SINGLE PHOTON RADIATION DETECTOR

摘要

The invention relates to a radiation detector (100) that is particularly suited for energy resolved single X-rayphoton detection in a CT scanner. In a preferred embodiment, the detector (100) comprises an array of scintillator elements (S k ) in which incident X-ray photons (X) are converted into bursts of optical photons(hn). Pixels (P k ) associated to the scintillator elements (S k ) determine the numbers of optical photons they receive within predetermined acquisition intervals. These numbers can then be digitally processed to detect single X-rayphotons(X) and to determine their energy. The pixels may particularly be realized by avalanche photodiodes withassociated digitalelectronic circuits for data processing.