Simple phase extraction in x-ray differential phase contrast imaging
Liu Xin†, , Guo Jin-Chuan, Lei Yao-Hu, Li Ji, Niu Han-Ben
       

Raw intensity measurements of a carbon ball. The positions of G1 are α and α + π in panels (a) and (b), respectively. The line profiles in panels (a) and (b) correspond to the red lines in panels (a) and (b), respectively.