In this Letter, we present a single-shot approach to quantitatively retrieve x-ray absorption and phase shift in grating interferometry. The proposed approach makes use of the energy-resolving capability of x-ray photon-counting detectors. The retrieval method is derived and presented and is tested based on numerical simulations, including photon shot noise. The good agreement between retrieval results and theoretical values confirms the feasibility of the presented approach.
© 2014 Optical Society of America
Original Manuscript: October 31, 2013
Revised Manuscript: January 5, 2014
Manuscript Accepted: January 7, 2014
Published: February 10, 2014
Zhili Wang, Kun Gao, Dajiang Wang, Zhao Wu, Heng Chen, Shenghao Wang, and Ziyu Wu, "Single-shot x-ray phase imaging with grating interferometry and photon-counting detectors," Opt. Lett. 39, 877-879 (2014)