International Journal of Biomedical Imaging 
Volume 2008 (2008), Article ID 827152, 8 pages
doi:10.1155/2008/827152
Research Article

X-Ray Phase-Contrast Imaging with Three 2D Gratings

Ming Jiang,1,2 Christopher Lee Wyatt,2,3 and Ge Wang2,3

 1Laboratory of Mathematics and Applied Mathematics (LMAM), School of Mathematical Sciences, Peking University, Beijing 100871, China
2Biomedical Imaging Division, VT-WFU School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
3Electrical and Computer Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
Received 14 June 2007; Accepted 15 December 2007

Recommended by Yibin Zheng

Abstract

X-ray imaging is of paramount importance for clinical and preclinical imaging but it is fundamentally restricted by the attenuation-based contrast mechanism, which has remained essentially the same since Roentgen's discovery a century ago. Recently, based on the Talbot effect, groundbreaking work was reported using 1D gratings for X-ray phase-contrast imaging with a hospital-grade X-ray tube instead of a synchrotron or microfocused source. In this paper, we report an extension using 2D gratings that reduces the imaging time and increases the accuracy and robustness of phase retrieval compared to current grating-based phase-contrast techniques. Feasibility is demonstrated via numerical simulation.