Method for PET detector afterglow management

• Main Authors: BIENIOSEK MATTHEW FRANCIS, HARPER BRENT, OLCOTT PETER DEMETRI
• Format: Patent
• Language: Chinese; English
• Published: 05.07.2022
• Subjects: ELECTROTHERAPY; HUMAN NECESSITIES; HYGIENE; MAGNETOTHERAPY; MEDICAL OR VETERINARY SCIENCE; RADIATION THERAPY; ULTRASOUND THERAPY

Disclosed herein are methods and apparatus for acquiring positron emission (or PET) data in the presence of ionizing radiation that causes PET detector afterglow. In one variation, the method includes adjusting a coincidence trigger threshold of a PET detector during a treatment procedure. In one variation, the method includes adjusting a gain factor (e.g., a gain factor for multiplying and/or shifting output (s) of PET detector (s)) used in positron emission data acquisition during a treatment procedure. In some variations, a method for acquiring positron emission data during a radiotherapy procedure includes suspending communication between a PET detector and a signal processor of a controller for a predetermined period of time after emission of a radiation pulse by a linear accelerator. 在此公开了在存在引起PET检测器余辉的电离放射的情况下用于采集正电子发射(或PET)数据的方法和设备。在一个变型中，该方法包括在治疗环节期间调节PET检测器的重合触发阈值。在一个变型中，该方法包括在治疗环节期间调节在正电子发射数据采集中使用的增益因子(例如，用于对(多个)PET检测器的(多个)输出进行乘积和/或移位的增益因子)。在一些变型中，一种用于在放射治疗环节期间获取正电子发射数据的方法包括：在由直线加速器发射出放射脉冲之后，将PET检测