A process for the scattered radiation correction of a ct - system with at least two arranged at offset focus - detector - systems and x-ray - ct - system

摘要

A process for the scattered radiation correction of a ct - system (1) with at least two angularly offset to one another, arranged on a rotatable gantry and simultaneously operated focus - detector - systems each having a focus and a the direct radiation of this focus receiving associated detector (3, 5), wherein:1.1. in each of the at least two focus - detector - systems in an x-ray tube (2, 4) by means of a tube current with a tube voltage x-ray radiation is produced,1.2. to the scan of an object (7) the angularly staggered relative to each other focus - detector - systems the object (7) with the x-ray radiation produced scanning, in that it is a system axle (9) of the ct - system rotate and for a plurality of individual beams in the space absorption values from the measured ratio of the measured radiation intensity for the non-attenuated radiation intensity of the individual beams are determined,1.3. the measured values are subjected to a litter beam correction, and1.4. with the aid of the determined absorption data ct - receptacles of the object (7) can be reconstructed,characterized in that1.5. the radiation intensity of the emitted radiation of each focus - detector - system and of a..