Comparison Of Modified Bootstrap And Conventional Sensitometry In Medical Radiography

Daniel R Bednarek; Stephen Rudin

doi:10.1117/12.958895

18 August 1980 Comparison Of Modified Bootstrap And Conventional Sensitometry In Medical Radiography

Daniel R Bednarek, Stephen Rudin

Proceedings Volume 0233, Application of Optical Instrumentation in Medicine VIII; (1980) https://doi.org/10.1117/12.958895
Event: Application of Optical Instrumentation in Medicine VIII, 1980, Las Vegas, United States

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 step-ped 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 boot-strap approach since it provides sufficient exposure latitude to encompass the useful den-sity 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 equipment.

Citation Download Citation

Daniel R Bednarek and Stephen Rudin "Comparison Of Modified Bootstrap And Conventional Sensitometry In Medical Radiography", Proc. SPIE 0233, Application of Optical Instrumentation in Medicine VIII, (18 August 1980); https://doi.org/10.1117/12.958895

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