An integral phase contrast modulation transfer function for X-ray phase contrast imaging

Based on the partially coherent optical theory, an integral phase contrast modulation transfer function model is established for X-ray phase contrast imaging system, the model can be used to study the impact of X-ray source size on the X-ray phase contrast imaging system. Then, with the help of simulation and calculation, we give a comprehensive analysis about the influence of the X-ray source size on the overall phase contrast imaging system, Finally, The experimental results are given out to demonstrate its application.