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Proceedings Paper

X-ray sensitive video camera
Author(s): Randy P. Luhta; John A. Rowlands
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Paper Abstract

By converting the absorbed X-ray image directly to an electrical video signal, the x-ray sensitive video camera offers improved resolution and reduced veiling glare over a conventional x-ray image intensifier for medical fluoroscopy. Unfortunately, currently available x-ray sensitive video cameras are limited to a 1' field of view and poor quantum efficiency. We are developing an x-ray sensitive vidicon for medical use which will have a large field of view (5' or more) and a thicker amorphous selenium target with a quantum efficiency >70%. Due to the larger potential required to bias the thicker a-Se target a problem in maintaining a stable surface potential by means of a scanning electron beam is encountered. This stability problem is overcome by the addition of a suppressor mesh.

Paper Details

Date Published: 14 September 1993
PDF: 10 pages
Proc. SPIE 1896, Medical Imaging 1993: Physics of Medical Imaging, (14 September 1993); doi: 10.1117/12.154617
Show Author Affiliations
Randy P. Luhta, Sunnybrook Health Science Ctr./Univ. of Toronto (Canada)
John A. Rowlands, Sunnybrook Health Science Ctr./Univ. of Toronto (Canada)

Published in SPIE Proceedings Vol. 1896:
Medical Imaging 1993: Physics of Medical Imaging
Rodney Shaw, Editor(s)

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