IMRT

One step further: Margin adaption

planning CT

…

…

Fx 1

(IMRT) plan

Fx 5

Fx 6

Fx N

pretreatment setup correction

new isocentre for the following Fx’s

…

PI

PI

estimation of systematic error

reduction of setup error for the following Fx’s!

Now that we have determined and reduced the patient-individual systematic error: Why not also reduce/adapt the margin???

ESTRO IMRT course 2015 Adaptive Radiotherapy Brussels October 8th, 2015

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