Energy weighting improves the image quality of spectral mammograms: Implementation on a photon-counting mammography system

Johan Berglund; Henrik Johansson; Hanns-Ingo Maack; Erik Fredenberg

doi:10.1117/12.2042238

19 March 2014 Energy weighting improves the image quality of spectral mammograms: Implementation on a photon-counting mammography system

Johan Berglund, Henrik Johansson, Hanns-Ingo Maack, Erik Fredenberg

Author Affiliations +

Proceedings Volume 9033, Medical Imaging 2014: Physics of Medical Imaging; 90331E (2014) https://doi.org/10.1117/12.2042238
Event: SPIE Medical Imaging, 2014, San Diego, California, United States

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.

Citation Download Citation

Johan Berglund, Henrik Johansson, Hanns-Ingo Maack, and Erik Fredenberg "Energy weighting improves the image quality of spectral mammograms: Implementation on a photon-counting mammography system", Proc. SPIE 9033, Medical Imaging 2014: Physics of Medical Imaging, 90331E (19 March 2014); https://doi.org/10.1117/12.2042238

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