Sandborg M, Dance D R, Persliden J, Carlsson G A
Department of Radiation Physics, Faculty of Health Sciences, Linköping University, Sweden.
Comput Methods Programs Biomed. 1994 Mar;42(3):167-80. doi: 10.1016/0169-2607(94)90127-9.
A Monte Carlo computer program has been developed for the simulation of X-ray photon transport in diagnostic X-ray examinations. The simulation takes account of the incident photon energy spectrum and includes a phantom (representing the patient), an anti-scatter grid and an image receptor. The primary objective for developing the program was to study and optimise the design of anti-scatter grids. The program estimates image quality in terms of contrast and signal-to-noise ratio, and radiation risk in terms of mean absorbed dose in the patient. It therefore serves as a tool for the optimisation of the radiographic procedure. A description is given of the program and the variance-reduction techniques used. The computational method was validated by comparison with measurements and other Monte Carlo simulations.
已开发出一种蒙特卡罗计算机程序，用于模拟诊断性X射线检查中的X射线光子传输。该模拟考虑了入射光子能谱，并包括一个体模（代表患者）、一个防散射格栅和一个图像接收器。开发该程序的主要目的是研究和优化防散射格栅的设计。该程序根据对比度和信噪比来估计图像质量，并根据患者的平均吸收剂量来估计辐射风险。因此，它可作为优化射线照相程序的工具。文中给出了该程序及所采用的方差减少技术的描述。通过与测量结果和其他蒙特卡罗模拟进行比较，验证了计算方法的有效性。
