Laboratory measurements of sensitometry, MTF, veiling glare, Wiener spectrum and DQE for image intensifier tubes

Robert M. Gagne; Charles N. West; Robert F. Wagner; P. W. Quinn

doi:10.1117/12.154596

14 September 1993 Laboratory measurements of sensitometry, MTF, veiling glare, Wiener spectrum and DQE for image intensifier tubes

Robert M. Gagne, Charles N. West, Robert F. Wagner, P. W. Quinn

Author Affiliations +

Proceedings Volume 1896, Medical Imaging 1993: Physics of Medical Imaging; (1993) https://doi.org/10.1117/12.154596
Event: Medical Imaging 1993, 1993, Newport Beach, CA, United States

Abstract

Several different test protocols were used to measure the sensitometric response, the modulation transfer function (MTF), the veiling glare and the Wiener spectrum of two x-ray image intensifier (II) tubes. These data provided the means to calculate summary measures of imaging performance, i.e., the noise equivalent quanta, NEQ, or the detective quantum efficiency, DQE, as a function of spatial frequency. Results are presented to show the differences between an older versus a newer generation II tube, i.e., DQE equals 0.3 +/- 0.03 and 0.6 +/- 0.06 at 0.5 lp/mm, respectively. The eventual goal of this work is to achieve some consensus on methodology for these measurements and to validate the use of algorithmic observers in quantitating imaging performance in the clinical environment.

Citation Download Citation

Robert M. Gagne, Charles N. West, Robert F. Wagner, and P. W. Quinn "Laboratory measurements of sensitometry, MTF, veiling glare, Wiener spectrum and DQE for image intensifier tubes", Proc. SPIE 1896, Medical Imaging 1993: Physics of Medical Imaging, (14 September 1993); https://doi.org/10.1117/12.154596

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