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1. 发明授权

US06858850B2 Method for dynamic stabilization of PET detector gains 失效
标题翻译： PET检测器增益的动态稳定方法
公开(公告)号：US06858850B2
公开(公告)日：2005-02-22
申请号：US10064532
申请日：2002-07-24
申请人： John Jay Williams , Kelly Alan Stonger
发明人： John Jay Williams , Kelly Alan Stonger
IPC分类号： G01T1/164 , G01T1/29
CPC分类号： G01T1/2985 , A61B6/037
摘要： A method and apparatus for calibrating PET PMTs includes conducting a calibration procedure and determining whether a number of photons absorbed by a corresponding crystal exceeds a count threshold. If the threshold is exceeded the steps of conducting a calibration procedure and determining whether a number of photons absorbed by a corresponding crystal exceeds a count threshold would be repeated and if the threshold is not exceeded then the calibration procedure would be ended.
摘要翻译：用于校准PET PMT的方法和装置包括进行校准程序并确定相应晶体吸收的多个光子是否超过计数阈值。如果超过阈值，则将重复进行校准程序并确定由相应晶体吸收的多个光子是否超过计数阈值的步骤，并且如果不超过阈值，则校准过程将结束。

2. 发明授权

US07026621B2 System and method for producing a detector position map 失效
标题翻译：用于产生检测器位置图的系统和方法
公开(公告)号：US07026621B2
公开(公告)日：2006-04-11
申请号：US10668167
申请日：2003-09-24
申请人： Kelly Alan Stonger , John Jay Williams
发明人： Kelly Alan Stonger , John Jay Williams
IPC分类号： G01T1/164
CPC分类号： G01T1/1647
摘要： The invention relates to a system and method for generating a detector position map for an array of detectors. The detector position map comprises a map which converts measured position coordinates from a detection event to the detector in the array which detected the detection event. The method comprises the steps of illuminating an array of detectors with a source of radiation to generate a histogram, the histogram comprising an event count as a function of two dimensions, the two dimensions corresponding to a face of the array of detectors, wherein the histogram comprises a plurality of first peaks; modifying the histogram to comprise a plurality of second peaks, wherein the second peaks have a greater degree of isolation from each other than the first peaks; and for each detector, determining a region on the detector position map which corresponds to the detector, each region being based on a position of one of the second peaks.
摘要翻译：本发明涉及一种用于生成检测器阵列的检测器位置图的系统和方法。检测器位置图包括将测量的位置坐标从检测事件转换到检测到检测事件的阵列中的检测器的映射。该方法包括以辐射源照射检测器阵列以产生直方图的步骤，该直方图包括作为二维的函数的事件计数，两维对应于检测器阵列的面，其中直方图包括多个第一峰; 将所述直方图修改为包括多个第二峰值，其中所述第二峰值具有比所述第一峰值更大程度的彼此隔离度; 并且对于每个检测器，确定对应于检测器的检测器位置图上的区域，每个区域基于第二峰之一的位置。

3. 发明授权

US06624422B2 Method for dynamic stabilization of PET detector gains 失效
标题翻译： PET检测器增益的动态稳定方法
公开(公告)号：US06624422B2
公开(公告)日：2003-09-23
申请号：US09963148
申请日：2001-09-25
申请人： John Jay Williams , Kelly Alan Stonger
发明人： John Jay Williams , Kelly Alan Stonger
IPC分类号： G01T1164
CPC分类号： G01T1/208 , A61B6/037 , G01T1/2985
摘要： A method and apparatus for calibrating PET PMTs, the method including, during a commissioning process, determining gain factors for each crystal in a detector unit that cause the peak energy level in a crystal energy spectrum to be equal to a target value and, during a calibration process, generating energy spectrums for each crystal in the unit, combining the gain factors and crystal spectrums to generate shifted crystal spectrums, combining the shifted spectrums to generate a unit spectrum, identifying the peak unit spectrum energy level and comparing the peak unit level to the target value to generate PMT adjustment levels.
摘要翻译：一种用于校准PET PMT的方法和装置，所述方法包括在调试过程中确定检测器单元中每个晶体的增益因子，其使晶体能谱中的峰值能量等于目标值，并且在校准过程，为单位中的每个晶体生成能谱，结合增益因子和晶体光谱产生漂移的晶体光谱，组合移动的光谱以产生单位光谱，识别峰值单位光谱能级，并将峰值单位水平与目标值生成PMT调整级别。

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