| Schedule | Constraint | Source |
|---|---|---|
| 50.4 Gy / 28 fx 45–54 Gy / 25–30 fx | Whole organ D100% <45 Gy | QUANTEC summary |
Avoid hotspots.
Quoted from QUANTEC summary, checked 2026-09-29. Full table with references →
| Schedule | Constraint | Source |
|---|---|---|
| 42–54 Gy / 3 fx Liver metastases | D0.1 cc ≤22.2 Gy | UK SABR consensus 2022 |
| D10 cc ≤16.5 Gy | UK SABR consensus 2022 | |
| 27.5–60 Gy / 5 fx HCC or metastases | D0.1 cc ≤33 Gy (optimal), ≤35 Gy (mandatory) | UK SABR consensus 2022 |
| D10 cc ≤25 Gy | UK SABR consensus 2022 |
Quoted from eviQ 4026, checked 2026-09-29. Full table with references →
The stomach lies in the left upper quadrant, from the gastroesophageal junction to the pylorus. Its size, shape and position change with filling, which is why upper GI simulations use fasting or a consistent small drink.
The stomach holds swallowed food and starts breaking it down with acid and enzymes.
The stomach is a hollow, serial-like organ: the concern is ulceration, bleeding or perforation from high dose to part of its wall. It limits dose for gastroesophageal junction, pancreas and left-lobe liver targets. In SBRT, small-volume hotspots (such as the dose to 0.1–0.5 cc) are the main limits; in conventional plans, protocols ask to avoid hotspots in the stomach, and one esophageal protocol asks planners using IMRT or VMAT to consider the dose to the greater curvature.
Timmerman 2022 (Tables 8–11, written for its SBRT dose tables): the entire stomach wall and its contents, from the gastroesophageal junction to the start of the duodenum at the pylorus.
RTOG consensus guidelines and atlas for delineating upper abdominal normal organs. Citation checked against Europe PMC.
An editorial history of the UT Southwestern SABR constraint tables — often called the “Timmerman tables” — covering how they were developed and revised, and their relationship to AAPM TG-101 and NRG/RTOG protocols. Tables 2–11 separate serial tissues (listed with a volume, a volume max and a max point dose) from parallel tissues (listed with a critical volume and a critical-volume dose max). In Tables 2–7 a footnote defines “point” as ≤0.035 cm³; Tables 8–11 add a contouring-instructions column for each structure.