Table 2.
Institutional clinical criteria for stereotactic body radiation therapy paraspinal and other metastatic tumor plans
| Plan type | Clinical criteria |
|
|---|---|---|
| Ideal | Acceptable | |
| Paraspinal | ||
| PTV | ||
| V100% (%) | ≥90% | ≥80% |
| V95% (%) | ≥95% | ≥90% |
| Metastases | ||
| PTV | ||
| V100% (%) | ≥98% | ≥95% |
| Single fraction | ||
| CTV | ||
| D(smallest 0.035cc )(Gy) | 15 | |
| GTV | ||
| D(smallest 0.035cc )(Gy) | 15 | |
| Cord | ||
| Dmax (Gy) | ≤14 | |
| D0.35cc (Gy) | ≤10∗ | |
| Cauda | ||
| Dmax (Gy) | ≤18 | |
| D5cc (Gy) | ≤14 | |
| Esophagus | ||
| D2.5cc (Gy) | ≤14 | ≤18 |
| Bowel | ||
| D5cc (Gy) | ≤12 | |
| Three fractions | ||
| Cord | ||
| Dmax (Gy) | ≤24 (13.9†) | ≤26 (14.5†) |
| D0.35cc (Gy) | ≤18 (10†) | |
| Cauda | ||
| Dmax (Gy) | ≤26 (15†) | |
| D5cc (Gy) | ≤22 (13†) | |
| Esophagus | ||
| Dmax (Gy) | ≤27.6 | ≤30 (20.4†) |
| D5cc (Gy) | ≤16.8 | ≤22 |
| Five fractions | ||
| Cord | ||
| Dmax (Gy) | ≤30 (17†) | ≤30 (18†) |
| D0.35cc(Gy) | ≤23 (14†) | |
| Cauda | ||
| Dmax (Gy) | ≤35 (20†) | |
| D5cc (Gy) | ≤30 (17†) | |
| Esophagus | ||
| Dmax (Gy) | ≤32.2 | ≤50 (25†) |
| D5cc (Gy) | ≤19 | ≤27.5 |
Abbreviations: CTV = clinical target volume; GTV = gross target volume; PTV = planning target volume.
∗
10 Gy must not transect the entire cord contour on any axial slice.
†
Criteria with pertinent previous radiation therapy.