IGRT 2016 Madrid

Computing margins

Error (SD)

Lung classic

Imaging snapshot setup

4 mm

S

Imaging snapshot organ

3 mm

S S S s

A=10 mm  3.3 mm

Imaging snapshot respiration

Delineation

4 mm

Treatment setup

4 mm

Treatment organ motion

3 mm

s

A=10 mm  3.3 mm

Treatment respiration

s

Margin M

22 mm

M

s 7.0 5.2 +S 

van Herk et al IJROBP 2000