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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)=CT1(s)

Otherwise a the assumption of a linear relationship between scalar value and absorption coefficient is common:

TFA(s)=μAs

μA is called global absorptions coefficient.

Same holds for emission:

TFE(s)=μEs

μE is called the global emission coefficient.

Optical Model | | Absorption

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