Journal Article Research Support, Non-U.S. Gov't 3D phase-contrast imaging PPC-SRµCT Review attenuation-contrast imaging chondrocytes cell fibrocartilage layer graphene hierarchical structures high resolution high-resolution imaging intramedullary arteries neurovascular network patella–patellar tendon interface phase-contrast tomography post-traumatic syringomyelia propagation-based synchrotron radiation microtomography roughness spinal cord spinal cord injury superhydrophobicity synchrotron radiation imaging three-dimensional three-dimensional microstructure virtual slices wettability