γ图像重构放射源三维分布的物理模型设计

Physical model design of radioactive 3D distribution reconstruction using 2D gamma image

快速测定放射性物质污染的位置、分布、剂量对核安全有重要意义。γ相机成像是快速测定核污染位置二维图像的主要手段,用二维图像重构核污染位置三维分布是一种实现快速测定核污染位置、分布的主要技术。通过对γ相机成像过程进行研究,建立了放射源三维分布重构对应的物理模型,并在ML-EM重建算法下得到基本正确的结果。

Quick identification of the location, distribution and quantity of radioactivity is of great interest in nuclear safety. Gamma camera is mainly used to acquire two dimensions radioactive images. Radioactive 3D distribution reconstruction using 2D image is a promising technique to identify radioactive location and distribution. In this paper, we propose a physical model in radioactive 3D distribution reconstruction after studying gamma camera imaging process. The model was validated by ML-EM reconstruction method.