Table 3.
Comparison of intra-operative planning values with post-implant means without spacers from different institutions
| Parameter | Intra-operative | Institute 1 | Institute 2 | Institute 3 |
|---|---|---|---|---|
| GTV (cc) | 0.8 | 0.9 | 0.7 | 0.8 |
| GTV D90% (Gy) | 265 | 246 | 208 | 251 |
| GTV V100% (%) | 99 | 90 | 100 | 100 |
| GTV V150% (%) | 50 | 44.7 | 68.9 | 85.3 |
| GTV V200% (%) | 26 | 26.2 | 42.4 | 47.9 |
| CTV (cc) | 11 | 9.9 | 11.4 | 2.3 |
| CTV D90% (Gy) | 213.9 | 216.6 | 211.9 | 210.4 |
| CTV V100% (%) | 91.3 | 84.3 | 96.6 | 99.9 |
| CTV V150% (%) | 43.8 | 50.1 | 70.2 | 79.3 |
| CTV V200% (%) | 20.9 | 29.2 | 47.1 | 46.5 |
| Prostate volume (cc) | 36.8 | 37.1 | 38 | 37 |
| Prostate D90% (Gy) | 66 | 57 | 55.3 | 57 |
| Prostate V100% (%) | 32 | 32.4 | 45.1 | 50.4 |
| Ratio volume CTV focal/prostate | 0.30 | 0.26 | 0.29 | 0.06 |
| Urethra D0.1cc (Gy) | 280 | 217.9 | 201.8 | 206.3 |
| Urethra D10 (Gy) | 247 | 197.8 | 196.3 | 195.7 |
| Urethra D30 (Gy) | 199 | 166.2 | 166.7 | 163.7 |
| Rectum D2cc (Gy) | 68 | 46.7 | 37 | 35.7 |
| Rectum D1cc (Gy) | 81 | 55.7 | 43.5 | 42 |
| Rectum D0.1cc (Gy) | 114 | 76.3 | 57 | 55.4 |
| Rectum mean (Gy) | 29 | 25.5 | 21.1 | 20.1 |
| Rectum max dose (Gy) | 145 | 86.7 | 62.5 | 62.2 |