X-ray detector directly be converted with photon counting spatial detector elements and method for keeping of the x-ray detector

摘要

A method for keeping of at least one detector element (1, 1.1 – 1.20) of an x-ray detector of a ct - system (c1), wherein the at least one detector element (1, 1.1 – 1.20) has a sensor material (2), which directly into a radiation incident photons in the sensor material (2) freely movable charge (i) converts and wherein, with the aid of a first circuit arrangement, in particular an asic (6), the number of the incident photons based on predetermined energy ranges, in particular for imaging, is determined, and wherein the sensor material (2) as a function of an incident radiation intensity a varying part of the entire electrical power of the at least one detector element (1, 1.1 – 1.20) is generated, characterized in that the entire electrical power of the at least one detector element (1, 1.1 – 1.20) is kept constant.