Theory and method of X-ray grating phase contrast imaging
X射线光栅相位成像的理论和方法

In this work,we make a theoretical analysis of X-ray grating phase contrast imaging (XGPCI) and give an equation to show the relationship between the transmittance and the relative shift of the two gratings,which was named as the shift curve.According to this equation,we develop a new method to retrieve phase information from the experimental data in theory.Finally,we analyze the influence of the experimental setup to the resolution of the image.