29 December 1982 Evaluation Of The Contrast Ratio Of Intensified Fluoroscopic Imaging Systems
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Proceedings Volume 0347, Application of Optical Instrumentation in Medicine X; (1982) https://doi.org/10.1117/12.933833
Event: Application of Optical Instrumentation in Medicine X, 1982, New Orleans, United States
Abstract
Large area contrast loss in image intensifiers results in reduced performance at low spatial frequencies and may limit the imaging capabilities of such systems for structures of clinical interest having inherently low subject contrast. The contrast ratio of image intensifiers is a measure of large area contrast loss which may be evaluated under laboratory conditions by photometric techniques. Unfortunately such techniques are not readily extended to clinically installed systems. A technique for the measurement of contrast ratio on clinically installed systems, incorporating a film recording camera, is proposed which eliminates the requirement of having a precise knowledge of the film's characteristic curve. The results of measurements obtained with this technique on clinical systems, as well as comparison of this technique to photometric measurements under laboratory conditions are presented, along with a discussion of the associate problems and pitfalls.
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Raymond P. Rossi, Raymond P. Rossi, Neil Bromberg, Neil Bromberg, } "Evaluation Of The Contrast Ratio Of Intensified Fluoroscopic Imaging Systems", Proc. SPIE 0347, Application of Optical Instrumentation in Medicine X, (29 December 1982); doi: 10.1117/12.933833; https://doi.org/10.1117/12.933833
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