Trade-off between three objectives (objective functions) for a prostate implant:
f
1
:
PTV coverage
,
f
2
:
urethra overdose
and
f
3
:
rectum overdose
.
There resulting
three two-dimensional projections
are shown. These show the
trade-off
between two
objectives in each case.
While for two objectives a solution very close to the optimal can be found, this becomes more difficult as more
objectives are considered.
The complexity of the
Pareto Front
increases rapidly with the number of
objectives / objective functions
.
Inverse Optimisation and Planning: A Multi-Objective (MO) Problem