Opt Express. 2022 Jan 31;30(3):4302-4311. doi: 10.1364/OE.438876.
We present a graphical tool that we call a "confidence map". It allows to evaluate locally the quality of a phase image retrieved from the measurement of its gradients. The tool is primarily used to alert the observer to the presence of artifacts that could affect his interpretation of the image. It can also be used to optimize a phase imager since it associates a cause with the creation of each artifact: dislocation, under-sampling and noise. An illustration of the use of the confidence map tool is presented, based on a microfocus X-ray tube using multilateral shearing interferometry, a gradient based phase contrast technique employing a single 2D-grating.
我们提出了一个图形工具，称为“置信图”。它可以局部评估从梯度测量中获取的相位图像的质量。该工具主要用于提醒观察者注意可能影响他对图像解释的伪影的存在。它还可以用于优化相衬成像仪，因为它将原因与每个伪影的产生联系起来：离位、欠采样和噪声。本文介绍了置信图工具的使用示例，该示例基于使用多边剪切干涉术的微焦点 X 射线管，这是一种基于梯度的相位对比技术，采用单个二维光栅。
