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Proceedings Paper

Imaging performance of a terbium-doped fiber optic screen for diagnostic imaging
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Paper Abstract

The resolution of a fiberoptical boule was determined experimentally. A boule is a matrix of scintillating glass fibers arranged parallel to each other and compressed into a thick plate. A 51 mm X 51 mm by 3 mm thick terbium-activated boule was optically coupled to a 1 k X 1 k X 16 bit CCD camera. The image of an edge was used to compute the line spread function, and the modulation transfer function was calculated. After correcting for the MTF of the CCD and optics, the MTF of the fiberoptical plate demonstrated 20% modulation at a spatial resolution of 15 line pairs per millimeter. The x-ray absorption of the 3 mm thick plate was 98% at 70 kV (3.3. mm half value layer). It is shown using simple trigonometry that for a very high resolution detector, x-ray beam divergence (angled photons striking the receptor) at the periphery of the field of view may cause substantial resolution losses. The role that fiberoptical plate technology may play in diagnostic medical imaging is discussed.

Paper Details

Date Published: 1 May 1994
PDF: 9 pages
Proc. SPIE 2163, Medical Imaging 1994: Physics of Medical Imaging, (1 May 1994); doi: 10.1117/12.174285
Show Author Affiliations
John M. Boone, Univ. of California/Davis Medical Ctr. (United States)
Jeffrey W. Duryea, Univ. of California/Davis Medical Ctr. (United States)
James Anthony Seibert, Univ. of California/Davis Medical Ctr. (United States)

Published in SPIE Proceedings Vol. 2163:
Medical Imaging 1994: Physics of Medical Imaging
Rodney Shaw, Editor(s)

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