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Proceedings Paper

Dual-energy imaging using a kinestatic charge detector
Author(s): Robert J. Endorf; Vincent J. Schmithorst; Sunil Kulatunga; David C. Spelic; Stephen R. Thomas; Frank A. DiBianca; Carlos Rodriguez; Herbert D. Zeman; Zeping Zhu; George C. Giakos
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Paper Abstract

A small research non imaging kinestatic charge detector (KCD), with segmented signal- collection fingers, has been used to investigate the dual-energy capability of a KCD. The front segments of the signal-collectors produce a digital low-energy x-ray image and the back segments produce a digital high-energy x-ray image. A gap between the front and back signal- collectors may be used as a filter to increase the separation between the mean energies absorbed in the front and back segments. The dual-energy imaging capability of the large-field (2016-channel) KCD, without segmented signal-collection fingers, has also been evaluated using the two-exposure technique of taking two sequential x-ray exposures at different x-ray kilovoltages of a fixed phantom. Dual-energy calibrations, based on various decomposition algorithms, were performed for both the segmented non imaging KCD and the large-field imaging KCD. The calibration parameters were calculated from measurements taken with various thicknesses of aluminum and Plexiglas. The rms errors in aluminum and Plexiglas thicknesses for the various dual-energy decomposition algorithms are compared for each KCD.

Paper Details

Date Published: 11 April 1996
PDF: 12 pages
Proc. SPIE 2708, Medical Imaging 1996: Physics of Medical Imaging, (11 April 1996); doi: 10.1117/12.237849
Show Author Affiliations
Robert J. Endorf, Univ. of Cincinnati (United States)
Vincent J. Schmithorst, Univ. of Cincinnati (United States)
Sunil Kulatunga, Univ. of Cincinnati (United States)
David C. Spelic, Univ. of Cincinnati (United States)
Stephen R. Thomas, Univ. of Cincinnati (United States)
Frank A. DiBianca, Univ. of Tennessee/Memphis (United States)
Carlos Rodriguez, Univ. of Tennessee/Memphis (United States)
Herbert D. Zeman, Univ. of Tennessee/Memphis (United States)
Zeping Zhu, Univ. of Tennessee/Memphis (United States)
George C. Giakos, Univ. of Akron (United States)


Published in SPIE Proceedings Vol. 2708:
Medical Imaging 1996: Physics of Medical Imaging
Richard L. Van Metter; Jacob Beutel, Editor(s)

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