Patent ID: 7570731
Filing Date: 2009-08-04
Classification: A61B,G06T,Y10S

Abstract:
1. An imaging method, comprising the following steps: generating rays penetrating an object in different directions by means of a radiation source; acquisition of measured values, which depend on the intensity of the rays after penetration of the object, with a detector unit, which has a detector area divided into detector elements, wherein each detector element records a measured value; and reconstruction of an object image by back projection of back projection values that depend on measured values; wherein, the object image is divided into overlapping, quasi-spherically symmetric image segments, each one of which is defined by an image value and a quasi-spherically symmetric base function, the back projection values are added in proportions to the image values during the back projection, and the proportion of a back projection value, which is added to an image value during the back projection, is dependent on a proportionality factor, which is equal to the average value of the line integrals of the base function belonging to the respective image value along those rays that have generated the measured value on which the respective back projection value is dependent.