Algebraic Reconstruction Techniques
To this point, we have studied how Fourier transform methods are used in image reconstruction. This is the approach taken in the seminal work of Cormack  and used in the algorithms of today’s CT scan machines. However, the first CT scanner, designed in the late 1960 s by Godfrey Hounsfield, used an approach grounded in linear algebra and matrix theory to generate an image from the machine readings. Algorithms that adopt this point of view are known as algebraic reconstruction techniques, or ART, for short. In this chapter, we look at a few basic mathematical elements of ART.
KeywordsNormal Equation Relaxation Parameter Feasibility Problem Algebraic Reconstruction Technique Image Grid
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