公开(公告)号：US20140061483A1

公开(公告)日：2014-03-06

申请号：US13846443

申请日：2013-03-18

申请人： NATIONAL INSTITUTE OF RADIOLOGICAL SCIENCES

发明人： Eiji YOSHIDA ,  Taiga YAMAYA

IPC分类号： G01T1/164

CPC分类号： G01T1/164 ,  G01T1/1647 ,  G01T1/2985

摘要： In a coincidence determination of a PET device, the PET device uses a scintillator of radioactive isotope containing background noise due to intrinsic radioactivity as a radiation detector. The PET device counts a pair of annihilation radiations that is assumed to occur from a same nuclide. The annihilation radiations are detected within a predetermined coincidence time window by a plurality of radiation detectors. The method includes determining a coincidence with a wide energy window that allows detecting the background noise due to intrinsic radioactivity as multiple coincidences; removing the multiple coincidences; and using an energy window narrower than the wide energy window to limit a coincidence event to a coincidence event in a photopeak from a positron nuclide only.

摘要翻译： 在PET装置的重合判定中，PET装置使用由于内在放射性而含有背景噪声的放射性同位素的闪烁体作为放射线检测器。 PET装置计算出假定从同一个核素发生的一对湮灭辐射。 通过多个辐射检测器在预定的重合时间窗内检测湮灭辐射。 该方法包括确定与宽能量窗口的一致性，其允许将由于固有放射性的背景噪声检测为多重重合; 消除多重巧合; 并且使用比宽能窗口窄的能量窗口，以将符合事件限制在仅来自正电子核素的光峰中的重合事件。