ASMR

Margins

• Delineation: 2-3 mm SD • Setup: 1-2 mm SD (Portal imaging)

Systematic

Random

Delineation

2-3 mm

-

Setup

1-2 / 1-4 mm

1-2 / 1-4 mm

Organ motion

Depends on tumor location

Depends on tumor location

Total

2-4

1-4 mm

• Margin: 5 mm (best case) ……. 13 mm (worst case) • E.g. boost area  high precision/small margins Nodal regions  less precision/but CTV!