Abstract
X-ray diffraction can be used as the signal for tomographic reconstruction and provides a cross-sectional map of the crystallographic phases and related quantities. Diffraction tomography has been developed over the last decade using monochromatic x-radiation and an area detector. This paper reports tomographic reconstruction with polychromatic radiation and an energy sensitive detector array. The energy dispersive diffraction (EDD) geometry, the instrumentation and the reconstruction process are described and related to the expected resolution. Results of EDD tomography are presented for two samples containing hydroxyapatite (hAp). The first is a 3D-printed sample with an elliptical crosssection and contains synthetic hAp. The second is a human second metacarpal bone from the Roman-era cemetery at Ancaster, UK and contains bio-hAp which may have been altered by diagenesis. Reconstructions with different diffraction peaks are compared. Prospects for future EDD tomography are also discussed.
Original language | English (US) |
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Title of host publication | Developments in X-Ray Tomography XI |
Editors | Ge Wang, Bert Muller |
Publisher | SPIE |
ISBN (Electronic) | 9781510612396 |
DOIs | |
State | Published - 2017 |
Event | Developments in X-Ray Tomography XI 2017 - San Diego, United States Duration: Aug 8 2017 → Aug 10 2017 |
Publication series
Name | Proceedings of SPIE - The International Society for Optical Engineering |
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Volume | 10391 |
ISSN (Print) | 0277-786X |
ISSN (Electronic) | 1996-756X |
Other
Other | Developments in X-Ray Tomography XI 2017 |
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Country/Territory | United States |
City | San Diego |
Period | 8/8/17 → 8/10/17 |
Funding
We thank Adam Jakus, formerly of Northwestern University, for printing the elliptical hAp phantom. We also thank Simon Mays of Historic England, Portsmouth UK for arranging the loan of the Mc2 sample. Use of the Advanced Photon Source was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
Keywords
- Bone
- Diffraction tomography
- Energy dispersive diffraction
- Hydroxyapatite
- Tomography
- X-ray diffraction
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering