Patent ID: 6631285
Filing Date: 2003-10-07
Classification: A61B,G06T,Y10S

Abstract:
A nuclear medical imaging apparatus comprising:a receiving region wherein an associated object is received; a radiation detector having a side which faces the receiving region, the detector including, a collimator fabricated from radiation attenuative material arranged on the detector side facing the receiving region, the collimator including a plurality of spaced apart slats, and an essentially linear array of detecting elements, the detecting elements being disposed between the slats on the detector side facing the receiving region; and an image reconstruction processor which converts projection data acquired by the detector into an image representation, the image reconstruction processor including, a memory storing memory contents, an inverse Radon transform preconditioning operator P, a fast slat detector projection operator S that includes a weighted combination of a plurality of Radon transform operators, and an iterative loop operator that corrects a 1/r dependence of the projection data by applying the preconditioning operator P and the projection operator S to the memory contents to calculate updated memory contents.