A photon-counting detector for dual-energy breast tomosynthesis

Erik Fredenberg; Mats Lundqvist; Magnus Åslund; Magnus Hemmendorff; Björn Cederström; Mats Danielsson

doi:10.1117/12.813037

13 March 2009 A photon-counting detector for dual-energy breast tomosynthesis

Erik Fredenberg, Mats Lundqvist, Magnus Åslund, Magnus Hemmendorff, Björn Cederström, Mats Danielsson

Proceedings Volume 7258, Medical Imaging 2009: Physics of Medical Imaging; 72581J (2009) https://doi.org/10.1117/12.813037
Event: SPIE Medical Imaging, 2009, Lake Buena Vista (Orlando Area), Florida, United States

Abstract

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 within reach by optimization of the detector.

Citation Download Citation

Erik Fredenberg, Mats Lundqvist, Magnus Åslund, Magnus Hemmendorff, Björn Cederström, and Mats Danielsson "A photon-counting detector for dual-energy breast tomosynthesis", Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 72581J (13 March 2009); https://doi.org/10.1117/12.813037

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