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Proceedings Paper

Image fusion algorithm for differential phase contrast imaging
Author(s): Ewald Roessl; Thomas Koehler; Udo van Stevendaal; Gerhard Martens; Nik Hauser; Zhentian Wang; Marco Stampanoni
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Paper Abstract

Differential phase-contrast imaging in the x-ray domain provides three physically complementary signals:1, 2 the attenuation, the differential phase-contrast, related to the refractive index, and the dark-field signal, strongly influenced by the total amount of radiation scattered into very small angles. In medical applications, it is of the utmost importance to present to the radiologist all clinically relevant information in as compact a way as possible. Hence, the need arises for a method to combine two or more of the above mentioned signals into one image containing all information relevant for diagnosis. We present an image composition algorithm that fuses the attenuation image and the differential phase contrast image into a composite, final image based on the assumption that the real and imaginary part of the complex refractive index of the sample can be related by a constant scaling factor. The merging is performed in such a way that the composite image is characterized by minimal noise-power at each frequency component.

Paper Details

Date Published: 23 February 2012
PDF: 6 pages
Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 831354 (23 February 2012); doi: 10.1117/12.911255
Show Author Affiliations
Ewald Roessl, Philips Technologie GmbH (Germany)
Thomas Koehler, Philips Technologie GmbH (Germany)
Udo van Stevendaal, Philips Technologie GmbH (Germany)
Gerhard Martens, Philips Technologie GmbH (Germany)
Nik Hauser, Kantonsspital Baden (Switzerland)
Zhentian Wang, Paul Scherrer Institut (Switzerland)
Marco Stampanoni, Paul Scherrer Institut (Switzerland)
Institute for Biomedical Engineering, Univ. and ETH Zürich (Switzerland)

Published in SPIE Proceedings Vol. 8313:
Medical Imaging 2012: Physics of Medical Imaging
Norbert J. Pelc; Robert M. Nishikawa; Bruce R. Whiting, Editor(s)

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