Table 3.
Treatment plan comparison for metastases of the lumbar vertebra (SIB)
| Structure | Parameter | DVO | Single Arc | IMRT |
|---|---|---|---|---|
| GTV | D50% | Uniform | 55.0 Gy | 55.0 Gy |
| H | Dose | 7.3 | 7.1 | |
| GTV | V95% | 55 Gy | 95.6% | 95.9% |
| PTV | D95% | ≥ 40.0 Gy | 41.4 Gy | 40.5 Gy |
| Normal Tissue | D1% | ≤ 40.0 Gy | 41.3 Gy | 42.6 Gy |
| D20% | ≤ 15.0 Gy | 13.6 Gy | 8.0 Gy | |
| D60% | ≤ 5.0 Gy | 1.8 Gy | 1.3 Gy | |
| Left Kidney | D40% | ≤ 10.0 Gy | 9.4 Gy | 7.8 Gy |
| Right Kidney | D40% | ≤ 10.0 Gy | 9.0 Gy | 5.3 Gy |
| Spinal Cord | D1 ccm | ≤ 45.0 Gy | 41.7 Gy | 41.1 Gy |
| Monitor Units | MU/2.5 Gy | - | 698 | 736 |
| Time | Calculation | - | 13:50 min | 2:45 min |
| Delivery | - | 4:30 min | 11:00 min | |
DX% and D1 ccm are the doses delivered to X% of the volume and 1 cm3 respectively, V95% the volume receiving 95% of the prescription dose in%, Homogeneity H = (D5% - D95%)/Daverage.