Moore S K, Hunter W C J, Furenlid L R, Barrett H H
Biomedical Engineering Program, the Department of Radiology and the College of Optical Sciences, University of Arizona, Tucson, AZ 85724 USA.
IEEE Nucl Sci Symp Conf Rec (1997). 2007;5:3691-3694. doi: 10.1109/NSSMIC.2007.4436923. Epub 2007 Oct 26.
We present a simple 3D event position-estimation method using raw list-mode acquisition and maximum-likelihood estimation in a modular gamma camera with a thick (25mm) monolithic scintillation crystal. This method involves measuring 2D calibration scans with a well-collimated 511 keV source and fitting each point to a simple depth-dependent light distribution model. Preliminary results show that angled collimated beams appear properly reconstructed.
我们提出了一种简单的三维事件位置估计方法，该方法在具有厚（25毫米）单片闪烁晶体的模块化伽马相机中使用原始列表模式采集和最大似然估计。此方法包括使用准直良好的511keV源进行二维校准扫描，并将每个点拟合到一个简单的深度相关光分布模型。初步结果表明，倾斜的准直光束能够得到正确重建。
