公开(公告)号：KR101041020B1

公开(公告)日：2011-06-13

申请号：KR1020100011816

申请日：2010-02-09

Applicant: 서울대학교산학협력단

Inventor： 이재성 ,  이찬미 ,  권순일 ,  이또우미끼꼬 ,  윤현석 ,  박상근 ,  홍성종 ,  이동수

IPC: A61B6/00

CPC classification number: G01T1/248 ,  G01T1/2018

Abstract: PURPOSE: A system and a method for compensating non-uniformity of a gain of a location sensitivity type multi-anode photomultiplier tube are provided to compensate the non-uniformity of the gain in each anode of the location sensitivity type multi-anode photomultiplier tub by introducing a compensation unit for changing a resistance. CONSTITUTION: A location sensitivity type multi-anode photomultiplier(200) converts a scintillation of an incident gamma ray in a predetermined scintillation crystal(100) to electrons and amplifies a current signal according to each of a plurality of channels. A location detection circuit unit(300) divides the amplified current signal into four current signals to represent a detected location of the gamma ray on the scintillation crystal on the basis of the amplified current signal to the two-dimensional energy distribution. A compensation unit(400) compensates the intensity of the current signal inputted into the location detection circuit unit by changing at least one of a serial variable resistance and a parallel variable resistance. A coordinate production unit(500) receives the four current signals and produces the coordinates of the detected location of the gamma ray on the basis of the current signal having the compensated intensity.

Abstract translation: 目的：提供一种用于补偿位置灵敏度型多阳极光电倍增管增益不均匀性的系统和方法，以补偿位置灵敏度型多阳极光电倍增管的每个阳极的增益不均匀性 引入改变阻力的补偿单位。 构成：位置灵敏度型多阳极光电倍增管（200）将预定闪烁晶体（100）中的入射伽马射线的闪烁转换为电子，并根据多个通道中的每个通道放大电流信号。 位置检测电路单元（300）将放大的电流信号分成四个电流信号，以便根据放大的电流信号将二维能量分布中的伽马射线的检测位置表示在闪烁晶体上。 补偿单元（400）通过改变串行可变电阻和并联可变电阻中的至少一个来补偿输入到位置检测电路单元的电流信号的强度。 坐标产生单元（500）接收四个电流信号，并且基于具有补偿强度的电流信号产生伽马射线的检测位置的坐标。