γ光子延时加权定位方法的研究

lnvestigation on the Delay Weighting Method for the Position Estimation of Gamma Photon

本文提出了一种单光子延时加权定位方法及其实现方案．现有的核医学影象设备的成像原理都是先对单光子进行定位，再经过长时间的曝光来实现．因此，单光子定位方法的性能直接影响成像的质量．本文推导了延时加权定位方法的空间编码和空间解码原理，为延时加权定位方法的数字化、集成化、小型化和模块化提供了理论依据，也为新型核医学影像设备的最终实现提供了方案．

This paper has proposed a new delay weighting method for estimating the position of gamma photon and its implementation.The conventional nuclear medical imaging of γ camera is realized through the es timation of single photon position and need a long the for exposition.Thus,the performance of the photon posi tion estimation should affect the quality of nuclear medical image.This paper presents the principle of space code/decode of delay weighting method,which provides the base for the digitization,miniaturization,modulariza tion and integration of the implementation of nuclear medical imaging devices.