In-line phase contrast imaging using a micro-focus X-ray source

In-line Phase Contrast Imaging using a micro-focus X-ray source enables weakly absorbing specimens to be imaged successfully with X-rays and enhances the visibility of fine scale structure in more strongly absorbing specimens greatly. Getting the intensity on the image plane, we can get the phase contrast of an object by phase retrieval method. We got phase contrast of a black ant in different position and obtained the phase retrieval result by Transport of Intensity Equation method. On the base of edge visibility formula and entropy method, we quantitatively compare different edge visibility results of the images in different position and the differences between original phase contrast image and phase retrieval image.