In The Field Measurement Of Image Intensifier Tube Contrast: Results, 1981

Robert J. Moore

doi:10.1117/12.933831

29 December 1982 In The Field Measurement Of Image Intensifier Tube Contrast: Results, 1981

Robert J. Moore

Proceedings Volume 0347, Application of Optical Instrumentation in Medicine X; (1982) https://doi.org/10.1117/12.933831
Event: Application of Optical Instrumentation in Medicine X, 1982, New Orleans, United States

Abstract

An important parameter in any image intensifier-based fluoroscopic or fluorographic imaging system is the percent contrast (also called the Veiling Glare) of the image intensifier tube itself. A photographic technique for the measurement of this important parameter in-the-field, developed by the author over the last six years, has been used over the past year to survey seventy-five (75) different image intensifier tubes. Results for the percent contrast measurements for this group of image intensifier tubes will be given. Based on these results, a rating system of "low", "low normal", "normal", and "high normal" is established. Different rating schemes are derived for image intensifier tubes installed before 1979 (average percent contrast = 70%) and installed 1979 to 1981 (average percent contrast = 77%). Pitfalls in the application of the photographic technique of image intensifier tube contrast determination, as well as crosschecks on the method, are also discussed.

Citation Download Citation

Robert J. Moore "In The Field Measurement Of Image Intensifier Tube Contrast: Results, 1981", Proc. SPIE 0347, Application of Optical Instrumentation in Medicine X, (29 December 1982); https://doi.org/10.1117/12.933831

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