scan After Minor Head Injury.” Metadata:
- Title: ➤ Indications For Brain Computed Tomography Scan After Minor Head Injury.
- Authors: Sharif-Alhoseini, MahdiKhodadadi, HosseinChardoli, MojtabaRahimi-Movaghar, Vafa
- Language: English
Edition Identifiers:
- Internet Archive ID: pubmed-PMC3214503
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23Evaluation Of Hypoxia In A Feline Model Of Head And Neck Cancer Using 64Cu-ATSM Positron Emission Tomography/computed Tomography.
By Ballegeer, Elizabeth A, Madrill, Nicole J, Berger, Kevin L, Agnew, Dalen W and McNiel, Elizabeth A
This article is from BMC Cancer , volume 13 . Abstract Background: Human and feline head and neck squamous cell carcinoma (HNSCC) share histology, certain molecular features, as well as locally aggressive and highly recurrent clinical behavior. In human HNSCC, the presence of significant hypoxia within these tumors is considered an important factor in the development of a more aggressive phenotype and poor response to therapy. We hypothesized that feline head and neck tumors, particularly HNSCC, would exhibit hypoxia and that 64Cu-diacetyl-bis(N4-methylthiosemicarbazone) (Cu-ATSM) positron emission tomography/computed tomography (PET/CT) would permit detection of intratumoral hypoxia. Methods: 12 cats with measureable head and neck tumors were given 64Cu-ATSM and iodinated contrast for PET/CT scan. The presence or absence of hypoxia was also assessed using an intratumoral fluorescent life-time probe to quantitate pO2 and pimonidazole immunohistochemical staining in biopsy specimens. In two cats, intratumoral O2 and 64Cu-ATSM uptake was measured before and after treatment with anti-angiogenic agents to determine the effect of these agents on hypoxia. Results: Eleven of twelve feline tumors demonstrated significant 64Cu-ATSM uptake, regardless of malignant or benign etiology. The presence (and absence) of hypoxia was confirmed using the fluorescent O2 detection probe in nine tumors, and using pimonidazole staining in three tumors. Squamous cell carcinomas (HNSCC) demonstrated the highest degree of hypoxia, with Tmax/M ratios ranging from 4.3 to 21.8. Additional non-neoplastic tissues exhibited 64Cu-ATSM uptake suggestive of hypoxia including reactive draining lymph nodes, non-malignant thyroid pathology, a tooth root abscess, and otitis media. In two cats with HNSCC that received anti-vascular agents, the pattern of 64Cu-ATSM uptake was altered after treatment, demonstrating the potential of the feline model to study the modulation of tumor oxygenation. Conclusion: Feline HNSCC serves as a clinically relevant model for the investigation of intratumoral hypoxia including its measurement, modulation and targeting.
“Evaluation Of Hypoxia In A Feline Model Of Head And Neck Cancer Using 64Cu-ATSM Positron Emission Tomography/computed Tomography.” Metadata:
- Title: ➤ Evaluation Of Hypoxia In A Feline Model Of Head And Neck Cancer Using 64Cu-ATSM Positron Emission Tomography/computed Tomography.
- Authors: Ballegeer, Elizabeth AMadrill, Nicole JBerger, Kevin LAgnew, Dalen WMcNiel, Elizabeth A
- Language: English
Edition Identifiers:
- Internet Archive ID: pubmed-PMC3671966
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24Comparison Between Integrated Backscatter Intravascular Ultrasound And 64-slice Multi-detector Row Computed Tomography For Tissue Characterization And Volumetric Assessment Of Coronary Plaques.
By Yamaki, Takahiko, Kawasaki, Masanori, Jang, Ik-Kyung, Raffel, Owen Christopher, Ishihara, Yoshiyuki, Okubo, Munenori, Kubota, Tomoki, Hattori, Arihiro, Nishigaki, Kazuhiko, Takemura, Genzou, Fujiwara, Hisayoshi and Minatoguchi, Shinya
This article is from Cardiovascular Ultrasound , volume 10 . Abstract Background: The purpose of this study was to determine the cut-off values of Hounsfield units (HU) for the discrimination of plaque components and to evaluate the feasibility of measurement of the volume of plaque components using multi-detector row computed tomography (MDCT). Methods: Coronary lesions (125 lesions in 125 patients) were visualized by both integrated backscatter intravascular ultrasound (IB-IVUS) and 64-slice MDCT at the same site. The IB values were used as a gold standard to determine the cut off values of HU for the discrimination of plaque components. Results: Plaques were classified as lipid pool (n =50), fibrosis (n =65) or calcification (n =35) by IB-IVUS. The HU of lipid pool, fibrosis and calcification were 18 ± 18 HU (−19 to 58 HU), 95 ± 24 HU (46 to 154 HU) and 378 ± 99 HU (188 to 605 HU), respectively. Using receiver operating characteristic curve analysis, a threshold of 50 HU was the optimal cutoff values to discriminate lipid pool from fibrosis. Lipid volume measured by MDCT was correlated with that measured by IB-IVUS (r =0.66, p
“Comparison Between Integrated Backscatter Intravascular Ultrasound And 64-slice Multi-detector Row Computed Tomography For Tissue Characterization And Volumetric Assessment Of Coronary Plaques.” Metadata:
- Title: ➤ Comparison Between Integrated Backscatter Intravascular Ultrasound And 64-slice Multi-detector Row Computed Tomography For Tissue Characterization And Volumetric Assessment Of Coronary Plaques.
