IMRT

Dose is calculate for all different scenarios = e.g. all possible positions

j ∑

( x ) = D s ij

d s i

x j

max s

f ( d s )

⎡ ⎣

⎤ ⎦

Function is minimized for theWORST possible case

The plan that comes out will fit the worst patient situation, but is probably too strict