An Improved Algorithm for Reprojecting Rays through Pixel Images

摘要: It is often desired to calculate line integrals through a field of reconstructed CT density pixels for the purpose improving image quality. Two algorithms widely published and discussed in past are known either degrade spatial resolution or generate errors results due discontinuous "square pixel" modeling image. An algorithm described, based on linear interpolation between pixels, which provides superior accuracy without unnecessary loss resolution. was tested simulated data head section narrow Gaussian distribution. The experimental demonstrated improved performance. method expected prove useful many types post-reconstruction processing, including beam hardening, missing data, noise supression algorithms.