Course book Advanced Treatment Planning 2018

Methods: average prostate (rigid registration based)

•Plan → CBCT1: T1/R1

Planning

•Plan → CBCT2: T2/R2

Repeat

•…

Average

•Plan → CBCT6: T6/R6

T

/ R

AVG

AVG

T puts prostate from plan CT in average position AVG / R AVG

• With this CTV the margin can be safely reduced from 10 mm to 7 mm