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1. (WO2018040623) MULTI-GAMMA RAY PHOTON SIMULTANEOUS MEDICINE EMISSION TIME-COINCIDENCE NUCLEAR MEDICINE IMAGING SYSTEM AND METHOD

Pub. No.:    WO/2018/040623    International Application No.:    PCT/CN2017/085404
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Tue May 23 01:59:59 CEST 2017
IPC: G01T 1/161
G01T 1/29
A61B 6/03
Applicants: TSINGHUA UNIVERSITY
清华大学
Inventors: LIU, Yaqiang
刘亚强
MA, Tianyu
马天予
FAN, Peng
范鹏
Title: MULTI-GAMMA RAY PHOTON SIMULTANEOUS MEDICINE EMISSION TIME-COINCIDENCE NUCLEAR MEDICINE IMAGING SYSTEM AND METHOD
Abstract:
A multi-gamma ray photon simultaneous medicine emission-based time-coincidence nuclear medicine imaging system and method. The system comprises: multiple detector probes arranged in a non-parallel mode, a time coincidence module (3), and a computer platform (4). Each detector probe comprises a collimator (1) and a gamma ray photon detector (2) with a time measuring function. Multiple gamma ray photons radiated by detection radionuclides within a short time form multiple gamma ray photon coincidence events. According to calculation in the method, a point having the smallest sum of distances of projection lines determined by the multiple gamma ray photon coincidence events is a disintegration position of radionuclides, and the distribution of radionuclides in a living body can be obtained by accumulating a certain number of multi-gamma ray photon coincidence events. The imaging system and method simplify a reconstruction algorithm, improve the signal to noise ratio of reconstructed images, lower the requirement for the total count of gamma ray photons, and reduce the irradiation risk to patients.