论文标题
基于边缘照明的蒙特卡洛模拟的虚拟光栅方法基于边缘照明的X射线相对比成像
Virtual grating approach for Monte Carlo simulations of edge illumination-based x-ray phase contrast imaging
论文作者
论文摘要
新的X射线相对比成像设置的设计通常依赖于蒙特卡洛模拟前瞻性参数研究。已知蒙特卡洛模拟是准确但耗时的，导致较长的模拟时间，尤其是在需要许多参数变化时。当然，依靠吸收面具或光栅的成像方法是这种情况，具有各种可调的特性，例如螺距，孔径大小和厚度。在这项工作中，我们提出了克服这一限制的虚拟光栅方法。通过用虚拟光栅替换仿真中的光栅，可以在模拟后更改光栅的参数，从而大大减少整个仿真时间。该方法通过与显式光栅模拟进行比较，然后是代表性演示案例。
The design of new x-ray phase contrast imaging setups often relies on Monte Carlo simulations for prospective parameter studies. Monte Carlo simulations are known to be accurate but time consuming, leading to long simulation times, especially when many parameter variations are required. This is certainly the case for imaging methods relying on absorbing masks or gratings, with various tunable properties, such as pitch, aperture size, and thickness. In this work, we present the virtual grating approach to overcome this limitation. By replacing the gratings in the simulation with virtual gratings, the parameters of the gratings can be changed after the simulation, thereby significantly reducing the overall simulation time. The method is validated by comparison to explicit grating simulations, followed by representative demonstration cases.
