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Radiation Oncology • Gastrointestinal Cancers
When treating adenocarinoma of the pancreas to 75 Gy in 25 fractions, what dose constraints do you use for small bowel, large bowel, and stomach?
What are your fields? Do you treat nodes electively?
Answer from: Radiation Oncologist at Academic Institution
Planning Volumes
Definition
Doses by Fractionation Scheme
15-Fraction
25-Fraction
Microscopic Extension PTV
CTV + 5mm
(CTV = GTV + 1cm + CA, SMA, +/- porta hepatis, +/- splenic hilum basins)
37.5Gy/15
45Gy/25...
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