Large Area Contrast Prediction In Screen-Film Systems

Carl , J. Vyborny; Charles E. Metz; Kunio Doi

doi:10.1117/12.958900

18 August 1980 Large Area Contrast Prediction In Screen-Film Systems

Carl , J. Vyborny, Charles E. Metz, Kunio Doi

Proceedings Volume 0233, Application of Optical Instrumentation in Medicine VIII; (1980) https://doi.org/10.1117/12.958900
Event: Application of Optical Instrumentation in Medicine VIII, 1980, Las Vegas, United States

Abstract

A method for the prediction of radiographic contrast rendered by screen-film systems is described. The observed invariance of H & D curve shape with x-ray energy is used to postulate the existence of a single characteristicyrve for a given system. Densities are then described from this curve in terms of an effective exposure S(E)0(E)dE, where S(E) and 0(E) are the energy dependent sensitivity of the system and the x-ray spectral fluence respectively. We used two experiments to demonstrate the validity of this approach for typical screen-film systems. Contrast predictions based on fs(E)o(E)dE were made for screen-film systems having different phosphor materials. Results, which show contrast advantages for calcium tungstate systems in the no scatter case are consistent with the calculations of others based on screen x-ray energy absorption.

Citation Download Citation

Carl , J. Vyborny, Charles E. Metz, and Kunio Doi "Large Area Contrast Prediction In Screen-Film Systems", Proc. SPIE 0233, Application of Optical Instrumentation in Medicine VIII, (18 August 1980); https://doi.org/10.1117/12.958900

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