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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
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Courtesy of B. Engels, MD PhD