A Method For Testing The Performance Of Image Intensifiers

Tamas Sandor; Al Tomer; John C. Klopping

doi:10.1117/12.954588

25 March 1976 A Method For Testing The Performance Of Image Intensifiers

Tamas Sandor, Al Tomer, John C. Klopping

Proceedings Volume 0070, Application of Optical Instrumentation in Medicine IV; (1976) https://doi.org/10.1117/12.954588
Event: Application of Optical Instrumentation in Medicine, IV, 1975, Atlanta, United States

Abstract

A method is described that can be applied in a clinical environment to measure the linepairs/mm resolution, to test the electro-optical focusing, and to measure a quantity Q proportional to the conversion factor of x-ray image intensifiers. The resolution can be determined and electronically optimized by using a monocular of 7.3-12x power to view the image of a metal test pattern placed at the entrance plane of the intensifier. To determine Q, a photometer is used to measure the brightness of the output screen as a function of input exposure rate. The measured data can be fitted with a straight line, the slope of which is proportional to the conversion factor of the image intensifier. According to the results the precision in the measurements of Q was better than 5%.

Citation Download Citation

Tamas Sandor, Al Tomer, and John C. Klopping "A Method For Testing The Performance Of Image Intensifiers", Proc. SPIE 0070, Application of Optical Instrumentation in Medicine IV, (25 March 1976); https://doi.org/10.1117/12.954588

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