Abstract:

Cone-beam CT is an important research topic in image reconstruction. The first thing to do in the study of image reconstruction algorithm is to acquire projections. This paper presents several general methods of X-ray projection simulation, and discusses conditions under which different methods are applicable. Experiments are carried out to compare the pros and cones of these approaches when used in projection acquisition. The results show that projections acquired with analytic and vector methods are rigorous for regular and homogeneous objects, and projections acquired with discrete methods are acceptable for irregular and inhomogeneous objects in image reconstruction.

Key words: interpolation, projection, simulation, image reconstruction