VolumeRendering
Absorption Coefficient
← Optical Model | ● | Absorption →
The so called transfer function TFA defines the absorption coefficient μ
depending on the a particular scalar value s=V(x,y,z):
μ=TFA(s)
In case of CT data, the absorption coefficient is determined by the Hounsfield-values of the volume:
μ=TFA(s)=CT−1(s)
Otherwise a the assumption of a linear relationship between scalar value and absorption coefficient is common:
TFA(s)=μA⋅s
μA is called global absorptions coefficient.
Same holds for emission:
TFE(s)=μE⋅s
μE is called the global emission coefficient.
← Optical Model | ● | Absorption →