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Prostate adaptive RT
Mild laxation to reduce rectal gas
SIB plan (78 Gy) with 10 mm margin for first
6 fractions
6 cone beam scans
Automatically detect prostate motion and
delineate rectum in cone beam scans
Generate prostate in mean position
Generate mean rectum
Replan using mean prostate / rectum with
7 mm margin and treat remaining fractions
Results in better GTV coverage and rectum
sparing (
30% less rectum NTCP)
Planning
CBCT 1..6
Mean
Planning
CBCT 1..6
Mean