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1. 发明授权

US5825033A Signal processing method for gamma-ray semiconductor sensor 失效
标题翻译：伽马射线半导体传感器的信号处理方法
公开(公告)号：US5825033A
公开(公告)日：1998-10-20
申请号：US742252
申请日：1996-10-31
申请人： Harrison H. Barrett , Daniel G. Marks , H. Bradford Barber , Joshua D. Eskin
发明人： Harrison H. Barrett , Daniel G. Marks , H. Bradford Barber , Joshua D. Eskin
IPC分类号： H01L27/146 , G01T1/24
CPC分类号： H01L27/14658
摘要： A CdZnTe detector array with pixel electrodes indium-bump-bonded to a multiplexer readout circuit. The pixel size is selected so as to minimize the effect of hole trapping while ensuring that all interacting electrons deposit their energy in a designated central pixel. The readout is carried out either when a gamma-ray interaction event occurs or at time intervals likely to produce no more than one event of photon interaction at any given pixel. The readout signal for each pixel is compared to a corresponding threshold signal to identify clusters of adjacent pixels having an above-threshold signal. Then, a central pixel is designated for each cluster, the signals from a predetermined number of pixels in and/or neighboring the cluster are added to produce a cumulative signal, and the cumulative signal is assigned to the designated central pixel. The cumulative signals so produced and the positions of corresponding central pixels are then processed to generate an image of the gamma-ray emitting source. According to other embodiments of the invention, the signals from a predetermined number of pixels in and/or neighboring the clusters are used to estimate spatial coordinates and energy of each interaction event or to estimate the spatial and energy distribution of the fluence of events of gamma-ray interaction with the detector.
摘要翻译：具有像素电极的CdZnTe检测器阵列铟凸块结合到多路复用器读出电路。选择像素尺寸以便最小化空穴捕获的影响，同时确保所有相互作用的电子将其能量沉积在指定的中心像素中。当发生伽马射线相互作用事件时或者在任何给定像素处可能产生不超过一个光子相互作用事件的时间间隔进行读出。将每个像素的读出信号与对应的阈值信号进行比较，以识别具有高于阈值信号的相邻像素的簇。然后，为每个簇指定中心像素，将来自簇内和/或相邻簇中的预定数量像素的信号相加以产生累积信号，并将累积信号分配给指定的中心像素。然后处理如此产生的累积信号和对应的中心像素的位置以产生伽马射线发射源的图像。根据本发明的其它实施例，使用来自群集内和/或相邻群集中的预定数量像素的信号来估计每个交互事件的空间坐标和能量，或者估计伽马事件的能量密度的空间和能量分布与检测器的相互作用。

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