- Authors: ➤ Yamaki, TakahikoKawasaki, MasanoriJang, Ik-KyungRaffel, Owen ChristopherIshihara, YoshiyukiOkubo, MunenoriKubota, TomokiHattori, ArihiroNishigaki, KazuhikoTakemura, GenzouFujiwara, HisayoshiMinatoguchi, Shinya
- Language: English
Edition Identifiers:
- Internet Archive ID: pubmed-PMC3495226
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25Evaluation Of Spleen Volume In Thoracic Computed Tomography In Patients With COVID-19 Pneumonia
By Cesur Samancı,Bengü Şaylan,Gökçe Gülsen,Melike Yeşildal,Eyüp Çamurcuoğlu,Fethi Emre Ustabaşıoğlu
ABSTRACT Objectives: There is not enough data on the effect of COVID-19 on spleen volume in patients with COVID-19. Our aim was to compare the spleen volume of the COVID-19 patients with the control group. Material and Method: 214 Patients (121 men, 93 women) who have a diagnosis of COVID-19 who have thorax CT were included in the study. In the patient group, there was evidence of viral pneumonia on thoracic CT or PCR was positive, all of them were patients who received treatment for Covid. The control group consisted of 185 patients (106 men, 79 women). Interobserver agreement was calculated. Analysis of the receiver operating characteristic (ROC) curve was used to identify a spleen volume cutoff value at which the accuracy for COVID-19 diagnosis was maximised. Results: The mean spleen volume of the patient group was found to be 260 (range, 96.3-565, SD: 82.5) which was statistically significantly higher than the control group which was 220 (range, 125.9-331.9, SD: 34.5) (p
“Evaluation Of Spleen Volume In Thoracic Computed Tomography In Patients With COVID-19 Pneumonia” Metadata:
- Title: ➤ Evaluation Of Spleen Volume In Thoracic Computed Tomography In Patients With COVID-19 Pneumonia
- Author: ➤ Cesur Samancı,Bengü Şaylan,Gökçe Gülsen,Melike Yeşildal,Eyüp Çamurcuoğlu,Fethi Emre Ustabaşıoğlu
- Language: English
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- Internet Archive ID: acmj-2021-3-2-2
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26Quantification Of Red Soil Macropores Affected By Slope Erosion And Sediment Using Computed Tomography
By Si-Yi Zhang, Bin He, Yan Sun, Fan-Ling Kong and Wan-Yi Huang
Quantification of red soil macropores affected by slope erosion and sediment using computed tomography 作者: Si-Yi Zhang 1,2 Bin He 1,2 Yan Sun 1,2 Fan-Ling Kong 1,2 Wan-Yi Huang 1,2 作者单位: 1. National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China 2. Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou 510650, China 通讯作者: Bin He Email:[email protected] 提交时间: 2021-03-17 摘要: Purpose Soil structures are the main course of the formation and development of collapsing gullies, which are the most severe type of erosion in south China. However, few studies have focused on the relationship between soil macropores, soil erosion, and local topography. This study aimed to quantify and compare soil properties and macropore characteristics in the collapsing gully region, and explore their influences on the formation and development of the associated erosion. Materials and methods Soil core columns at different positions of a typical collapsing gully were excavated, and then scanned to analyze soil macropores. Moreover, soil properties and saturated hydraulic conductivity were investigated in the laboratory and in the field, respectively. Results and discussion The results indicated that the sand content increased from the ridge to the slope and the valley, while silt and clay contents decreased for the same catena. The mean weight diameter of aggregates was largest at the ridge and lowest at the valley. The infiltrate rates were highest at the valley and lowest at the slope. The valley had the greatest macroporosity (1.09±0.33%), and the highest number (5919±703), volumes (24.7±7.5 cm3) and surface (10.4±2.6 m2) of macropores, as well as the highest conectivity (42.3), while the slope had the smallest macroporosity (0.15±0.14%), and the smallest number (1189±747), volumes (3.4±3.2 cm3) and surface (1.7±1.4 m2) of macropores. The mean pore volume of macropores larger than 1 mm3 was largest at the ridge (16.8±7.4), and smallest at the slope (10.6±2.9). The number of macropores and their macroporosity mainly decreased with increasing depth, but were influenced by the soil macrofauna as well as the erosion and sediment processes. Macropores were mainly vertical, which is affected by the roots of plants and is conducive to the vertical infiltration of water. But, there wer many horizontal macropores at the valley because of the sediment process. The equivalent pore diameter of macropores was mainly smaller than 2 mm (accouting for more than 76.3%), and the macropores larger than 5 mm were less than 1%. Conclusions The macropore characteristics at different sites of the collapsing gullies affected the soil water infiltration and hydraulic conductivity, and further affected the processes of water erosion and mass ersion. The highest macroposities at the valley would result strong subsurface flow erosion and the loss of the base of collapsing wall. Macropores at the ridge would increase rain infiltration and promote soil collapsing. Few macropores and low infiltration abilities at the slope would strengthen the overland flow erosion. Thus, macropore characteristics had significant effects on both the formation and development of collapsing gullies. Soil macropores computed tomography erosion sediment collapsing gully 来自: 张思毅 分类: 农、林、牧、渔 >> 土壤学 引用: ChinaXiv:202103.00125 (或此版本 ChinaXiv:202103.00125V1 ) doi:10.12074/202103.00125 CSTR:32003.36.ChinaXiv.202103.00125.V1 推荐引用方式: Si-Yi Zhang,Bin He,Yan Sun,Fan-Ling Kong,Wan-Yi Huang.(2021).Quantification of red soil macropores affected by slope erosion and sediment using computed tomography.中国科学院科技论文预发布平台.[ChinaXiv:202103.00125] 版本历史 [V1] 2021-03-17 12:29:13 ChinaXiv:202103.00125V1 下载全文
“Quantification Of Red Soil Macropores Affected By Slope Erosion And Sediment Using Computed Tomography” Metadata:
- Title: ➤ Quantification Of Red Soil Macropores Affected By Slope Erosion And Sediment Using Computed Tomography
- Authors: Si-Yi ZhangBin HeYan SunFan-Ling KongWan-Yi Huang
“Quantification Of Red Soil Macropores Affected By Slope Erosion And Sediment Using Computed Tomography” Subjects and Themes:
- Subjects: ➤ ChinaXiv - 中国科学院科技论文预发布平台 - 农、林、牧、渔 - 土壤学 - Soil macropores - computed tomography - erosion - sediment - collapsing gully
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- Internet Archive ID: ChinaXiv-202103.00125V1
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27Computed Body Tomography With MRI Correlation
By None
Quantification of red soil macropores affected by slope erosion and sediment using computed tomography 作者: Si-Yi Zhang 1,2 Bin He 1,2 Yan Sun 1,2 Fan-Ling Kong 1,2 Wan-Yi Huang 1,2 作者单位: 1. National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China 2. Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou 510650, China 通讯作者: Bin He Email:[email protected] 提交时间: 2021-03-17 摘要: Purpose Soil structures are the main course of the formation and development of collapsing gullies, which are the most severe type of erosion in south China. However, few studies have focused on the relationship between soil macropores, soil erosion, and local topography. This study aimed to quantify and compare soil properties and macropore characteristics in the collapsing gully region, and explore their influences on the formation and development of the associated erosion. Materials and methods Soil core columns at different positions of a typical collapsing gully were excavated, and then scanned to analyze soil macropores. Moreover, soil properties and saturated hydraulic conductivity were investigated in the laboratory and in the field, respectively. Results and discussion The results indicated that the sand content increased from the ridge to the slope and the valley, while silt and clay contents decreased for the same catena. The mean weight diameter of aggregates was largest at the ridge and lowest at the valley. The infiltrate rates were highest at the valley and lowest at the slope. The