Re: Xray Exposure Units?

[rkathren@tricity.wsu.edu (Ron L. Kathren)]

Probably because the roentgen had been defined in terms of C/kg, and thus
the quantity exposure did not change.  Air kerma is a different quantity.

Ron Kathren

 >Does anyone know why, when the roentgen was cast into disrepute, the decision
>was made to use coulombs/kilogram, instead of air kerma, as Gy? The latter
>seems to me to be a simpler and more logical approach, but I may well be
>missing something.
>
>chris alston
>ccja@aol.com
>
>