Explore: Subtraction Technique

Subtraction (which is signified by the minus sign, –) is one of the four arithmetic operations along with addition, multiplication and division. Subtraction

using a subtraction technique. Because DSA requires the patient to remain motionless, it cannot be used on the heart. Both these techniques enable the

Digital subtraction angiography (DSA) is a fluoroscopy technique used in interventional radiology to clearly visualize blood vessels in a bony or dense

Image subtraction or pixel subtraction or difference imaging is an image processing technique whereby the digital numeric value of one pixel or whole

meeting criteria L1 through L4 above. Replacing XOR by addition and subtraction gives various slightly different, but largely equivalent, formulations

whose aim is to detect changes in image sequences. Background subtraction is any technique which allows an image's foreground to be extracted for further

pairs of mutually additive inverse numbers are called complements. Thus subtraction of any number is implemented by adding its complement. Changing the sign

DR, Obuchowski NA, Difilippo FP. "Preoperative 123I/99mTc-sestamibi subtraction SPECT and SPECT/CT in primary hyperparathyroidism". J Nucl Med. 49: 2012–7

{x}{y}}-1\right)y&=x-y\,{\text{ (subtraction)}}.\end{aligned}}} This is similar to the addition/subtraction technique used for high-speed electronic circuits

and periodicity above). These are also known as the angle addition and subtraction theorems (or formulae). sin ⁡ ( α + β ) = sin ⁡ α cos ⁡ β + cos ⁡ α sin