Dual-energy imaging using a kinestatic charge detector

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

doi:10.1117/12.237849

11 April 1996 Dual-energy imaging using a kinestatic charge detector

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

Author Affiliations +

Proceedings Volume 2708, Medical Imaging 1996: Physics of Medical Imaging; (1996) https://doi.org/10.1117/12.237849
Event: Medical Imaging 1996, 1996, Newport Beach, CA, United States

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.

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Robert J. Endorf, Vincent J. Schmithorst, Sunil Kulatunga, David C. Spelic, Stephen R. Thomas, Frank A. DiBianca, Carlos Rodriguez, Herbert D. Zeman, Zeping Zhu, and George C. Giakos "Dual-energy imaging using a kinestatic charge detector", Proc. SPIE 2708, Medical Imaging 1996: Physics of Medical Imaging, (11 April 1996); https://doi.org/10.1117/12.237849

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