Optimization of magnification in a VRX CT scanner

Abstract

Variable resolution x-ray (VRX) CT scanner is a new type of CT that provides high spatial resolution. Because of varying spatial resolution of VRX CT the optimum magnification is different at each incident angle. A theoretical study of optimizing the magnification at each incident angle and its effect on the spatial resolution and the FOV of on an actual VRX CT is presented in this paper. The optimization of magnification greatly increased the spatial resolution of the system but at the cost of reduction in the FOV of the system for incident angles of 90° to 10°. So for these incident angles the tradeoff between the spatial resolution and the FOV of the system must be considered. At incident angles of smaller than 10° the optimization of magnification increased both the FOV and the spatial resolution of the system so is completely profitable at these incident angles. © 2009 Springer-Verlag.