Estimation of angular sensitivity for X-ray interferometers with multiple phase gratings

TL;DR

This paper introduces a new framework to predict the angular sensitivity of multi-phase grating X-ray interferometers, validated through experiments, enabling optimized DPC imaging for biomedical use.

Contribution

A novel predictive framework for the angular sensitivity of multi-phase grating X-ray interferometers is developed and experimentally validated.

Findings

Predicted sensitivity values match experimental measurements.

The framework allows optimization of DPC imaging performance.

Experimental results confirm the model's accuracy.

Abstract

Recently, X-ray interferometers with more than one phase grating have been developed for differential phase contrast (DPC) imaging. In this study, a novel framework is developed to predict such interferometers' angular sensitivity responses (the minimum detectable refraction angle). Experiments are performed on the dual and triple phase grating interferometers, separately. Measurements show strong consistency with the predicted sensitivity values. Using this new approach, the DPC imaging performance of X-ray interferometers with multiple phase gratings can be further optimized for future biomedical applications.