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Margin reduction?
Not necessarily !
•
Hodgkin Lymphoma, considering daily CBCT and INRT
(PET/CT in treatment position)
•
Free breathing margins: 1cm all around
•
DIBH margins
➢
3mm contouring uncertainty (systematic)
➢
2 mm breath hold uncertainty (random)
➢
3 mm image registration/ residual set up error (random)
➢
Margins = 1 cm !!!
Work in progress, courtesy of
Laura Rechner, Rigshospitalet