公开(公告)号：US4582995A

公开(公告)日：1986-04-15

申请号：US621418

申请日：1984-06-18

申请人： Chun B. Lim ,  Richard L. Chaney ,  Roger J. Kump

发明人： Chun B. Lim ,  Richard L. Chaney ,  Roger J. Kump

IPC分类号： G01T1/161 ,  F28F9/00 ,  G01T1/164 ,  G01T1/29 ,  G01T1/166

CPC分类号： G01T1/2985 ,  A61B6/037

摘要： A method for correcting predictable errors in the location of detected scintillation events acquired during emission computed tomography by a rotational scintillation gamma camera system. The method includes calibrating the rotational scintillation camera system and generating a look-up table comprising a set of pairs of x and y offset values, one pair for each viewing angle. The calibration reflects systemic deviations in the location of the rotating camera head detector measured in terms of x and y coordinates in the frame of reference of the detector for a plurality of view angles relative to the geometric ideal expected path. Once a look-up table is generated for a camera system, the detected location of each gamma event is altered in real time by adjusting in the camera head the x,y coordinate location of each event by the x,y offset values previously generated for the corresponding viewing angle associated with the detected event.

摘要翻译： 一种用于校正通过旋转闪烁伽马相机系统在发射计算机断层摄影期间获取的检测到的闪烁事件的位置中的可预测误差的方法。 该方法包括校准旋转闪烁照相机系统并产生包括一组x和y偏移值的查找表，每个视角为一对。 校准反映了相对于几何理想预期路径，在检测器的参考系的x和y坐标上以多个视角测量的旋转相机头检测器的位置的系统偏差。 一旦为摄像机系统生成查找表，通过在摄像头中调整每个事件的x，y坐标位置，先前生成的x，y偏移值，为每个伽马事件检测的位置进行实时改变 与检测到的事件相关联的对应视角。