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Proceedings Paper

X-ray vector radiography of a human hand
Author(s): Christoph Jud; Eva Braig; Martin Dierolf; Elena Eggl; Benedikt Günther; Klaus Achterhold; Bernhard Gleich; Ernst Rummeny; Peter Noël; Franz Pfeiffer; Daniela Münzel
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Paper Abstract

Grating based x-ray phase-contrast reveals differential phase-contrast (DPC) and dark-field contrast (DFC) on top of the conventional absorption image. X-ray vector radiography (XVR) exploits the directional dependence of the DFC and yields the mean scattering strength, the degree of anisotropy and the orientation of scattering structures by combining several DFC-projections. Here, we perform an XVR of an ex vivo human hand specimen. Conventional attenuation images have a good contrast between the bones and the surrounding soft tissue. Within the bones, trabecular structures are visible. However, XVR detects subtler differences within the trabecular structure: there is isotropic scattering in the extremities of the phalanx in contrast to anisotropic scattering in its body. The orientation changes as well from relatively random in the extremities to an alignment along the longitudinal trabecular orientation in the body. In the other bones measured, a similar behavior was found. These findings indicate a deeper insight into the anatomical configuration using XVR compared to conventional radiography. Since microfractures cause a discontinuous trabecular structure, XVR could help to detect so-called radiographically occult fractures of the trabecular bones.

Paper Details

Date Published: 9 March 2017
PDF: 6 pages
Proc. SPIE 10132, Medical Imaging 2017: Physics of Medical Imaging, 101325U (9 March 2017); doi: 10.1117/12.2255595
Show Author Affiliations
Christoph Jud, Technische Univ. München (Germany)
Eva Braig, Technische Univ. München (Germany)
Klinikum rechts der Isar der Technischen Univ. München (Germany)
Martin Dierolf, Technische Univ. München (Germany)
Elena Eggl, Technische Univ. München (Germany)
Benedikt Günther, Technische Univ. München (Germany)
Max-Plank-Institut für Quantenoptik (Germany)
Klaus Achterhold, Technische Univ. München (Germany)
Bernhard Gleich, Technische Univ. München (Germany)
Ernst Rummeny, Klinikum rechts der Isar der Technischen Univ. München (Germany)
Peter Noël, Klinikum rechts der Isar der Technischen Univ. München (Germany)
Franz Pfeiffer, Technische Univ. München (Germany)
Klinikum rechts der Isar der Technischen Univ. München (Germany)
Daniela Münzel, Klinikum rechts der Isar der Technischen Univ. München (Germany)


Published in SPIE Proceedings Vol. 10132:
Medical Imaging 2017: Physics of Medical Imaging
Thomas G. Flohr; Joseph Y. Lo; Taly Gilat Schmidt, Editor(s)

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