The Effect Of Bias Exposure On The Detective Quantum Efficiency Of Radiographic Screen-Film Systems

Richard L. VanMetter; Rodney Shaw

doi:10.1117/12.947250

11 June 1985 The Effect Of Bias Exposure On The Detective Quantum Efficiency Of Radiographic Screen-Film Systems

Richard L. VanMetter, Rodney Shaw

Proceedings Volume 0535, Application of Optical Instrumentation in Medicine XIII; (1985) https://doi.org/10.1117/12.947250
Event: 1985 Medical Imaging Conferences, 1985, California, United States

Abstract

The detective quantum efficiency (DQE) of radiographic screen-film systems is limited at low exposures by the threshold response of silver halide grains. Model calculations predict improvements in DQE at low x-ray exposures with a uniform (light) bias exposure to the film. The DQE gains predicted are compared with those established in the literature for the case where the signal exposure is also a direct light exposure. An optimum bias exposure has been calculated that balances the increase in grain sensitivity against the increase in fog to maximize DQE for the limit of very small exposures.

Citation Download Citation

Richard L. VanMetter and Rodney Shaw "The Effect Of Bias Exposure On The Detective Quantum Efficiency Of Radiographic Screen-Film Systems", Proc. SPIE 0535, Application of Optical Instrumentation in Medicine XIII, (11 June 1985); https://doi.org/10.1117/12.947250

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