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Proceedings Paper

Si-strip photon counting detectors for contrast-enhanced spectral mammography
Author(s): Buxin Chen; Ingrid Reiser; Jan C. Wessel; Nail Malakhov; Gregor Wawrzyniak; Neal E. Hartsough; Thulasi Gandhi; Chin-Tu Chen; Jan S. Iwanczyk; William C. Barber
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Paper Abstract

We report on the development of silicon strip detectors for energy-resolved clinical mammography. Typically, X-ray integrating detectors based on scintillating cesium iodide CsI(Tl) or amorphous selenium (a-Se) are used in most commercial systems. Recently, mammography instrumentation has been introduced based on photon counting Si strip detectors. The required performance for mammography in terms of the output count rate, spatial resolution, and dynamic range must be obtained with sufficient field of view for the application, thus requiring the tiling of pixel arrays and particular scanning techniques. Room temperature Si strip detector, operating as direct conversion x-ray sensors, can provide the required speed when connected to application specific integrated circuits (ASICs) operating at fast peaking times with multiple fixed thresholds per pixel, provided that the sensors are designed for rapid signal formation across the X-ray energy ranges of the application. We present our methods and results from the optimization of Si-strip detectors for contrast enhanced spectral mammography. We describe the method being developed for quantifying iodine contrast using the energy-resolved detector with fixed thresholds. We demonstrate the feasibility of the method by scanning an iodine phantom with clinically relevant contrast levels.

Paper Details

Date Published: 27 August 2015
PDF: 8 pages
Proc. SPIE 9594, Medical Applications of Radiation Detectors V, 959406 (27 August 2015); doi: 10.1117/12.2195609
Show Author Affiliations
Buxin Chen, The Univ. of Chicago (United States)
Ingrid Reiser, The Univ. of Chicago (United States)
Jan C. Wessel, DxRay, Inc. (United States)
Interon AS (Norway)
Nail Malakhov, Interon AS (Norway)
Gregor Wawrzyniak, Interon AS (Norway)
Neal E. Hartsough, DxRay, Inc. (United States)
Thulasi Gandhi, DxRay, Inc. (United States)
Chin-Tu Chen, The Univ. of Chicago (United States)
Jan S. Iwanczyk, DxRay, Inc. (United States)
William C. Barber, DxRay, Inc. (United States)
Interon AS (Norway)

Published in SPIE Proceedings Vol. 9594:
Medical Applications of Radiation Detectors V
H. Bradford Barber; Lars R. Furenlid; Hans N. Roehrig, Editor(s)

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