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Proceedings Paper

Veiling Glare In The Imaging Chain
Author(s): Neil Bromberg; John Bickford
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Paper Abstract

It has been observed that image intensifier contrast ratio measurements taken on clinically installed systems always produce lower values than reported by the manufacturer. One common method of measuring the contrast ratio in the field uses the film recording camera which comes with the system, while the manufacturers always measure the image intensifier isolated from other system components. Evidence is presented showing that the difference between the two measurements is attributable to contrast losses in the optics. Also, evidence is presented suggesting that there is no observable difference in contrast presentation for image tubes with contrast ratios larger than 15. Contrast ratio measurement on clinically installed systems are recommended for performance monitoring purposes only.

Paper Details

Date Published: 15 June 1984
PDF: 5 pages
Proc. SPIE 0454, Application of Optical Instrumentation in Medicine XII, (15 June 1984); doi: 10.1117/12.939358
Show Author Affiliations
Neil Bromberg, General Electric Company (United States)
John Bickford, General Electric Company (United States)

Published in SPIE Proceedings Vol. 0454:
Application of Optical Instrumentation in Medicine XII
Samuel J. Dwyer III; Roger H. Schneider, Editor(s)

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