Preliminary performance characteristics of a dual-energy KCD

Robert J. Endorf; Sunil Kulatunga; David C. Spelic; Stephen R. Thomas; Frank A. DiBianca; Herbert D. Zeman; George C. Giakos

doi:10.1117/12.208383

8 May 1995 Preliminary performance characteristics of a dual-energy KCD

Robert J. Endorf, Sunil Kulatunga, David C. Spelic, Stephen R. Thomas, Frank A. DiBianca, Herbert D. Zeman, George C. Giakos

Author Affiliations +

Proceedings Volume 2432, Medical Imaging 1995: Physics of Medical Imaging; (1995) https://doi.org/10.1117/12.208383
Event: Medical Imaging 1995, 1995, San Diego, CA, United States

Abstract

A kinestatic charge detector (KCD) with segmented signal-collection fingers was constructed to evaluate the dual-energy x-ray imaging performance of a KCD. The front segments of the KCD signal-collectors produce a digital low-energy image and the back segments produce a digital high-energy image. A gap between the front and back signal-collectors is used as a filter to increase the separation between the mean energies absorbed in the front and back segments. Preliminary measurements have been performed on the dual-energy KCD to determine its dual-energy imaging characteristics. The KCD output signal has been measured as a function of depth in the chamber. The ion drift velocity, modulation transfer function (MTF), detective quantum efficiency (DQE) and Wiener spectrum have been determined for both the front (low-energy) and back (high-energy) signal detection regions of the KCD.

Citation Download Citation

Robert J. Endorf, Sunil Kulatunga, David C. Spelic, Stephen R. Thomas, Frank A. DiBianca, Herbert D. Zeman, and George C. Giakos "Preliminary performance characteristics of a dual-energy KCD", Proc. SPIE 2432, Medical Imaging 1995: Physics of Medical Imaging, (8 May 1995); https://doi.org/10.1117/12.208383

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