valley had the greatest macroporosity (1.09±0.33%), and the highest number (5919±703), volumes (24.7±7.5 cm3) and surface (10.4±2.6 m2) of macropores, as well as the highest conectivity (42.3), while the slope had the smallest macroporosity (0.15±0.14%), and the smallest number (1189±747), volumes (3.4±3.2 cm3) and surface (1.7±1.4 m2) of macropores. The mean pore volume of macropores larger than 1 mm3 was largest at the ridge (16.8±7.4), and smallest at the slope (10.6±2.9). The number of macropores and their macroporosity mainly decreased with increasing depth, but were influenced by the soil macrofauna as well as the erosion and sediment processes. Macropores were mainly vertical, which is affected by the roots of plants and is conducive to the vertical infiltration of water. But, there wer many horizontal macropores at the valley because of the sediment process. The equivalent pore diameter of macropores was mainly smaller than 2 mm (accouting for more than 76.3%), and the macropores larger than 5 mm were less than 1%. Conclusions The macropore characteristics at different sites of the collapsing gullies affected the soil water infiltration and hydraulic conductivity, and further affected the processes of water erosion and mass ersion. The highest macroposities at the valley would result strong subsurface flow erosion and the loss of the base of collapsing wall. Macropores at the ridge would increase rain infiltration and promote soil collapsing. Few macropores and low infiltration abilities at the slope would strengthen the overland flow erosion. Thus, macropore characteristics had significant effects on both the formation and development of collapsing gullies. Soil macropores computed tomography erosion sediment collapsing gully 来自: 张思毅 分类: 农、林、牧、渔 >> 土壤学 引用: ChinaXiv:202103.00125 (或此版本 ChinaXiv:202103.00125V1 ) doi:10.12074/202103.00125 CSTR:32003.36.ChinaXiv.202103.00125.V1 推荐引用方式: Si-Yi Zhang,Bin He,Yan Sun,Fan-Ling Kong,Wan-Yi Huang.(2021).Quantification of red soil macropores affected by slope erosion and sediment using computed tomography.中国科学院科技论文预发布平台.[ChinaXiv:202103.00125] 版本历史 [V1] 2021-03-17 12:29:13 ChinaXiv:202103.00125V1 下载全文
“Computed Body Tomography With MRI Correlation” Metadata:
- Title: ➤ Computed Body Tomography With MRI Correlation
- Author: None
- Language: English
“Computed Body Tomography With MRI Correlation” Subjects and Themes:
- Subjects: ➤ {u'10': u'Computertomografie', u'12': u'Imagerie me\u0301dicale', u'15': u'Tomography, X-ray computed', u'1': u'Magnetic resonance imaging', u'0': u'Tomography', u'3': u'Magnetic Resonance Imaging', u'2': u'Tomography, X-Ray Computed', u'5': u'Imagerie par re\u0301sonance magne\u0301tique', u'4': u'Tomodensitome\u0301trie', u'7': u'Diagnostic par re\u0301sonnance magne\u0301tique', u'6': u'Tomographie'} - Tomography - Magnetic resonance imaging - Tomography, X-Ray Computed - Magnetic Resonance Imaging - Tomodensitométrie - Imagerie par résonance magnétique - Tomographie - Diagnostic par résonnance magnétique - Computertomografie - Imagerie médicale - Tomography, X-ray computed
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- Internet Archive ID: computedbodytomo0000unse
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28Computed Body Tomography With MRI Correlation
Quantification of red soil macropores affected by slope erosion and sediment using computed tomography 作者: Si-Yi Zhang 1,2 Bin He 1,2 Yan Sun 1,2 Fan-Ling Kong 1,2 Wan-Yi Huang 1,2 作者单位: 1. National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China 2. Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou 510650, China 通讯作者: Bin He Email:[email protected] 提交时间: 2021-03-17 摘要: Purpose Soil structures are the main course of the formation and development of collapsing gullies, which are the most severe type of erosion in south China. However, few studies have focused on the relationship between soil macropores, soil erosion, and local topography. This study aimed to quantify and compare soil properties and macropore characteristics in the collapsing gully region, and explore their influences on the formation and development of the associated erosion. Materials and methods Soil core columns at different positions of a typical collapsing gully were excavated, and then scanned to analyze soil macropores. Moreover, soil properties and saturated hydraulic conductivity were investigated in the laboratory and in the field, respectively. Results and discussion The results indicated that the sand content increased from the ridge to the slope and the valley, while silt and clay contents decreased for the same catena. The mean weight diameter of aggregates was largest at the ridge and lowest at the valley. The infiltrate rates were highest at the valley and lowest at the slope. The valley had the greatest macroporosity (1.09±0.33%), and the highest number (5919±703), volumes (24.7±7.5 cm3) and surface (10.4±2.6 m2) of macropores, as well as the highest conectivity (42.3), while the slope had the smallest macroporosity (0.15±0.14%), and the smallest number (1189±747), volumes (3.4±3.2 cm3) and surface (1.7±1.4 m2) of macropores. The mean pore volume of macropores larger than 1 mm3 was largest at the ridge (16.8±7.4), and smallest at the slope (10.6±2.9). The number of macropores and their macroporosity mainly decreased with increasing depth, but were influenced by the soil macrofauna as well as the erosion and sediment processes. Macropores were mainly vertical, which is affected by the roots of plants and is conducive to the vertical infiltration of water. But, there wer many horizontal macropores at the valley because of the sediment process. The equivalent pore diameter of macropores was mainly smaller than 2 mm (accouting for more than 76.3%), and the macropores larger than 5 mm were less than 1%. Conclusions The macropore characteristics at different sites of the collapsing gullies affected the soil water infiltration and hydraulic conductivity, and further affected the processes of water erosion and mass ersion. The highest macroposities at the valley would result strong subsurface flow erosion and the loss of the base of collapsing wall. Macropores at the ridge would increase rain infiltration and promote soil collapsing. Few macropores and low infiltration abilities at the slope would strengthen the overland flow erosion. Thus, macropore characteristics had significant effects on both the formation and development of collapsing gullies. Soil macropores computed tomography erosion sediment collapsing gully 来自: 张思毅 分类: 农、林、牧、渔 >> 土壤学 引用: ChinaXiv:202103.00125 (或此版本 ChinaXiv:202103.00125V1 ) doi:10.12074/202103.00125 CSTR:32003.36.ChinaXiv.202103.00125.V1 推荐引用方式: Si-Yi Zhang,Bin He,Yan Sun,Fan-Ling Kong,Wan-Yi Huang.(2021).Quantification of red soil macropores affected by slope erosion and sediment using computed tomography.中国科学院科技论文预发布平台.[ChinaXiv:202103.00125] 版本历史 [V1] 2021-03-17 12:29:13 ChinaXiv:202103.00125V1 下载全文
“Computed Body Tomography With MRI Correlation” Metadata:
- Title: ➤ Computed Body Tomography With MRI Correlation
- Language: English
“Computed Body Tomography With MRI Correlation” Subjects and Themes:
- Subjects: Tomography - Magnetic resonance imaging - Tomography, X-Ray Computed - Magnetic Resonance Imaging
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- Internet Archive ID: computedbodytomo0000unse_w4n2
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29Patent Ductus Arteriosus (PDA) In Adults Evaluatedin Echocardiography And Multi-slice Computed Tomography (MSCT)
By Czekajska-Chehab, Elżbieta Maria., Wójcik, Maciej. and Drop, Andrzej.
tytuł nagłówkowy ; artykuł w: Annales Universitatis Mariae Curie-Skłodowska. Sectio D, Medicina. Vol. 59, N1, 64 (2004), strony 339-345 ; Bibliografia na stronach 344-345.
“Patent Ductus Arteriosus (PDA) In Adults Evaluatedin Echocardiography And Multi-slice Computed Tomography (MSCT)” Metadata:
- Title: ➤ Patent Ductus Arteriosus (PDA) In Adults Evaluatedin Echocardiography And Multi-slice Computed Tomography (MSCT)
- Authors: ➤ Czekajska-Chehab, Elżbieta Maria.Wójcik, Maciej.Drop, Andrzej.
