VolumeRendering
Absorption Coefficient
← Optical Model | ● | Absorption →
The so called transfer function $TF_A$ defines the absorption coefficient $\mu$
depending on the a particular scalar value $s=V(x,y,z)$:
$ \mu = TF_A(s) $
In case of CT data, the absorption coefficient is determined by the Hounsfield-values of the volume:
$ \mu = TF_A(s) = CT^{-1}(s) $
Otherwise a the assumption of a linear relationship between scalar value and absorption coefficient is common:
$TF_A(s)=\mu_A \cdot s $
$\mu_A$ is called global absorptions coefficient.
Same holds for emission:
$ TF_E(s)=\mu_E \cdot s $
$\mu_E$ is called the global emission coefficient.
← Optical Model | ● | Absorption →