X-ray Phase Contrast Imaging and Simulation in Near Field

Near field inline phase contrast has obvious effect on the boundary of different parts. Its intensity distribution is directly related with the Laplace form of phase distribution. In near field imaging, detecting distance makes a significant role. The Fresnel diffraction one dimension image on several different samples was simulated, and the best detecting distance was obtained. On the above basis, two dimension samples were simulated and the conclusion was verified.