- Language: English
“Patent Ductus Arteriosus (PDA) In Adults Evaluatedin Echocardiography And Multi-slice Computed Tomography (MSCT)” Subjects and Themes:
- Subjects: medycyna - nauki medyczne
Edition Identifiers:
- Internet Archive ID: ➤ dlibra.umcs.lublin.pl.czas4054_59_1_2004_64_43626
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30Evaluation Of The Alveolar Antral Artery Position In The Lateral Sinus Wall Using Cone-beam Computed Tomography
By Fahrettin Kalabalık1, Hüseyin Akçay2 1Department of Oral & Maxillofacial Radiology 2Department of Oral & Maxillofacial Surgery, Izmir Katip Celebi University, Faculty of Dentistry, İzmir, Turkey
Aim: The aim of this study was to evaluate the prevalence and anatomic position of the alveolar antral artery (AAA) in different tooth regions of patients who underwent maxillary cone-beam computed tomography (CBCT) imaging. Materials and Methods: CBCT images of 150 patients (59 males and 91 females) were included in the study. On the coronal images, localization of AAA relative to sinus lateral wall, the diameter of AAA and classification of AAA diameter were recorded for 1st premolar, 2nd premolar, 1st molar, and 2nd molar teeth levels separately. Results: The prevalence of the detected arteries significantly increased antero-posteriorly from the 1st premolar to the 2nd molar (P<0.05). The mean diameter of the AAA was found to be 0.91±0.33 mm (range 0.25-2.90 mm) and the mean diameter of the AAA was significantly greater in males than in females (P=0.001). The AAA diameter increased antero-posteriorly from the 1st premolar to the 2nd molar. When evaluating the position of the arteries in the lateral wall of the sinus, the most frequent type of arteries was intraosseous (57.7%), followed by intrasinusal (39.0%) and superficial (3.3%). It was observed that 95.24% of all superficial type of AAAs was in the 2nd molar region. Discussion: AAA is an important structure and the clinician should be aware of location and course of the artery for surgical procedures. Careful evaluation of the AAA in maxillary sinus on CT images before surgery could reduce the possibility of excess bleeding, especially in molar areas.
“Evaluation Of The Alveolar Antral Artery Position In The Lateral Sinus Wall Using Cone-beam Computed Tomography” Metadata:
- Title: ➤ Evaluation Of The Alveolar Antral Artery Position In The Lateral Sinus Wall Using Cone-beam Computed Tomography
- Author: ➤ Fahrettin Kalabalık1, Hüseyin Akçay2 1Department of Oral & Maxillofacial Radiology 2Department of Oral & Maxillofacial Surgery, Izmir Katip Celebi University, Faculty of Dentistry, İzmir, Turkey
- Language: English
“Evaluation Of The Alveolar Antral Artery Position In The Lateral Sinus Wall Using Cone-beam Computed Tomography” Subjects and Themes:
- Subjects: Cone-beam Computed Tomography - Sinus Floor Augmentation - Blood Vessels - Intraoperative Complications
Edition Identifiers:
- Internet Archive ID: ➤ evaluation-of-the-alveolar-antral-artery-position-in-the-lateral-sinus-wall-usin
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31An Evaluation Of Automated Measurement Of Slice Sensitivity Profile Of Computed Tomography Image: Field Of View Variations
By Elvira Rizqi Widyanti, Choirul Anam, Eko Hidayanto, Ariij Naufal, Mohammad Haekal
This study aims to evaluate the automated measurement of slice sensitivity profile (SSP) on the American Association of Physicists in Medicine (AAPM) computed tomography (CT) performance phantom for variations of slice thickness and field of view (FOV). The AAPM CT performance phantom was scanned using a Philips MRC 880 CT Scanner for variations of slice thickness and FOV. The slice thickness values were 1, 3, and 5 mm. The FOV values were 240, 300, 340, 400, and 440 mm. The automated SSPs and their fullwidth at half maximums (FWHMs) were automatically measured from the middle stair object of the phantom. To validate the automated measurement results, the FWHM values of SSPs obtained were compared to those from manual measurements. The differences between FWHMs from automated measurements and set slice thicknesses are less than 0.3 mm, while the differences between FWHMs from automated and manual measurements are less than 0.2 mm. The results from automated measurements are closer to the set slice thickness than those from manual measurements. This automated SSP measurement provides high accuracy and precision for both the slice thickness and the FOV variations.
“An Evaluation Of Automated Measurement Of Slice Sensitivity Profile Of Computed Tomography Image: Field Of View Variations” Metadata:
- Title: ➤ An Evaluation Of Automated Measurement Of Slice Sensitivity Profile Of Computed Tomography Image: Field Of View Variations
- Author: ➤ Elvira Rizqi Widyanti, Choirul Anam, Eko Hidayanto, Ariij Naufal, Mohammad Haekal
- Language: English
“An Evaluation Of Automated Measurement Of Slice Sensitivity Profile Of Computed Tomography Image: Field Of View Variations” Subjects and Themes:
- Subjects: ➤ AAPM computed tomography performance phantom - Computed tomography scan - Slice sensitivity profile - Slice thickness
Edition Identifiers:
- Internet Archive ID: ➤ 10.11591ijeecs.v29.i3.pp1430-1437
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32Exploring The Use Of Micro-computed Tomography (micro-CT) In The Taxonomy Of Sea Cucumbers: A Case-study On The Gravel Sea Cucumber Neopentadactyla Mixta (Östergren, 1898) (Echinodermata, Holothuroidea, Phyllophoridae)
By Samyn, Yves, Sonet, Gontran and d'Acoz, Cedric d'Udekem
This study aims to evaluate the automated measurement of slice sensitivity profile (SSP) on the American Association of Physicists in Medicine (AAPM) computed tomography (CT) performance phantom for variations of slice thickness and field of view (FOV). The AAPM CT performance phantom was scanned using a Philips MRC 880 CT Scanner for variations of slice thickness and FOV. The slice thickness values were 1, 3, and 5 mm. The FOV values were 240, 300, 340, 400, and 440 mm. The automated SSPs and their fullwidth at half maximums (FWHMs) were automatically measured from the middle stair object of the phantom. To validate the automated measurement results, the FWHM values of SSPs obtained were compared to those from manual measurements. The differences between FWHMs from automated measurements and set slice thicknesses are less than 0.3 mm, while the differences between FWHMs from automated and manual measurements are less than 0.2 mm. The results from automated measurements are closer to the set slice thickness than those from manual measurements. This automated SSP measurement provides high accuracy and precision for both the slice thickness and the FOV variations.
“Exploring The Use Of Micro-computed Tomography (micro-CT) In The Taxonomy Of Sea Cucumbers: A Case-study On The Gravel Sea Cucumber Neopentadactyla Mixta (Östergren, 1898) (Echinodermata, Holothuroidea, Phyllophoridae)” Metadata:
- Title: ➤ Exploring The Use Of Micro-computed Tomography (micro-CT) In The Taxonomy Of Sea Cucumbers: A Case-study On The Gravel Sea Cucumber Neopentadactyla Mixta (Östergren, 1898) (Echinodermata, Holothuroidea, Phyllophoridae)
- Authors: Samyn, YvesSonet, Gontrand'Acoz, Cedric d'Udekem
- Language: English
“Exploring The Use Of Micro-computed Tomography (micro-CT) In The Taxonomy Of Sea Cucumbers: A Case-study On The Gravel Sea Cucumber Neopentadactyla Mixta (Östergren, 1898) (Echinodermata, Holothuroidea, Phyllophoridae)” Subjects and Themes:
- Subjects: Integrative taxonomy - micro-CT - Normandy - scanning electron microscopy
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- Internet Archive ID: exploringusemic1054samy
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33Ruptured Abdominal Aortic Aneurysm In Computed Tomography
By Złomaniec, Janusz., Gwizdak, Jacek. and Szafranek, Joanna.
artykuł w: Annales Universitatis Mariae Curie-Skłodowska. Sectio D, Medicina. Vol. 59, N2, 153 (2004), strony 308-312 ; tytuł nagłówkowy: Annales Universitatis Mariae Curie-Skłodowska Lublin-Polonia. Sectio D ; Bibliografia na stronie 311.
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- Title: ➤ Ruptured Abdominal Aortic Aneurysm In Computed Tomography
- Authors: Złomaniec, Janusz.Gwizdak, Jacek.Szafranek, Joanna.
