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As an analytical solution cannot be (always) obtained we consider the
Inverse Problem
to determine the position and number of catheters, the
position and number of source dwell positions (SDPs), and the source
dwell times, such that the obtained dose distribution
approaches as
much as possible the desired one
via an
Optimisation Process
.
This process is called
Inverse Optimisation
or
Inverse
Planning
.
D = Ψ. A
Introduction on Dose Optimisation
The “Inverse Planning & Optimisation”