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A photon-counting detector for dual-energy breast tomosynthesis
KTH, School of Engineering Sciences (SCI), Physics, Medical Imaging.
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2009 (English)In: Medical Imaging 2009: Physics of Medical Imaging, 2009, Vol. 7258, 72581- p.Conference paper (Refereed)
Abstract [en]

We present the first evaluation of a recently developed silicon-strip detector for photon-counting dual-energy breast tomosynthesis. The detector is well suited for tomosynthesis with high dose efficiency and intrinsic scatter rejection. A method was developed for measuring the spatial resolution of a system based on the detector in terms of the three-dimensional modulation transfer function (MTF). The measurements agreed well with theoretical expectations, and it was seen that depth resolution was won at the cost of a slightly decreased lateral resolution. This may be a justifiable trade-off as clinical images acquired with the system indicate improved conspicuity of breast lesions. The photon-counting detector enables dual-energy subtraction imaging with electronic spectrumsplitting. This improved the detectability of iodine in phantom measurements, and the detector was found to be stable over typical clinical acquisition times. A model of the energy resolution showed that further improvements are witn reach by optimization of the detector.

Place, publisher, year, edition, pages
2009. Vol. 7258, 72581- p.
, Progress in Biomedical Optics and Imaging - Proceedings of SPIE, ISSN 1605-7422
Keyword [en]
Dual-energy subtraction, Energy resolution, Mammography, Photon counting, Spatial resolution, Tomosynthesis
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URN: urn:nbn:se:kth:diva-86513DOI: 10.1117/12.813037ScopusID: 2-s2.0-66749148423ISBN: 978-081947509-1OAI: diva2:500781
Medical Imaging 2009: Physics of Medical Imaging; Lake Buena Vista, FL; 9 February 2009 through 12 February 2009
QC 20120215Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2012-02-15Bibliographically approved

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Fredenberg, ErikCederström, BjörnDanielsson, Mats
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