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) The SNRs due to photon statistics versus incident photon number: absorption (a), refraction (b), and scattering (c) images.