- Language: English
“Ruptured Abdominal Aortic Aneurysm In Computed Tomography” Subjects and Themes:
- Subjects: medycyna - nauki medyczne
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- Internet Archive ID: ➤ dlibra.umcs.lublin.pl.czas4054_59_2_2004_60_44377
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34Rectal Carcinoma In Spiral Computed Tomography : MPR, VRT And Virtual Rectoscopy
By Bryc, Stanisław
artykuł w: Annales Universitatis Mariae Curie-Skłodowska. Sectio D, Medicina. Vol. 60, N2, 127 (2005), strony 644-650. ; Bibliografia na stronach 648-649.
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- Title: ➤ Rectal Carcinoma In Spiral Computed Tomography : MPR, VRT And Virtual Rectoscopy
- Author: Bryc, Stanisław
- Language: English
“Rectal Carcinoma In Spiral Computed Tomography : MPR, VRT And Virtual Rectoscopy” Subjects and Themes:
- Subjects: medycyna - nauki medyczne
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- Internet Archive ID: ➤ dlibra.umcs.lublin.pl.czas4054_60_2_2005_23_44185
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35Development Of Computed Tomography - Past And Present Scanner Generations
By Majdan, Maria. Redaktor sekcji
artykuł w: Annales Universitatis Mariae Curie-Skłodowska. Sectio D, Medicina. Vol. 62, N1, 49 (2007), strony 260-266. ; Bibliografia na stronie 265.
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- Author: Majdan, Maria. Redaktor sekcji
- Language: English
“Development Of Computed Tomography - Past And Present Scanner Generations” Subjects and Themes:
- Subjects: medycyna - nauki medyczne
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- Internet Archive ID: ➤ dlibra.umcs.lublin.pl.czas4054_62_1_2007_49_44457
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36Dynamic Computed Tomography : Basic Principles And Clinical Applications
By Claussen, Claus
artykuł w: Annales Universitatis Mariae Curie-Skłodowska. Sectio D, Medicina. Vol. 62, N1, 49 (2007), strony 260-266. ; Bibliografia na stronie 265.
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- Title: ➤ Dynamic Computed Tomography : Basic Principles And Clinical Applications
- Author: Claussen, Claus
- Language: English
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37Multislice Computed Tomography : A Practical Approach To Clinical Protocols
artykuł w: Annales Universitatis Mariae Curie-Skłodowska. Sectio D, Medicina. Vol. 62, N1, 49 (2007), strony 260-266. ; Bibliografia na stronie 265.
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- Language: English
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38DTIC ADA249099: Computed Tomography Analysis Of Castings
By Defense Technical Information Center
Under a preliminary testing task assignment of the Advanced Development of X-ray Computed Tomography Application program, computed tomography (CT) has been studied for its potential use in the analysis of castings. Because CT is quantitative, it offers a nondestructive evaluation (NDE) capability that can be used for engineering analysis, accurate dimensional measurement and for reconstructing three-dimensional models of cast components using Stereolithography. CT sensitivity to anomaly sizes has been measured by the use of image quality indicators. The sensitivity of a CT system, as a function of object size and system operating parameters, can be established and monitored. The three-dimensional location and definition of flaws, obtained from CT evaluation of castings, have been input into finite element engineering models to analyze the performance as a function of the casting condition. A significant cost savings in the manufacture of castings and their increased aerospace application is possible if CT evaluation and fitness-for-service criteria are used. Dimensional measurements with excellent accuracies and precision better than 0.050 mm (0.001 2 inch) have been demonstrated. The data sets from CT scanning have been converted to CAD/CAM files and input to a Stereolithography system to build a 3D plastic model of a part. Computed Tomography (CT), Castings, Image Quality Indicators (IQI), Defect, Defect sensitivity, Finite Element Analysis (FEA), Phantom, Stereolithography, Modulation, Noise, Dimensional measurement, Gap measurement.
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- Title: ➤ DTIC ADA249099: Computed Tomography Analysis Of Castings
- Author: ➤ Defense Technical Information Center
- Language: English
“DTIC ADA249099: Computed Tomography Analysis Of Castings” Subjects and Themes:
- Subjects: ➤ DTIC Archive - Bossi, Richard H - BOEING DEFENSE AND SPACE GROUP SEATTLE WA AEROSPACE AND ELECTRONICS DIV - *TOMOGRAPHY - *CASTINGS - SCANNING - INPUT - FUNCTIONS - ANOMALIES - MEASUREMENT - MODELS - PARAMETERS - SENSITIVITY - COSTS - THREE DIMENSIONAL - QUALITY - ENGINEERING - IMAGES - PRECISION - ALLOCATIONS - CAMS - NOISE - MODULATION - PLASTICS - INDICATORS - SAVINGS
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- Internet Archive ID: DTIC_ADA249099
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39Muscle Morphometric Effect Of Anterior Cruciate Ligament Injury Measured By Computed Tomography: Aspects On Using Non-injured Leg As Control.
By Strandberg, Soren, Lindstrom, Maria, Wretling, Marie-Louise, Aspelin, Peter and Shalabi, Adel
This article is from BMC Musculoskeletal Disorders , volume 14 . Abstract Background: Anterior cruciate ligament (ACL) tears are common, functionally disabling, and predispose to subsequent injuries and early onset of osteoarthritis in the knee. Injuries result in muscular atrophy and impaired muscular activation. To optimize surgical methods and rehabilitation strategies, knowledge of the effects of ACL injuries on muscles size and function is needed. Asymmetry due to limb dominance implies that the effect of ACL-injury might be different in right-sided and left-sided injuries which, should be taken in account when evaluating the effect of an injury. Evaluation of the effects of injuries is usually made with the contralateral leg as control. The aim of this study is to describe the effect of ACL-injuries on thigh muscle size and also to analyze feasibility of using contralateral limb as control. Methods: Sixty-two patients scheduled to undergo ACL reconstruction were examined with computed tomography (CT). Muscle cross sectional area (CSA) was recorded for quadriceps, hamstrings, gracilis and sartorius 15 cm above the knee joint. Comparisons were made between the injured and non-injured side and between individuals separated by gender and side of injury. Comparisons were also made for patients with or without concomitant meniscal tear, for patients differing in time between injury and examinations and for patients with different level of physical activity after the injury. Results: Quadriceps CSA was 5% smaller on the injured side. There was an indication that the muscles of the right thigh were generally bigger than those of the left thigh. The difference between the injured and the non-injured side was larger for right-sided injuries than for left-sided. There was also a greater difference in semimembranosus for women than for men. There were no differences related to meniscal injury, time since injury or physical activity. Conclusion: The use of contralateral leg for evaluating the effect of ACL-injury is often the only available alternative but our study indicates that the difference in CSA between injured and non-injured side does not necessarily reflect the true degree of atrophy, as there are side differences both in muscle size in general and in the effect of an ACL-injury on muscle size.
“Muscle Morphometric Effect Of Anterior Cruciate Ligament Injury Measured By Computed Tomography: Aspects On Using Non-injured Leg As Control.” Metadata:
- Title: ➤ Muscle Morphometric Effect Of Anterior Cruciate Ligament Injury Measured By Computed Tomography: Aspects On Using Non-injured Leg As Control.
- Authors: Strandberg, SorenLindstrom, MariaWretling, Marie-LouiseAspelin, PeterShalabi, Adel
- Language: English
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- Internet Archive ID: pubmed-PMC3654923
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40Risk Factors For Severe Diverticulitis In Computed Tomography-Confirmed Acute Diverticulitis In Korea.
