What ITV to PTV expansions do you use for free-breathing definitive IMRT for locally advanced NSCLC using CT sim with 4DCT?

RTOG 1308 uses 5mm, but is standard practice the same? Do you do daily CBCT?

Answer from: Radiation Oncologist at Academic Institution

This seems like a simple question, but it is not! It is missing something...the concept of the CTV (clinical target volume) is missing within the question. The idea of the CTV is to include microscopic disease within the region receiving full dose. In the case of locally-advanced lung cancer, CTV is...

Comments

Radiation Oncologist at Massachusetts General Hospital
Agree with this answer, but in general, our practi...

Radiation Oncologist at UCLA | VA Greater Los Angeles Healthcare System
Great question and discussion. It's unfortunate th...

Radiation Oncologist at Vanderbilt-Ingram Cancer Center
A related question I've always had about CTV in NS...

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What ITV to PTV expansions do you use for free-breathing definitive IMRT for locally advanced NSCLC using CT sim with 4DCT?

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