ESTRO course Dose Modelling and Verification 2017
10
Geometric penumbra
The source related geometric penumbra (10-90%) typically has a width of 3-5 mm at isocenter level, but can in more extreme cases extend up to about 10 mm. Particularly important for small beams and IMRT.
d
coll
d
iso
(SAD)
Y d
Isocenter
Back to MLC penumbras
T Knöös
Warsaw 2017
Made with FlippingBook - professional solution for displaying marketing and sales documents online