By Park, Nark-Soon, Jeen, Yoon Tae, Choi, Hyuk Soon, Kim, Eun Sun, Kim, Young Jin, Keum, Bora, Seo, Yeon Seok, Chun, Hoon Jai, Lee, Hong Sik, Um, Soon Ho, Kim, Chang Duck and Ryu, Ho Sang
This article is from Gut and Liver , volume 7 . Abstract Background/Aims: Acute complicated diverticulitis can be subdivided into moderate diverticulitis and severe diverticulitis. Although there have been numerous studies on the risk factors for complicated diverticulitis, little research has focused on severe diverticulitis. This study was designed to identify the risk factors for severe diverticulitis in an acute diverticulitis attack using the modified Hinchey classification. Methods: Patients were included if they had any evidence of acute diverticulitis detected by computed tomography. The patients were subdivided into severe diverticulitis (Hinchey class ≥Ib; abscesses or peritonitis) and moderate diverticulitis (Hinchey class Ia; pericolic inflammation) groups. Results: Of the 128 patients, 25 exhibited severe diverticulitis, and 103 exhibited moderate diverticulitis. In a multivariate analysis, age >50 years (odds ratio [OR], 5.27; p=0.017), smoking (OR, 3.61; p=0.044), comorbidity (OR, 4.98; p=0.045), leukocytosis (OR, 7.70; p=0.003), recurrence (OR, 4.95; p=0.032), and left-sided diverticulitis (OR, 6.92; p=0.006) were significantly associated with severe diverticulitis. Conclusions: This study suggests that the risk factors for severe diverticulitis are age >50 years, smoking, comorbidity, leukocytosis, recurrent episodes, and left-sided diverticulitis.
“Risk Factors For Severe Diverticulitis In Computed Tomography-Confirmed Acute Diverticulitis In Korea.” Metadata:
- Title: ➤ Risk Factors For Severe Diverticulitis In Computed Tomography-Confirmed Acute Diverticulitis In Korea.
- Authors: ➤ Park, Nark-SoonJeen, Yoon TaeChoi, Hyuk SoonKim, Eun SunKim, Young JinKeum, BoraSeo, Yeon SeokChun, Hoon JaiLee, Hong SikUm, Soon HoKim, Chang DuckRyu, Ho Sang
- Language: English
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- Internet Archive ID: pubmed-PMC3724033
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41Adapting The Computed Tomography Criteria Of Hemorrhagic Transformation To Stroke Magnetic Resonance Imaging.
By Neeb, Lars, Villringer, Kersten, Galinovic, Ivana, Grosse-Dresselhaus, Florian, Ganeshan, Ramanan, Gierhake, Daniel, Kunze, Claudia, Grittner, Ulrike and Fiebach, Jochen B.
This article is from Cerebrovascular Diseases Extra , volume 3 . Abstract Background: The main safety aspect in the use of stroke thrombolysis and in clinical trials of new pharmaceutical or interventional stroke therapies is the incidence of hemorrhagic transformation (HT) after treatment. The computed tomography (CT)-based classification of the European Cooperative Acute Stroke Study (ECASS) distinguishes four categories of HTs. An HT can range from a harmless spot of blood accumulation to a symptomatic space-occupying parenchymal bleeding associated with a massive deterioration of symptoms and clinical prognosis. In magnetic resonance imaging (MRI) HTs are often categorized using the ECASS criteria although this classification has not been validated in MRI. We developed MRI-specific criteria for the categorization of HT and sought to assess its diagnostic reliability in a retrospective study. Methods: Consecutive acute ischemic stroke patients, who had received a 3-tesla MRI before and 12-36 h after thrombolysis, were screened retrospectively for an HT of any kind in post-treatment MRI. Intravenous tissue plasminogen activator was given to all patients within 4.5 h. HT categorization was based on a simultaneous read of 3 different MRI sequences (fluid-attenuated inversion recovery, diffusion-weighted imaging and T2* gradient-recalled echo). Categorization of HT in MRI accounted for the various aspects of the imaging pattern as the shape of the bleeding area and signal intensity on each sequence. All data sets were independently categorized in a blinded fashion by 3 expert and 3 resident observers. Interobserver reliability of this classification was determined for all observers together and for each group separately by calculating Kendall's coefficient of concordance (W). Results: Of the 186 patients screened, 39 patients (21%) had an HT in post-treatment MRI and were included for the categorization of HT by experts and residents. The overall agreement of HT categorization according to the modified classification was substantial for all observers (W = 0.79). The degrees of agreement between experts (W = 0.81) and between residents (W = 0.87) were almost perfect. For the distinction between parenchymal hematoma and hemorrhagic infarction, the interobserver agreement was almost perfect for all observers taken together (W = 0.82) as well as when experts (W = 0.82) and residents (W = 0.91) were analyzed separately. Conclusion: The ECASS CT classification of HT was successfully adapted for usage in MRI. It leads to a substantial to almost perfect interobserver agreement and can be used for safety assessment in clinical trials.
“Adapting The Computed Tomography Criteria Of Hemorrhagic Transformation To Stroke Magnetic Resonance Imaging.” Metadata:
- Title: ➤ Adapting The Computed Tomography Criteria Of Hemorrhagic Transformation To Stroke Magnetic Resonance Imaging.
- Authors: ➤ Neeb, LarsVillringer, KerstenGalinovic, IvanaGrosse-Dresselhaus, FlorianGaneshan, RamananGierhake, DanielKunze, ClaudiaGrittner, UlrikeFiebach, Jochen B.
- Language: English
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- Internet Archive ID: pubmed-PMC3776466
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42A Synchrotron-based Local Computed Tomography Combined With Data-constrained Modelling Approach For Quantitative Analysis Of Anthracite Coal Microstructure.
By Chen, Wen Hao, Yang, Sam Y. S., Xiao, Ti Qiao, Mayo, Sherry C., Wang, Yu Dan and Wang, Hai Peng
This article is from Journal of Synchrotron Radiation , volume 21 . Abstract A quantitative local computed tomography combined with data-constrained modelling has been developed. The method could improve distinctly the spatial resolution and the composition resolution in a sample larger than the field of view, for quantitative characterization of three-dimensional distributions of material compositions and void.
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- Title: ➤ A Synchrotron-based Local Computed Tomography Combined With Data-constrained Modelling Approach For Quantitative Analysis Of Anthracite Coal Microstructure.
- Authors: ➤ Chen, Wen HaoYang, Sam Y. S.Xiao, Ti QiaoMayo, Sherry C.Wang, Yu DanWang, Hai Peng
- Language: English
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- Internet Archive ID: pubmed-PMC3998815
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43Rhinoceros Feet Step Out Of A Rule-of-Thumb: A Wildlife Imaging Pioneering Approach Of Synchronized Computed Tomography-Digital Radiography.
