Patent ID: 6310968
Filing Date: 2001-10-30
Classification: A61B,G01T

Abstract:
A method of ML-EM image reconstruction for use in connection with a diagnostic imaging apparatus that generates projection data comprising:(a) collecting projection data including measured emission projection data;(b) assuming an initial emission map;(c) assuming an initial attenuation map;(d) iteratively updating the emission map and the attenuation map;(e) with each iteration, recalculating the emission map by taking a previous emission map and adjusting it based upon: (i) the measured emission projection data; (ii) a reprojection of the previous emission map which is carried out with a multi-dimensional projection model; and, (iii) a reprojection of the attenuation map; and,(f) with each iteration, recalculating the attenuation map by taking a previous attenuation map and adjusting it based upon: (i) the measured emission projection data; and, (ii) the reprojection of the previous emission map which is carried out with the multi-dimensional projection model.