论文标题
快速隐式扩散的深色场检索，用于单膜X射线成像
Fast implicit diffusive dark-field retrieval for single-exposure, single-mask x-ray imaging
论文作者
论文摘要
互补的传统和X射线射线照相术，由于物体内的空间未固定纹理，暗场成像已成为可视化扩散散射信号的核心。迄今为止，大多数扩散的漆田检索方法要求以较高辐射剂量的成本或大量的计算记忆和时间来获取多个图像。在这项工作中，提出了一种简单的X射线扩散暗场检索方法，适用于任何单掩模成像设置，只有一次曝光样本。该方法基于一种几何和扩散的反向流守保护模型，是隐式且非著作的。这种数值快速的方法应用于使用随机掩码和网格掩码获得的实验X射线图像，从而提供高质量的重建，在存在噪声的情况下非常稳定。该方法对于具有低通量源的高速成像和/或成像应该很有用。
Complementary to conventional and phase X-ray radiography, dark-field imaging has become central in visualizing diffusive scattering signal due to the spatially-unresolved texture within an object. To date most diffusive-dark-field retrieval methods require either the acquisition of multiple images at the cost of higher radiation dose or significant amounts of computational memory and time. In this work, a simple method of X-ray diffusive dark-field retrieval is presented, applicable to any single-mask imaging setup, with only one exposure of the sample. The approach, which is based on a model of geometric and diffusive reverse-flow conservation, is implicit and non-iterative. This numerically fast methodology is applied to experimental X-ray images acquired using both a random mask and a grid mask, giving high quality reconstructions that are very stable in the presence of noise. The method should be useful for high-speed imaging and/or imaging with low-flux sources.
