2017_IGRT course book

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

IGRT 2015 – M. Aznar