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首页> 外文期刊>Optical engineering >Simulation study of a depth-encoding positron emission tomography detector inserting horizontal-striped glass between crystal layers
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Simulation study of a depth-encoding positron emission tomography detector inserting horizontal-striped glass between crystal layers

机译：在晶体层之间插入水平条纹玻璃的深度编码正电子发射断层扫描探测器的仿真研究

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This study introduces a depth-encoding positron emission tomography (PET) detector inserting a horizontal-striped glass between the pixilated scintillation crystal layers. This design allows light spreading so that scintillation photons can travel only through the X direction and allows alteration in the light distribution so that it can generate a unique pattern diagram of the two-dimensional (2-D) flood histogram that identifies depth position as well as X-Y position of γ-ray interaction. A Monte Carlo simulation was conducted for the assessment of the depth of interaction (DOI)-PET detector. The traced light distribution for each event was converted into the 2-D flood histogram. Light loss caused by inserting the horizontal-striped glass between the crystal layers was estimated. Applicable weighting factors were examined for each DOI-PET detector. No considerable degradation of light loss was observed. The flood histogram, without overlapping of each crystal position, can be generated for the DOI detector based on each crystal block by inserting the horizontal-striped glass with a thickness of >1 mm and the modified resistive charge division networks with applicable weighting factors. This study demonstrated that the proposed DOI-PET detector can extract the three-dimensional γ-ray interaction position without considerable performance degradations of the PET detector from the 2-D flood histogram.
机译：这项研究介绍了一种深度编码正电子发射断层扫描（PET）检测器，该检测器在像素化闪烁晶体层之间插入了水平条纹玻璃。这种设计允许光散布，使得闪烁光子只能通过X方向传播，并且可以改变光的分布，从而可以生成二维（2-D）泛洪直方图的唯一模式图，该模式图也可以识别深度位置作为γ射线相互作用的XY位置。进行了蒙特卡洛模拟，以评估相互作用深度（DOI）-PET检测器。将每个事件的跟踪光分布转换为二维洪水直方图。估计由于在晶体层之间插入水平条纹玻璃而引起的光损失。检查每个DOI-PET检测器的适用加权因子。没有观察到光损失的显着降低。通过插入厚度> 1 mm的水平条纹玻璃和具有适用权重因子的改进的电阻电荷划分网络，可以为每个DOI检测器基于每个晶体块生成不重叠每个晶体位置的泛洪直方图。这项研究表明，提出的DOI-PET检测器可以从二维洪水直方图中提取三维γ射线相互作用位置，而不会大幅降低PET检测器的性能。

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