High resolution, large field of view x-ray differential phase contrast imaging on a compact setup

X-ray grating interferometry is a well established technique to perform differential phase contrast imaging on conventional x-ray tubes. So far, the application of this technique in commercial micro computed tomography scanners has remained a major challenge due to the compact setup geometry. In this letter, we report on the design of a compact imaging setup using a microfocus source. Due to the extreme wave front curvature, the gratings are fabricated on a flexible substrate, enabling precise cylindrical shaping. A laboratory setup and a modified SCANCO mu CT100 scanner have been built, allowing high resolution and large field of view imaging. (C) 2011 American Institute of Physics. [doi:10.1063/1.3618672]