Noise analysis of grating-based x-ray differential phase-contrast imaging with angular signal radiography

Faiz Wali¹, Bao Yuan², Gao Kun^{1, †}, Wu Zhao¹, Wei Chen-Xi¹, Zan Gui-Bin¹, Zhu Pei-Ping^{3, ‡}, Tian Yang-Chao^{1, §}

(color online) Schematic setup of GBPCI. (a) Periodic interference pattern of G1 is formed in the plane of G2 through Talbot self-imaging; (b) plot of shifting curve as a function of the grating position for detector pixel over one period of G2.