Phase-contrast microtomography using an X-ray interferometer having a 40-$\mu$m analyzer

Phase-contrast X-ray tomographic experiment using a triple Laue-case (LLL) interferometer having a 40-$\mu$m lamella which was fabricated to improve spatial resolution, was carried out using undulator X-rays at SPring-8, Japan. Three-dimensional images mapping the refractive index were measured for various animal tissues. Comparing the images with those obtained in previous experiments using conventional LLL interferometers having a 1-mm lamella, improvement in the spatial resolution was demonstrated in that histological structures, such as hepatic lobules in liver and tubules in kidney, were revealed