Table 2.
Tables A–D are samples of the output format of HART-computed dose-volume histogram (DVH) data: (Table A) represents DVH data computed for the target volumes; (Tables B, C) show DVH data computed for the normalized and absolute volumes of normal structures receiving less or more than the prescribed dose (PD); (Table D) shows additional user-specified DVH statistics for normal structures.
| Table A. IMRT head and neck study — DVH data for target structures. | ||||||
|---|---|---|---|---|---|---|
| Patient Name | Trial | PD (cGy) | Min (cGy) | Max (cGy) | Mean (cGy) | Volume (cc) |
| ABC | PTV1 | 3900 | 131.6 | 4352.1 | 4072.6 | 1391.5 |
| PTV2 | 1500 | 95.4 | 1650.5 | 1559.4 | 624.4 | |
| PTV3 | 1950 | 216.3 | 2145.5 | 2027.2 | 308.6 | |
| COMP | 7350 | 95.4 | 8075.9 | 7214.0 | X | |
| Absolute Volume (cc) | |||||||
|---|---|---|---|---|---|---|---|
| Structure | < 0.93PD | < 0.95PD | > 1.05PD | > 1.10PD | > 1.15PD | >1.20PD | |
| ABC | PTV1 | 28.1 | 34.3 | 652.7 | 11.9 | 0.0 | 0.0 |
| PTV2 | 8.7 | 10.71 | 241.0 | 0.0 | 0.0 | 0.0 | |
| PTV3 | 5.2 | 6.4 | 124.7 | 0.0 | 0.0 | 0.0 | |
|
Normalized Volume (%) | |||||||
| ABC | PTV1 | 2% | 3% % | 47 | 1% | 0% | 0% |
| PTV2 | 1% | 2% % | 39 | 0% | 0% | 0% | |
| PTV3 | 2% | 2% | 40% | 0% | 0% | 0% | |
| Table B. IMRT head and neck study — Normalized volume (%) DVH data for normal structures. | ||||||
|---|---|---|---|---|---|---|
| Patient Name | Structure | Trial | > 0.25PD | > 0.50PD | > 0.75PD | > 1.00PD |
| ABC | Brainstem | PTV1 | 77% | 67% | 24% | 0% |
| Brainstem | PTV2 | 55% | 10% | 0% | 0% | |
| Brainstem | PTV3 | 30% | 0% | 0% | 0% | |
| Brainstem | COMP | 71% | 44% | 0% | 0% | |
| Patient Name | Structure | Trial | > 0.25PD | > 0.50PD | > 0.75PD | > 1.00PD |
| ABC | Cord | PTV1 | 94% | 89% | 15% | 0% |
| Cord | PTV2 | 71% | 13% | 0% | 0% | |
| Cord | PTV3 | 56% | 0% | 0% | 0% | |
| Cord | COMP | 89% | 60% | 0% | 0% | |
| Table C. IMRT head and neck study — Absolute volume (cc) DVH data for normal structures. | ||||||
|---|---|---|---|---|---|---|
| Patient Name | Structure | Trial | > 0.25PD | > 0.50PD | > 0.75PD | > 1.00PD |
| ABC | Brainstem | PTV1 | 24.9 | 21.9 | 7.7 | 0.0 |
| Brainstem | PTV2 | 18.0 | 3.4 | 0.0 | 0.0 | |
| Brainstem | PTV3 | 9.8 | 0.0 | 0.0 | 0.0 | |
| Brainstem | COMP | 23.1 | 14.2 | 0.0 | 0.0 | |
| Patient Name | Structure | Trial | > 0.25PD | > 0.50PD | > 0.75PD | > 1.00PD |
| ABC | Cord | PTV1 | 21.3 | 20.0 | 3.5 | 0.0 |
| Cord | PTV2 | 16.0 | 3.0 | 0.0 | 0.0 | |
| Cord | PTV3 | 12.7 | 0.0 | 0.0 | 0.0 | |
| Cord | COMP | 20.2 | 13.6 | 0.0 | 0.0 | |
| Table D. IMRT head and neck study — Min, Max, Mean, and Median doses and critical volume data for normal structures.* | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Patient Name | Structure | Trial | V40 | V50 | V65 | V75 | MIN | MAX | MEAN | MEDIAN |
| ABC | Brainstem | PTV1 | 0% | 0% | 0% | 0% | 280.8 | 3518.6 | 2131.8 | 1754.9 |
| Brainstem | PTV2 | 0% | 0% | 0% | 0% | 66.7 | 937.0 | 420.5 | 466.8 | |
| Brainstem | PTV3 | 0% | 0% | 0% | 0% | 51.9 | 1025.2 | 337.9 | 510.4 | |
| Brainstem | COMP | 31% | 0% | 0% | 0% | 407.9 | 5155.5 | 2890.3 | 2569.7 | |
| Patient Name | Structure | Trial | V40 | V50 | V65 | V75 | MIN | MAX | MEAN | MEDIAN |
| ABC | Cord | PTV1 | 0% | 0% | 0% | 0% | 570.3 | 3211.5 | 2596.5 | 1601.4 |
| Cord | PTV2 | 0% | 0% | 0% | 0% | 26.7 | 927.0 | 511.6 | 461.8 | |
| Cord | PTV3 | 0% | 0% | 0% | 0% | 13.0 | 1029.5 | 467.8 | 512.6 | |
| Cord | COMP | 50% | 0% | 0% | 0% | 603.7 | 5041.3 | 3575.9 | 2512.5 | |
*
V40, V50, V65, and V75 data for PTV1, 2, and 3 plans show 0% because the prescribed dose for each plan was less than 40 Gy.