论文标题
带有单网格X射线成像的定向深色场检索
Directional dark-field retrieval with single-grid x-ray imaging
论文作者
论文摘要
定向深色场成像是一种新兴的X射线模态，对从子像素样品微结构中未解决的各向异性散射敏感。单网格成像设置可用于通过查看样品上投影的网格图案的变化来捕获暗场图像。通过为实验创建分析模型，我们开发了一种单格的定向深色场检索算法，该算法可以提取诸如主要的散射方向，以及半毛线和-Minor散射角度。我们表明，即使在存在高图像噪声的情况下，该方法也有效，可以进行低剂量和时间序列成像。
Directional dark-field imaging is an emerging x-ray modality that is sensitive to unresolved anisotropic scattering from sub-pixel sample microstructures. A single-grid imaging set-up can be used to capture dark-field images by looking at changes in a grid pattern projected upon the sample. By creating analytical models for the experiment, we have developed a single-grid directional dark field retrieval algorithm that can extract dark-field parameters such as the dominant scattering direction, and the semi-major and -minor scattering angles. We show that this method is effective even in the presence of high image noise, allowing for low dose and time sequence imaging.
