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