An x-ray computed tomography (CT) simulator based on the Monte CarloN-particle radiation transport computer code (MCNP4C) was developed forsimulation of both fan- and cone-beam CT scanners. A user-friendly interfacerunning under Matlab 6.5.1 creates the scanner geometry at different viewsas MCNP4C’s input file. The full simulation of x-ray tube, phantomand detectors with single-slice, multi-slice and flat detector configurationswas considered. The simulator was validated through comparison ...