Journal ArticleDOI
Energy-dispersive X-ray diffraction tomography
G Harding,M Newton,J Kosanetzky +2 more
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TLDR
In this paper, an energy-dispersive X-ray diffraction tomography (EXDT) was proposed to measure the properties of small voxels of an extended object to be measured in vivo.Abstract:
A novel tomographic imaging technique is described based on the energy analysis, at fixed angle, of coherent X-ray scatter excited in an object by polychromatic radiation. The authors term their technique 'energy-dispersive X-ray diffraction tomography' (EXDT). It permits the X-ray diffraction properties of small voxels of an extended object to be measured in vivo. Tomographic information is obtained directly without the need to reconstruct from projections. EXDT images of a simple test object comprising water and various plastic materials are presented to illustrate the feasibility of the technique. Potential applications of EXDT in bone imaging are discussed.read more
Citations
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Journal ArticleDOI
Quantitative X-ray tomography
Eric Maire,Philip J. Withers +1 more
TL;DR: In this paper, the authors review the current state of the art as CT transforms from a qualitative diagnostic tool to a quantitative one, including the use of iterative reconstruction strategies suited to specific segmentation tasks and emerging methods that provide more insight than conventional attenuation based tomography.
Journal ArticleDOI
Measurement of small-angle photon scattering for some breast tissues and tissue substitute materials
TL;DR: P peaks in the forward scattering distributions have been demonstrated for 19 samples of breast tissue and three tissue substitute materials using a position-sensitive photon detector and a 60 kVp x-ray source and only small differences were found between carcinomas and fibroglandular tissues.
Journal ArticleDOI
Coherent X-ray scatter imaging and its applications in biomedical science and industry
G. Harding,B. Schreiber +1 more
TL;DR: The utility of coherent scatter imaging is demonstrated with examples drawn from the fields of tissue characterization in the medical environment, explosives detection for airport security screening purposes and the detection of narcotics.
Journal ArticleDOI
Pencil beam coded aperture x-ray scatter imaging
Kenneth P. MacCabe,Kalyani Krishnamurthy,Amarpreet S. Chawla,Daniel L. Marks,Ehsan Samei,David J. Brady +5 more
TL;DR: In this article, coded aperture x-ray scatter imaging was used to interrogate scattering targets with a pencil beam using a flat-panel scintillation detector, and the results demonstrate that a single snapshot can be used to estimate scattering properties along an xray beam, and serve as a foundation for volumetric imaging of scattering objects.
Patent
X-ray diffraction-based scanning system
TL;DR: In this paper, an x-ray diffraction-based scanning method and system is described, which includes screening for a particular substance in a container at a transportation center using a flat panel detector having a photoconductor xray conversion layer to detect x-rays diffracted by a particular substances in the container.
References
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Journal ArticleDOI
X-ray diffraction computed tomography
TL;DR: The dose and sensitivity of x-ray diffraction CT are compared with those of conventional transmission CT, and possibilities for refinement of the technique by improving the momentum resolution are discussed.
Journal ArticleDOI
Coherent scatter in diagnostic radiology
Paul C. Johns,Martin J. Yaffe +1 more
TL;DR: Coherent scatter is often ignored in diagnostic radiology because its cross section is relatively small, and because it is assumed to be indistinguishable from primary radiation, but single-scatter calculations show that coherently scattered photons diverge sufficiently from the primary ray to degrade image contrast.
Journal ArticleDOI
X-ray diffraction measurements of some plastic materials and body tissues
TL;DR: In this article, the combination of diffractometry with computerized tomography enables spatially resolved imaging of the diffraction properties of extended objects, as described in more detail in a companion article.
Journal ArticleDOI
Elastic scatter computed tomography
G Harding,J Kosanetzky +1 more
TL;DR: A technique is proposed for imaging 2D sections based on measurement of elastic scatter radiation using seven scintillation detectors (BGO) operated in current integration mode to measure radiation falling on the object to be investigated.
Journal ArticleDOI
Status and outlook of coherent-x-ray scatter imaging.
G. Harding,J. Kosanetzky +1 more
TL;DR: An experimental first-generation CT system has been constructed to demonstrate the feasibility of x-ray diffraction CT and the physical background to coherent scattering is described in a simple, classical way, and its importance in conventional radiography is demonstrated by using Monte Carlo analysis.