IMRT

Treatment strategy UZB

4D-CT

< 7 mm => PTV = ITV + 5 mm* ITV approach ≥ 7 mm => internal marker if no contra-indication PTV = GTV + 5mm Dynamic tracking •lesions < 1cm: 8mm PTV margin •lesions < 1cm: no Tracking

Courtesy of B. Engels, MD PhD

45