A new method for depth of interaction determination in PET detectors
A new method for depth of interaction determination in PET detectors
复制标题
DOI：
10.1088/0031-9155/61/12/4679
复制
发表时间：
2016-06-21
影响因子：
3.5
通讯作者：
Auffray, E.
中科院分区：
文献类型：
--
作者：
Pizzichemi, M.;Stringhini, G.;Auffray, E.
在这项研究中，提出了一种新的方法，用于获得相互作用的深度（DOI）的信息在PET探测器中，基于共享和重定向闪烁光之间的多个探测器，连同衰减的光在晶体的长度。其目的是获得具有单侧读出的连续DOI编码，并且同时不需要发射器和探测器之间的一对一耦合，从而允许开发具有良好空间、能量和定时分辨率的PET扫描仪，同时保持系统的低复杂性。一个原型模块已被生产和其特征在于测试所提出的方法，耦合LYSO闪烁体矩阵的商业SiPMs阵列。阵列中的所有晶体都获得了良好的晶体分离，由于去抛光引起的光损失可以忽略不计，能量分辨率平均为12.7%FWHM。在15 mm长的晶体上，DOI的平均分辨率为4.1 mm FWHM，初步符合时间分辨率估计为353 ps FWHM。
A new method for obtaining depth of interaction (DOI) information in PET detectors is presented in this study, based on sharing and redirection of scintillation light among multiple detectors, together with attenuation of light over the length of the crystals. The aim is to obtain continuous DOI encoding with single side readout, and at the same time without the need for one-to-one coupling between scintillators and detectors, allowing the development of a PET scanner with good spatial, energy and timing resolutions while keeping the complexity of the system low. A prototype module has been produced and characterized to test the proposed method, coupling a LYSO scintillator matrix to a commercial SiPMs array. Excellent crystal separation is obtained for all the scintillators in the array, light loss due to depolishing is found to be negligible, energy resolution is shown to be on average 12.7% FWHM. The mean DOI resolution achieved is 4.1 mm FWHM on a 15 mm long crystal and preliminary coincidence time resolution was estimated in 353 ps FWHM.