Table 4.
Planning aims and dose constraints for the six clinics, the clinics are denoted as letters from A to F. Clinic B changed methods during the audit and provided two answers: B1, the old method and B2, the new method
| Volume | A | B1 | B2 | C | D | E | F |
|---|---|---|---|---|---|---|---|
| PTV | D100% = 10 Gy | Dmin = 10 Gy | Dmin = 10 Gy | V100% > 95% | V100% > 95% | V100% > 95% | |
| V150% < 55% | V120% < 70-75% | ||||||
| V150% < 30-35% | |||||||
| D90% > 9.5 Gy | |||||||
| CTV | – | – | – | D90% > 100% | – | – | V100% > 97% |
| D100% > 90% | |||||||
| Urethra | Dmax < 12 Gy | Dmax < 10 Gy | Dmean ≤ 11 Gy | Dmax < 120% | Dmax < 11 Gy | Dmax < 12 Gy | Dmax < 110% |
| Dmax < 11.5 Gy | D0.1cc < 11.4 Gy | ||||||
| Rectum | D2cc < 7.5 Gy | Dmax < 6 Gy | Dmax < 6 Gy | Dmax < 80% | Dmax < 7 Gy | Dmax < 8 Gy | D10% < 65% |
| D2cc < 60% | D2cc < 5.5 Gy | ||||||
| Bladder | – | – | – | – | – | Dmax < 7.5 Gy | – |
| D2cc < 5 Gy |