Energy And Exposure Rate Dependences Of Ionization Chamber And Fluorescent Type Automatic X-Ray Exposure Controls

Bruce A. Horn; Charles E. Finney; Kim C. Luk

doi:10.1117/12.958918

18 August 1980 Energy And Exposure Rate Dependences Of Ionization Chamber And Fluorescent Type Automatic X-Ray Exposure Controls

Bruce A. Horn, Charles E. Finney, Kim C. Luk

Author Affiliations +

Proceedings Volume 0233, Application of Optical Instrumentation in Medicine VIII; (1980) https://doi.org/10.1117/12.958918
Event: Application of Optical Instrumentation in Medicine VIII, 1980, Las Vegas, United States

Abstract

Manufacturers use either ionization chambers or photomultiplier tubes coupled to fluorescent screens as the pickup device in their automatic film exposure controls. The clinical performance of the control will be affected by its energy and exposure rate dependences. These two parameters are not usually determined independently when evaluating an automatic exposure control. By independently measuring these parameters the performance evaluation procedure can be shortened, while improving the description of performance over a wide range of tube potentials and patient thicknesses. A method to isolate the energy and the exposure rate dependences will be discussed, and measurements representing several manufacturers will be presented.

Citation Download Citation

Bruce A. Horn, Charles E. Finney, and Kim C. Luk "Energy And Exposure Rate Dependences Of Ionization Chamber And Fluorescent Type Automatic X-Ray Exposure Controls", Proc. SPIE 0233, Application of Optical Instrumentation in Medicine VIII, (18 August 1980); https://doi.org/10.1117/12.958918

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