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Proceedings Paper

Energy weighting improves the image quality of spectral mammograms: Implementation on a photon-counting mammography system
Author(s): Johan Berglund; Henrik Johansson; Hanns-Ingo Maack; Erik Fredenberg
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Paper Abstract

In x-ray imaging, contrast information content varies with photon energy. It is therefore possible to improve image quality by weighting photons according to energy. We have implemented and evaluated so-called energy weighting on a commercially available spectral photon-counting mammography system. A practical formula for calculating the optimal weight from pixel values was derived. Computer simulations and phantom measurements revealed that the contrast-tonoise ratio was improved by 3%–5%, and automatic image analysis showed that the improvement was detectable in a set of screening mammograms.

Paper Details

Date Published: 19 March 2014
PDF: 7 pages
Proc. SPIE 9033, Medical Imaging 2014: Physics of Medical Imaging, 90331E (19 March 2014); doi: 10.1117/12.2042238
Show Author Affiliations
Johan Berglund, Philips Healthcare (Sweden)
Henrik Johansson, Philips Healthcare (Sweden)
Hanns-Ingo Maack, Philips Healthcare (Sweden)
Erik Fredenberg, Philips Healthcare (Sweden)

Published in SPIE Proceedings Vol. 9033:
Medical Imaging 2014: Physics of Medical Imaging
Bruce R. Whiting; Christoph Hoeschen, Editor(s)

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