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Optical Engineering

Modified Bootstrap Sensitometry In Radiography
Author(s): Daniel R. Bednarek; Stephen Rudin
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Paper Abstract

A new modified bootstrap approach to sensitometry is presented which provides H and D curves that show almost exact agreement with those obtained using conventional methods. Two bootstrap techniques are described; both involve a combination of inverse-square and stepped-wedge modulation of the radiation field and provide intensity-scale sensitometric curves as appropriate for medical radiography. H and D curves obtained with these modified techniques are compared with those obtained for screen-film combinations using inverse-square sensitometry as well as with those obtained for direct x-ray film using time-scale sensitometry. The stepped wedge of the Wisconsin X-Ray Test Cassette was used in the bootstrap approach since it provides sufficient exposure latitude to encompass the useful density range of medical x-ray film. This approach makes radiographic sensitometry quick and convenient, allowing accurate characteristic curves to be obtained for any screen-film cassette using standard diagnostic x-ray equipment.

Paper Details

Date Published: 1 April 1981
PDF: 4 pages
Opt. Eng. 20(2) 202271 doi: 10.1117/12.7972703
Published in: Optical Engineering Volume 20, Issue 2
Show Author Affiliations
Daniel R. Bednarek, State University of New York at Buffalo (United States)
Stephen Rudin, State University of New York at Buffalo (United States)

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