Site | 4-fraction SBRT | Data point | Reference | Reference limit | Reference BED (α/β = 10) | Current BED (α/β = 10) | |
---|---|---|---|---|---|---|---|
Volume | Threshold dose (Gy) per fx | ||||||
Bladder | |||||||
<1 cc | 8.93 | 1 cc | RTOG 0938 | <105% Rx | 67 | 67.6 | |
<2 cc | 4.60 | 2 cc | Institutional* | 4.8 Gy × 4 | -- | -- | |
<15 cc | 4.50 | 15 cc | TG-101 | 5.6 Gy × 3 | 26.2 | 26.1 | |
90% | 7.65 | D10% | RTOG 0938 | <90% Rx | 53.9 | 54.0 | |
50% | 4.25 | D50% | RTOG 0938 | <50% Rx | 24.7 | 24.2 | |
Rectum | |||||||
<1 cc | 8.93 | 1 cc | RTOG 0938 | <105% Rx | 67 | 67.6 | |
<2 cc | 4.60 | 2 cc | Institutional* | 4.8 Gy × 4 | -- | -- | |
<3 cc | 8.08 | 3 cc | RTOG 0938 | <95% Rx | 58.1 | 58.4 | |
<20 cc | 6.50 | 20 cc | TG-101 | 8 Gy × 3 | 43.2 | 42.9 | |
90% | 7.65 | D10% | RTOG 0938 | <90% Rx | 53.9 | 54.0 | |
80% | 6.80 | D20% | RTOG 0938 | <80% Rx | 45.8 | 45.7 | |
50% | 4.25 | D50% | RTOG 0938 | <50% Rx | 24.7 | 24.2 | |
Sigmoid colon | |||||||
<2 cc | 4.80 | 2 cc | Institutional* | 4.8 Gy × 4 | -- | -- | |
<20 cc | 6.50 | 20 cc | TG-101 | 8 Gy × 3 | 43.2 | 42.9 | |
Other bowel | |||||||
Small bowel | <5 cc | 4.75 | 5 cc | TG-101 | 5.9 Gy × 3 | 28.1 | 28.0 |
Large bowel | <20 cc | 6.50 | 20 cc | TG-101 | 8 Gy × 3 | 43.2 | 42.9 |
Femoral Heads | |||||||
Point | 6.89 | Max | RTOG 0938 | <81% Rx | 46.6 | 46.5 | |
<10 cc | 4.59 | 10 cc | RTOG 0938 | <54% Rx | 27.2 | 26.8 |