A METHOD FOR CORRECTION OF INEFFICIENCIES OF A SINGLE PHOTON COUNTING DETECTOR SYSTEM AT HIGH PHOTON RATES AND SINGLE PHOTON COUNTING DETECTOR SYSTEM

摘要

It is an objective of the present invention to provide a method for correction of high rate inefficiencies of a single photon counting detector system and single photon counting detector system having this property in order be more precise in terms of photon counting. This objective is achieved according to the present invention by a method and a single photon counting pixel detector (chip or multi chip), comprising: a) a layer of photosensitive material; b) an N x M array of photo-detector diodes arranged in said layer of photosensitive material; each of said photo-detector diodes having a diode output interface; c) a N x M array of readout unit cells, one readout unit cell for each photo-detector diode; d) said readout unit cell comprising an input interface connected to said diode output interface, a high-gain charge to voltage amplifying means and a pixel counter being connected to an output of the high-gain voltage amplifying means, e) a calculation means for integrating the total number of incident photons over a predetermined total exposure time, wherein the total exposure time is split into sub-exposure intervals, wherein distinct rate corrections are applied to the sub-counts of the sub-exposure intervals and then the number of incident photons is calculated by summing the sub-counts which are individually corrected.