Variable-Thickness Chest Filtration: The Effect Of High Atomic Number Filter Materials

Carl J. Vyborny; Heber MacMahon; Kunio Doi; Mircea Sabau

doi:10.1117/12.943192

28 August 1984 Variable-Thickness Chest Filtration: The Effect Of High Atomic Number Filter Materials

Carl J. Vyborny, Heber MacMahon, Kunio Doi, Mircea Sabau

Proceedings Volume 0486, Medical Imaging and Instrumentation '84; (1984) https://doi.org/10.1117/12.943192
Event: Medical Imaging and Instrumentation '84, 1984, Las Vegas, United States

Abstract

The effect of filter material on the properties of variable-thickness equalization filters for chest radiography was investigated. Filters made of nickel, tantalum, and lead which provided very similar improvements in mediastinal penetration were compared with regard to their scatter fractions, image contrasts and patient exposures. Their performances in these terms were found to be very similar, even though they produce considerably different x-ray spectra. The K edge filters (tantalum and lead) yielded slightly higher image contrast and patient exposure than did the non-K edge filter (nickel). The effect of filter material on contrast and exposure was less than the effect of usual patient-to-patient variation on these quantities, however.

Citation Download Citation

Carl J. Vyborny, Heber MacMahon, Kunio Doi, and Mircea Sabau "Variable-Thickness Chest Filtration: The Effect Of High Atomic Number Filter Materials", Proc. SPIE 0486, Medical Imaging and Instrumentation '84, (28 August 1984); https://doi.org/10.1117/12.943192

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