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Updated: Jun 28, 2025

Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
Published on: June 19, 2018
High-energy X-ray diffraction experiment employing a compact synchrotron X-ray source based on inverse Compton
Johannes Melcher1, Martin Dierolf1, Benedikt Günther1
1Chair of Biomedical Physics, Physics Department, TUM School of Natural Sciences, Technical University of Munich, 85748 Garching, Germany; Munich Institute of Biomedical Engineering, Technical University of Munich, Boltzmannstr. 11, 85748 Garching, Germany.
High-energy X-ray diffraction (XRD) using an Inverse Compton X-ray source (ICS) enables detailed analysis of mineralogical samples, like kidney stones, even within soft tissue. This advanced technique offers precise material characterization in laboratory settings.
Area of Science:
- Materials Science
- Physics
- Medical Imaging
Background:
- Laboratory X-ray diffraction (XRD) typically uses low X-ray energies (5–22 keV) with limited K-line bandwidths for crystal structure analysis.
- Inverse Compton X-ray sources (ICS) offer brilliant, energy-tunable, and partially coherent X-rays, presenting an opportunity for high-energy XRD in labs.
Purpose of the Study:
- To demonstrate high-energy XRD using an ICS for analyzing mineralogical samples within soft tissue.
- To validate the performance of ICSs for XRD by comparing experimental data with theoretical calculations.
- To investigate and correct for the influence of surrounding soft tissue on XRD patterns.
Main Methods:
- Utilized an Inverse Compton X-ray source (ICS) for high-energy X-ray diffraction (XRD).
- Analyzed strongly absorbing mineralogical samples (two types of kidney stones) embedded in soft tissue.
- Performed quantitative comparison between measured XRD patterns and calculated expected shapes.
- Developed a correction method for soft tissue contributions to the XRD signal.
Main Results:
- Successfully demonstrated high-energy XRD on mineralogical samples using an ICS.
- Validated the performance of ICSs for XRD through quantitative comparison with theoretical models.
- Quantified the influence of surrounding soft tissue on XRD patterns.
- Introduced a correction method to account for soft tissue interference.
Conclusions:
- Inverse Compton X-ray sources are suitable for high-energy XRD in laboratory settings.
- High-energy XRD with ICS enables precise material analysis of embedded mineralogical samples.
- The developed method effectively corrects for soft tissue interference, improving accuracy.
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