Weighted f values determined from spectral distributions

William D. Mcdavid, Robert G. Waggener, Louis B. Levy, Peter Zanca

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Expressions provided by various authors for the weighted roentgens to rads conversion factor f¯ are examined and compared. It is shown that f values should be weighted by the relative exposure at each energy interval; f¯ arrived at in this way is equivalent to the f¯ obtained from the ratio of mass energy absorption coefficients weighted by energy fluence as described in ICRU Report 17. It is also equivalent to f¯ as calculated directly as the ratio of relative total absorbed dose and relative total exposure.

Original languageEnglish (US)
Pages (from-to)33-34
Number of pages2
JournalMedical physics
Issue number1
StatePublished - Jan 1974

ASJC Scopus subject areas

  • Biophysics
  • Radiology Nuclear Medicine and imaging

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