788 / 1245
Cross sections are scaled by mass density
Σ
– cross section for a medium represented by mass density,
– mass density in the patient (
=1)
Σ
– cross section for water
[ ( )/ ]
is the correction function which is always equal to unity for water.
Some additional considerations may be present in certain situations
April 2017
32
Σ
= [ ( )/ ] ∙
∙ Σ