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Proceedings Article

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

[+] Author Affiliations
Robert M. Gagne, Charles N. West, Robert F. Wagner, P. W. Quinn

Ctr. for Devices and Radiological Health/FDA (USA)

Proc. SPIE 1896, Medical Imaging 1993: Physics of Medical Imaging, 248 (September 14, 1993); doi:10.1117/12.154596
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From Conference Volume 1896

  • Medical Imaging 1993: Physics of Medical Imaging
  • Rodney Shaw
  • Newport Beach, CA | February 14, 1993

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.

© (1993) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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, 248 (September 14, 1993); doi:10.1117/12.154596; http://dx.doi.org/10.1117/12.154596


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