Journal Article Research Support, Non-U.S. Gov't Evaluation Study Fresnel zone plate Research Support, U.S. Gov't, Non-P.H.S. Sensor3D model U-Net model X-ray nanotomography X-ray optics Zernike phase contrast computer-aided image segmentation deep learning diffraction efficiency double-crystal monochromator grating interferometry heat bump lacuna-canalicular network microfocus X-ray source wavefront characterization