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Proceedings Paper

Automatic Brightness Stabilizers
Author(s): Melvin P. Siedband
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Paper Abstract

The Automatic Brightness Stabilizer, ABS, is that part of the X-ray control system which keeps the light output of the image intensifier constant over variations of patient attenuation and system geometry. This permits consistent TV or film exposures during a series of fluoroscopic examinations. (Ref. 1) A properly designed ABS will operate with several constraints: 1. It will hold the image brightness constant for variations of patient thickness and attenuation. 2. It will ignore marginal flashes and the effects of normal coning. 3. It will preserve image contrast and minimize noise. 4. It will keep the operation within generator ratings. 5. It will effect a reasonable compro-mise between patient exposure and image quality. 6. It will keep patient exposure to below 5 R/min except when an override is used. 7. It will respond fast enough to track during an examination. 8. It will correct for system variables such as IA mode, camera rate, etc. 9. It can be shut off and held at a particular value (after reaching equilibrium) prior to injection of contrast media. 10. It can be shut off to allow manual control of factors.

Paper Details

Date Published: 1 February 1975
PDF: 4 pages
Proc. SPIE 0047, Application of Optical Instrumentation in Medicine III, (1 February 1975); doi: 10.1117/12.954061
Show Author Affiliations
Melvin P. Siedband, University of Wisconsin (United States)

Published in SPIE Proceedings Vol. 0047:
Application of Optical Instrumentation in Medicine III
Paul L. Carson; Edward L. Chaney; William R. Hendee, Editor(s)

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