Nanobeam X-ray fluorescence and diffraction computed tomography on human bone with a resolution better than 120 nm

J Struct Biol. 2020 Dec 1;212(3):107631. doi: 10.1016/j.jsb.2020.107631. Epub 2020 Sep 25.

Abstract

Studying nanostructured hierarchical materials such as the biomineralized bone is challenging due to their complex 3D structures that call for high spatial resolution. One route to study such materials is X-ray powder diffraction computed tomography (XRD-CT) that reveals the 3D distribution of crystalline phases and X-ray fluorescence computed tomography (XRF-CT) that provides element distributions. However, the spatial resolution of XRD-CT has thus far been limited. Here we demonstrate better than 120 nm 3D resolution on human bone in XRD-CT and XRF-CT measured simultaneously using X-ray nanobeams. The results pave the way for nanoscale 3D characterization of nanocrystalline composites like bone at unprecedented detail.

Keywords: Bone; Multilayer laue lenses; Tomography; X-ray fluorescence computed tomography (XRF-CT); X-ray nanobeams; X-ray powder diffraction computed tomography (XRD-CT).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bone and Bones / physiology*
  • Fluorescence
  • Humans
  • Nanostructures / chemistry*
  • Tomography, X-Ray Computed / methods*
  • X-Ray Diffraction / methods*
  • X-Rays