Monte Carlo Simulation for the Design of Industrial Gamma-ray Transmission Tomography
Monte Carlo Simulation for the Design of Industrial Gamma-ray Transmission Tomography
复制标题
工业伽马射线透射断层扫描设计的蒙特卡罗模拟
DOI：
10.15669/pnst.1.263
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
T. Kwon
中科院分区：
文献类型：
--
作者：
Jong;Sung;Jinho Moon;T. Kwon
对大型工业γ射线层析成像扫描系统进行了蒙特卡罗模拟和实验研究。层析成像系统的几何结构具有带有16个固定检测器的移动源。这种几何形状对于大型工业工厂的诊断是有利的。对具有32个视图、16个探测器和不同能量箱的体模进行模拟数据。对模拟数据进行处理，用于图像重建。对模拟数据采用对角标度梯度上升算法进行图像重建。实验在直径78 cm的聚丙烯颗粒填充柱中进行。使用了16个0.5英寸厚、1英寸长的NaI（Tl）圆柱形探测器和20 mCi的137 Cs放射源。实验结果与模拟数据进行了比较。实验结果与Monte Carlo模拟结果基本一致。这一结果表明，蒙特卡罗模拟对工业γ层析成像扫描方法的结果预测是有用的，也为工业γ层析成像系统的设计和现场实验的准备提供了解决方案。
The Monte Carlo simulation and experiment were carried out for a large-scale industrial gamma ray tomographic scanning geometry. The geometry of the tomographic system has a moving source with 16 stationary detectors. This geometry is advantageous for the diagnosis of a large-scale industrial plant. The simulation data was carried out for the phantom with 32 views, 16 detectors, and a different energy bin. The simulation data was processed to be used for image reconstruction. Image reconstruction was performed by a Diagonally-Scaled Gradient-Ascent algorithm for simulation data. Experiments were conducted in a 78 cm diameter column filled with polypropylene grains. Sixteen 0.5-inch-thick and 1 inch long NaI(Tl) cylindrical detectors, and 20 mCi of 137 Cs radioactive source were used. The experimental results were compared to the simulation data. The experimental results were similar to Monte Carlo simulation results. This result showed that the Monte Carlo simulation is useful for predicting the result of the industrial gamma tomographic scan method And it can also give a solution for designing the industrial gamma tomography system and preparing the field experiment.