By Galateanu, Gabriela, Hermes, Robert, Saragusty, Joseph, Goritz, Frank, Potier, Romain, Mulot, Baptiste, Maillot, Alexis, Etienne, Pascal, Bernardino, Rui, Fernandes, Teresa, Mews, Jurgen and Hildebrandt, Thomas Bernd
This article is from PLoS ONE , volume 9 . Abstract Currently, radiography is the only imaging technique used to diagnose bone pathology in wild animals situated under “field conditions”. Nevertheless, while chronic foot disease in captive mega-herbivores is widely reported, foot radiographic imaging is confronted with scarcity of studies. Numerous hindrances lead to such limited numbers and it became very clear that the traditional perspective on bone imaging in domestic animals based on extensive studies and elaborated statistical evaluations cannot be extrapolated to their non-domestic relatives. For these reasons, the authors initiated a multi-modality imaging study and established a pioneering approach of synchronized computed tomography (CT) and digital radiography (DR), based on X-ray projections derived from three-dimensional CT reconstructed images. Whereas this approach can be applied in any clinical field, as a case of outstanding importance and great concern for zoological institutions, we selected foot bone pathologies in captive rhinoceroses to demonstrate the manifold applications of the method. Several advances were achieved, endowing the wildlife clinician with all-important tools: prototype DR exposure protocols and a modus operandi for foot positioning, advancing both traditional projections and, for the first-time, species-related radiographic views; assessment of radiographic diagnostic value for the whole foot and, in premiere, for each autopodial bone; together with additional insights into radiographic appearance of bone anatomy and pathology with a unique, simultaneous CT-DR correlation. Based on its main advantages in availing a wide range of keystone data in wildlife imaging from a limited number of examined subjects and combining advantages of CT as the golden standard method for bone diseases' diagnostic with DR's clinical feasibility under field conditions, synchronized CT-DR presents a new perspective on wildlife's health management. With this we hope to provide veterinary clinicians with concrete imaging techniques and substantial diagnostic tools, which facilitate straightforward attainment and interpretation of field radiography images taken worldwide.
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- Title: ➤ Rhinoceros Feet Step Out Of A Rule-of-Thumb: A Wildlife Imaging Pioneering Approach Of Synchronized Computed Tomography-Digital Radiography.
- Authors: ➤ Galateanu, GabrielaHermes, RobertSaragusty, JosephGoritz, FrankPotier, RomainMulot, BaptisteMaillot, AlexisEtienne, PascalBernardino, RuiFernandes, TeresaMews, JurgenHildebrandt, Thomas Bernd
- Language: English
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- Internet Archive ID: pubmed-PMC4070926
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44Endoscopic Ultrasound Versus Computed Tomography For Preoperative Evaluation Of Primary Ampullary Tumors
By Yusuf Uzum1, Hakan Camyar2, Ugur Bayram Korkmaz1, Zeynep Zehra Gumus1, Emrah Alper3 1Department of Internal Medicine, Katip Celebi University, Ataturk Training and Research Hospital, Izmir 2Department of Gastroenterology, Katip Celebi University, Ataturk Training and Research Hospital, Izmir 3Department of Gastroenterology, Koc University Hospital, Istanbul, Turkey
Aim: The study aimed to compare the efficacy of endoscopic ultrasound (EUS) and computed tomography (CT) in detecting primary tumor and evaluating preoperative vascular and peripheral invasion in histopathologically proven malignant ampullar tumors. Material and Methods: Fifty-two patients who underwent surgery or endoscopic ampullectomy for the primary ampullary tumors between 2014 and 2016 were evaluated. The demographic data and EUS, CT, pathology results of all patients were recorded. The efficacy of EUS and CT in detecting tumor, peripheral tissue invasion, and vascular tissue invasion was evaluated and compared with pathology results. Results: Forty-nine patients had the Whipple procedure and 3 patients underwent endoscopic ampullectomy. In pathology results, all patients had adenocarcinoma histology, and the mean tumor diameter was 20.12 mm. The rate of peripheral tissue invasion and vascular invasion was 86.5%, 5.8% respectively. Ampullary mass was detected in 41 (78.8%) patients by EUS, in 35 (67.3%) by CT (p=0.002). Three patients had a vascular invasion in pathology. The sensitivity and specificity of EUS in detecting vascular invasion were 66% and 100%, respectively. CT failed to demonstrate vascular invasion in these 3 patients. Discussion: The results showed that EUS was superior to CT in detecting a mass, peripheral tissue invasion, and vascular invasion. Although EUS is superior to CT, CT plays an important role in the evaluation of distant metastases, and therefore CT and EUS are two important complementary radiological tests in the evaluation of these patients.
“Endoscopic Ultrasound Versus Computed Tomography For Preoperative Evaluation Of Primary Ampullary Tumors” Metadata:
- Title: ➤ Endoscopic Ultrasound Versus Computed Tomography For Preoperative Evaluation Of Primary Ampullary Tumors
- Author: ➤ Yusuf Uzum1, Hakan Camyar2, Ugur Bayram Korkmaz1, Zeynep Zehra Gumus1, Emrah Alper3 1Department of Internal Medicine, Katip Celebi University, Ataturk Training and Research Hospital, Izmir 2Department of Gastroenterology, Katip Celebi University, Ataturk Training and Research Hospital, Izmir 3Department of Gastroenterology, Koc University Hospital, Istanbul, Turkey
- Language: English
“Endoscopic Ultrasound Versus Computed Tomography For Preoperative Evaluation Of Primary Ampullary Tumors” Subjects and Themes:
- Subjects: Endoscopic Ultrasound - Ampullary tumors - Preoperative evaluation
Edition Identifiers:
- Internet Archive ID: ➤ endoscopic-ultrasound-versus-computed-tomography-for-preoperative-evaluation-of-
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45Artificial Intelligence Applications For Osteoporosis Classification Using Computed Tomography: A Systematic Review
By Wilson Ong Ying Fa
Osteoporosis, characterized by reduced bone mineral density (BMD), is a primary cause of fractures. While dual-energy X-ray absorptiometry (DEXA) remains the gold standard for measuring BMD, it is not readily available in every institution. Computed Tomography (CT) is widely used to evaluate an extensive range of diseases. With the emergence of artificial intelligence (AI) techniques, several studies have demonstrated the high accuracy of using CT images to predict and classify osteoporosis. This approach offers the additional benefits of opportunistic screening, reduced radiation and healthcare costs, and improved patient outcomes through early detection and management. This study aims to systematically review the current evidence for AI methods in predicting and classifying BMD from CT images, as well as discuss the clinical implications and potential challenges.
“Artificial Intelligence Applications For Osteoporosis Classification Using Computed Tomography: A Systematic Review” Metadata:
- Title: ➤ Artificial Intelligence Applications For Osteoporosis Classification Using Computed Tomography: A Systematic Review
- Author: Wilson Ong Ying Fa
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- Internet Archive ID: osf-registrations-pvwef-v1
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46Clinical Application Of Micro-computed Tomography In Breast Cancer Management: A Systematic Review And Meta-analysis
By Andreas Papazoglou, Mahtab Vasigh, Mostafa Meshkati and Alexandros Liatsos
Our systematic review constitutes the first systematic approach to all core-aspects of micro-CT-based evaluation of resected breast tumor tissues, microcalcifications, shaved cavity margins, and axillary lymph nodes. We also aim to perform a meta-analysis on the diagnostic accuracy of micro-CT for margin pathology investigation as compared to the gold standard histopathological assessment. A systematic review of the literature will be performed regarding the applications of micro-CT in breast cancer and we will discuss current and future clinical applications of micro-CT in breast cancer management.
