Computer-Generated Projections for Simulations

Abstract

Any new image reconstruction algorithm or indeed any modification of an existing method requires a computer simulation to verify its usefulness. In previous chapters, a number of reconstruction methods have been introduced and in order to facilitate their practical application, we took the opportunity to give their discrete versions. One of the biggest problems when it comes to testing reconstruction algorithms is the difficulty in obtaining a set of projection values measured physically by a CT scanner. Moreover, if we were to use measurements obtained from a scanner, we would really need a set of standard projections in order to compare the different image reconstruction algorithms, particularly as real, physical projections are affected by various types of distortion whose nature and degree are uncertain.