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Tensor Tomography of Dark Field Scatter using X-ray Interferometry with Bi-prisms
Grant T Gullberg1, Michael Fuller2, Uttam Shrestha3
1Department of Radiology and Biomedical Imaging, University of California San Francisco, 94143-0946 USA (gtgullberg@lbl.gov).
IEEE Nuclear Science Symposium Conference Record. Nuclear Science Symposium
|January 11, 2019
Summary
This study models X-ray interferometry using a Fresnel micro-bi-prism for enhanced soft-tissue imaging. The research develops a method to reconstruct 3D tensor data for improved tissue property analysis.
Area of Science:
- Medical Imaging
- X-ray Optics
- Interferometry
Background:
- X-ray grating-based differential phase-contrast imaging offers superior soft-tissue contrast.
- Current methods struggle with polychromatic performance.
Purpose of the Study:
- To model X-ray interferometry using a Fresnel micro-bi-prism.
- To improve polychromatic performance in bi-prism interferometry for medical imaging.
Main Methods:
- Analytical expression for bi-prism irradiance distribution derived.
- Non-periodic fringe visibility regions identified.
- Method for reconstructing scattering directions developed, inspired by Pfeiffer et al.
Main Results:
- An analytical model for Fresnel micro-bi-prism performance was established.
- Localized, non-periodic fringe visibility regions were characterized.
- A method for 3D tensor field reconstruction from scattering directions was formulated.
Conclusions:
- Bi-prism interferometry shows promise for enhanced X-ray differential phase-contrast imaging.
- The developed reconstruction method enables detailed tissue property analysis.
- Future work will integrate tensor tomographic data for comprehensive tissue characterization.
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