“Clinical Application Of Micro-computed Tomography In Breast Cancer Management: A Systematic Review And Meta-analysis” Metadata:
- Title: ➤ Clinical Application Of Micro-computed Tomography In Breast Cancer Management: A Systematic Review And Meta-analysis
- Authors: Andreas PapazoglouMahtab VasighMostafa MeshkatiAlexandros Liatsos
Edition Identifiers:
- Internet Archive ID: osf-registrations-342h8-v1
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47Computed Tomography Grading Of Fatty Liver Disease In Alcoholic And Non-alcoholic Patients
By Medical Science (Journal)
Background: Last three decades, the universality of non-alcoholic Steatohepatitis has been continuously on the rise. Fatty liver diagnostic assessment could also do using cross-sectional non–contrast CT imaging.
“Computed Tomography Grading Of Fatty Liver Disease In Alcoholic And Non-alcoholic Patients” Metadata:
- Title: ➤ Computed Tomography Grading Of Fatty Liver Disease In Alcoholic And Non-alcoholic Patients
- Author: Medical Science (Journal)
- Language: English
“Computed Tomography Grading Of Fatty Liver Disease In Alcoholic And Non-alcoholic Patients” Subjects and Themes:
- Subjects: Alcoholic - Computed Tomography - Fatty liver - and Non-alcoholic
Edition Identifiers:
- Internet Archive ID: ➤ httpsdiscoveryjournals.orgmedicalsciencecurrent_issuev27n137e313ms3109.pdf_202406
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48Effectiveness Of Reciprocating Kinematics For Removal Of Endodontic Filling Material Evaluated By Micro-computed Tomography: Systematic Review And Meta-analysis Of Laboratory Studies.
By Victor Bento Oliveira and Mirlyn de Souza Dias
One of the main difficulties faced by clinicians during an endodontic retreatment is the permanenceof filling material in the walls of the canals, as it can compromise the prognosis of the reintervention.Thus, this systematic review proposes to answer the following PICOS strategy: Are instruments thatact through reciprocating kinematics more effective than instruments that use rotational kinematicsin removing filling material in endodontic retreatment of permanent human teeth when evaluatingthe remaining volume of filling material on the root canal walls using micro-computed tomography?
“Effectiveness Of Reciprocating Kinematics For Removal Of Endodontic Filling Material Evaluated By Micro-computed Tomography: Systematic Review And Meta-analysis Of Laboratory Studies.” Metadata:
- Title: ➤ Effectiveness Of Reciprocating Kinematics For Removal Of Endodontic Filling Material Evaluated By Micro-computed Tomography: Systematic Review And Meta-analysis Of Laboratory Studies.
- Authors: Victor Bento OliveiraMirlyn de Souza Dias
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- Internet Archive ID: osf-registrations-kfxyb-v1
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49Cardiovascular Multidetector Computed Tomography Angiography
One of the main difficulties faced by clinicians during an endodontic retreatment is the permanenceof filling material in the walls of the canals, as it can compromise the prognosis of the reintervention.Thus, this systematic review proposes to answer the following PICOS strategy: Are instruments thatact through reciprocating kinematics more effective than instruments that use rotational kinematicsin removing filling material in endodontic retreatment of permanent human teeth when evaluatingthe remaining volume of filling material on the root canal walls using micro-computed tomography?
“Cardiovascular Multidetector Computed Tomography Angiography” Metadata:
- Title: ➤ Cardiovascular Multidetector Computed Tomography Angiography
- Language: English
“Cardiovascular Multidetector Computed Tomography Angiography” Subjects and Themes:
- Subjects: ➤ Angiocardiography - Heart -- Tomography - Angiocardiography -- methods - Cardiovascular Diseases -- diagnostic imaging - Radiography - Tomography, X-Ray Computed
Edition Identifiers:
- Internet Archive ID: cardiovascularmu0000unse
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50DTIC ADA259728: High Resolution Computed Tomography
By Defense Technical Information Center
High resolution (greater than 4 line pairs per millimeter) computed tomography (CT) has been studied for its potential use for engineering evaluation of aerospace components. The CT images provide two dimensional maps of material linear x-ray attenuation coefficients for small volume elements, smaller than 0.001 cubic millimeters. These images are similar to micrographic images of polished surfaces from sectioned components, but are achieved nondestructively. For investigating materials where destructive sectioning relieves stresses, changing the internal configuration of features, such as gaps, high resolution CT provides superior diagnostic information for engineering evaluation. The primary benefits of CT are realized in accelerating schedules through faster data acquisition and reducing engineering risk by providing increased information nondestructively. High resolution CT is particularly well suited to assist in failure analysis investigations. Multiple slice or volume reconstruction high resolution CT can provide full three dimensional models. The cost and performance of high resolution CT systems are functions of the component size and ultimate resolution capability. For many common evaluation needs, the capital cost can be as low as a 50 percent cost add-on to a real-time radiographic imaging system. Relative to micrography, CT can be performed in about on-fifth the time, depending on the number of samples.
“DTIC ADA259728: High Resolution Computed Tomography” Metadata:
- Title: ➤ DTIC ADA259728: High Resolution Computed Tomography
- Author: ➤ Defense Technical Information Center
- Language: English
“DTIC ADA259728: High Resolution Computed Tomography” Subjects and Themes:
- Subjects: ➤ DTIC Archive - Bossi, Richard H - BOEING AEROSPACE AND ELECTRONICS CO SEATTLE WA - *AIRCRAFT - *NONDESTRUCTIVE TESTING - *CERAMIC MATERIALS - *AEROSPACE CRAFT - *COMPOSITE MATERIALS - *TOMOGRAPHY - STRESSES - MODELS - HIGH RESOLUTION - TIME - SURFACES - RADIOGRAPHY - FAILURE(MECHANICS) - DATA ACQUISITION - IMAGES - DEFECTS(MATERIALS) - THREE DIMENSIONAL - COSTS - X RAYS - TWO DIMENSIONAL - REAL TIME - MANUFACTURING - RISK
Edition Identifiers:
- Internet Archive ID: DTIC_ADA259728
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Source: The Open Library
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Available books for downloads and borrow from The Open Library
1Computed Tomography
By Stewart C. Bushong

“Computed Tomography” Metadata:
- Title: Computed Tomography
- Author: Stewart C. Bushong
- Language: English
- Number of Pages: Median: 176
- Publisher: ➤ McGraw-Hill, Health Professions Divison - McGraw-Hill Medical
- Publish Date: 2000
- Publish Location: New York
- Dewey Decimal Classification:
- Library of Congress Classification: RC-0078.70000000.T6 B87 2000
“Computed Tomography” Subjects and Themes:
- Subjects: ➤ Tomography, Emission - Emission Tomography - Tomography - Computertomografie - Tomografia computadorizada de emissão - Tomographie (mathématiques) - Rayons X. - Tomographie par émission - Tomography, X-Ray Computed - Instrumentation - Methods - Tomography, x-ray computed--instrumentation - Tomography, x-ray computed--methods - Rc78.7.t6 b87 2000 - 2000 h-129 - Wn 206 b979c 2000
Edition Identifiers:
- The Open Library ID: OL18376321M - OL9252847M - OL7298170M
- Online Computer Library Center (OCLC) ID: 42890292 - 44716828
- Library of Congress Control Number (LCCN): 99059534
- All ISBNs: 9780071343541 - 0071343547
Book Classifications
- Library of Congress Classification (LCC): ➤ ❛RC-0078.70000000.T6 B87 2000❜.
First Setence:
"Computed tomography (CT) has also been identified as computerized axial tomography (CAT), computerized transaxial tomography (CTAT), and digital axial tomography (DAT)."
Access and General Info:
- First Year Published: 2000
- Is Full Text Available: Yes
- Is The Book Public: No
- Access Status: Borrowable
Online Access
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