| 摘要 |
The invention relates to an X-ray detector for detecting X-radiation, as used, in particular, in computer tomographic (CT) systems. The X-ray detector in accordance with the invention is composed of a photo sensor device, which comprises individual detector elements ( 1 ), above which scintillator elements ( 2 ) are disposed. These convert the incident X-ray light ( 6 ) into visible or UV light ( 7 ), which is detected by a photodiode ( 4 ) located on the detector element ( 1 ). In accordance with the invention, a micro-lens ( 3 ), which focuses the light ( 7 ) departing from the scintillator element ( 2 ) onto the photodiode ( 4 ), is disposed between the scintillator element ( 2 ) and the detector element ( 1 ). It is possible, in this manner, to use large areas of the detector element ( 1 ) for further electronic components ( 5 ) outside the photodiode ( 4 ), and, at the same time, to ensure a high DQE (Detection Quantum Efficiency) in that the light ( 7 ) departing from the scintillator element ( 2 ) is virtually fully exploited. The crosstalk from scatter radiation from adjacent detector elements is effectively prevented simultaneously.
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