Sensitometry At Low X-Ray Energies

Daniel R. Bednarek; Stephen Rudin; Roland Wong

doi:10.1117/12.931783

16 July 1981 Sensitometry At Low X-Ray Energies

Daniel R. Bednarek, Stephen Rudin, Roland Wong

Proceedings Volume 0273, Application of Optical Instrumentation in Medicine IX; (1981) https://doi.org/10.1117/12.931783
Event: Application of Optical Instrumentation in Medicine, 1981, San Francisco, United States

Abstract

Inverse-square sensitometry for low kVp techniques is limited by air attenuation and beam hardening. It is thus difficult to obtain accurate H and D curves for mammographic screen-film combinations at technique factors used clinically. Methods are described for the determination of characteristic curves at low x-ray energies which provide composite intensity-scale curves using small changes in source-to-receptor distance and concomitant changes in either exposure time, beam attenuation or kVp. H and D curves obtained at low kVp's using the various sensitometric approaches are compared with those obtained using inverse-square sensitometry; the relative merits of the different methods are discussed.

Citation Download Citation

Daniel R. Bednarek, Stephen Rudin, and Roland Wong "Sensitometry At Low X-Ray Energies", Proc. SPIE 0273, Application of Optical Instrumentation in Medicine IX, (16 July 1981); https://doi.org/10.1117/12.931783

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