The feasibility of Positron Annihilation Interaction-Transmission Imaging (PAITI), a novel 2D imaging modality based on positron annihilation photons, has been demonstrated through theoretical analysis and GATE Monte Carlo simulations. This system consists of two pixelated detectors on opposite sides of a point-like positron source. The object under investigation is positioned between the source and one of the detectors. By analyzing singles, coincidence, and anticoincidence counts, multiple 2D maps of the medium under investigation can be produced from a single data acquisition, such as the map of the number of occurred interactions, linear attenuation coefficient map, deposited energy map, and electron density map.

中文翻译：

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低剂量多参数成像系统的概念设计：正电子湮灭相互作用透射成像（PAITI）

正电子湮灭相互作用透射成像（PAITI）是一种基于正电子湮没光子的新型二维成像模式，其可行性已通过理论分析和GATE蒙特卡罗模拟得到证明。该系统由位于点状正电子源两侧的两个像素化探测器组成。被调查的物体位于源和探测器之一之间。通过分析单次、符合和反符合计数，可以从单次数据采集中生成所研究介质的多个二维图，例如发生相互作用的数量图、线性衰减系数图、沉积能量图和电子密度图地图。