Patent ID: 7042974

Claim:
A method for repetitively reconstructing computerized tomographic (CT) images of an object, comprising the steps of: a) scanning the object with a CT imaging system to acquire views that include measured projections of the object; and b) applying an iterative algorithm to minimize errors between the measured projections of the object and reprojections of a reconstructed CT image, comprising the steps of: b1) acquiring measured projections of a computerized tomoqraphic (CT) image; b2) computing projection errors from the measured projections minus computed projections of a reconstructed CT image; b3) constructing an image of the projection errors; b4) reprojecting the image of the projection errors; b5) updating the reconstructed CT image; b6) reprojecting the reconstructed CT image; b7) testing for convergence of the projection errors as they are minimized; b8) iteratively performing steps b2–b7, until the step of testing for convergence is satisfied; and b9) obtaining a refined and reconstructed CT image from the reconstructed CT image that had been updated.