Journal Article nanotomography Zernike phase contrast full-field X-ray microscopy 3D test pattern Research Support, Non-U.S. Gov't Sensor3D model TXM U-Net model X-ray microscopy X-ray nanotomography computer-aided image segmentation deep learning denoising dual beam configuration full-field transmission X-ray microscopy holography holotomography image quality in situ experiments lacuna-canalicular network machine learning multibeams nanoporous gold near-field holography near-field ptychography phase contrast photonic glass realignment of projections sample-stage movement