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PTV
•
PTV - the recommended tool
•
to ensure that the prescribed absorbed dose will actually be delivered to
the CTV with an acceptable probability
•
clearly indicated on the sections used for dose planning and for
specifications of dose
•
PTV margins depend on
•
The clinical situation (patient, tumor site,...)
2016/Athens
•
The chosen technique (beam arrangement, immobilization,...)
•
The center, the staff,...
•
The penumbra is
not
included in the PTV
•
CTV-to-PTV margin takes into account both the internal
and
the setup
uncertainties.