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Proceedings Paper

Experimental demonstration of automated scatter-glare correction in fluoroscopic images
Author(s): Robert A. Close; Craig A. Morioka; James Stuart Whiting
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Paper Abstract

Fluoroscopic images are degraded by scattering of x-rays from within the patient and by veiling glare in the image intensifier. Both of these degradations are well described by a response function applied to primary intensity. We can automatically estimate the parameters of the response function with the aid of a reference object placed in the imaging field. Subtraction of the true reference signal yields artifacts unless proper scatter-glare correction is performed. We adjust the scatter-glare parameters in order to minimize these artifacts. We demonstrate this technique using an anthropomorphic phantom plus additional scattering material. Root mean square error in densitometric measurements of an x-ray phantom is reduced by 54 percent compared with no correction and by 36 percent compared with subtraction of uniform scatter measured under a beam stop.

Paper Details

Date Published: 3 May 2002
PDF: 8 pages
Proc. SPIE 4682, Medical Imaging 2002: Physics of Medical Imaging, (3 May 2002); doi: 10.1117/12.465576
Show Author Affiliations
Robert A. Close, Cedars-Sinai Medical Ctr. (United States)
Craig A. Morioka, Cedars-Sinai Medical Ctr. (United States)
James Stuart Whiting, Cedars-Sinai Medical Ctr. (United States)

Published in SPIE Proceedings Vol. 4682:
Medical Imaging 2002: Physics of Medical Imaging
Larry E. Antonuk; Martin Joel Yaffe, Editor(s)

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