Filters For Chest Radiography

N. Ramanathan; J. Paron

doi:10.1117/12.958916

18 August 1980 Filters For Chest Radiography

N. Ramanathan, J. Paron

Proceedings Volume 0233, Application of Optical Instrumentation in Medicine VIII; (1980) https://doi.org/10.1117/12.958916
Event: Application of Optical Instrumentation in Medicine VIII, 1980, Las Vegas, United States

Abstract

The objective of low dose radiography is achieved by a judicious combination of proper kV selection, fast film-screen systems and beam filtration. A systematic study of filters was undertaken to evaluate the improvements that can be realized in terms of patient Entrance Skin Exposures (ESE) for chest radiographs. The Picker CD 135 Generator and the Automatic Chest Filmer with dynamic phototiming were used for the study. The kV dependence of ESE with various amounts of zinc and aluminum filtration is presented. The effect of filtration on image contrast is discussed. The variations of ESE with phantom thickness under different filtration conditions are also considered. It was found that the ESE can be reduced by as much as a factor of 1.8 ± .1 with no significant increase in tube loading.

Citation Download Citation

N. Ramanathan and J. Paron "Filters For Chest Radiography", Proc. SPIE 0233, Application of Optical Instrumentation in Medicine VIII, (18 August 1980); https://doi.org/10.1117/12.958916

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