783 / 1416
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“en face” proton field
PTV
=
Lateral field edge = set up variability
(approx. 5 mm)
Distal edge: CTV + 2.5% range uncertainty +
2mm
CTV
= conventional
definition except
exclusion of internal
chestwall of ribs and
intercostal muscles
if clinically
appropriate
Proton Therapy – whole breast with boost following lumpectomy
Set-up definition