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Imaging system for adaptive sustained current compensation for photon counting detector and adaptive sustained current compensation method
Imaging system for adaptive sustained current compensation for photon counting detector and adaptive sustained current compensation method
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机译:光子计数检测器的自适应持续电流补偿成像系统及自适应持续电流补偿方法
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摘要
An imaging system (100) includes a direct conversion detector pixel (111) that detects radiation traversing an examination region and generates an electrical signal indicative thereof, wherein the signal includes a persistent current, which is produced by a direct conversion material of the pixel and which shifts a level of the signal. A persistent current estimator (116) estimates the persistent current and generates a compensation signal based on the estimate. A pre-amplifier (112) receives the signal and the compensation signal, wherein the compensation signal substantially cancels the persistent current, producing a persistent current compensated signal, and that amplifies the compensated signal, generating an amplified compensated signal. A shaper (114) generates a pulse indicative of energy of the radiation illuminating the direct conversion material based on the amplified compensated signal.
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