Table 5.
DVH parameters for HR-CTV and OARs. Doses are shown as WP + HDR-BT in EQD2 dose. The EQD2 is calculated using α/β = 10 for HR-CTV and α/β = 3 for OAR
| Variablea | Median (range) |
|---|---|
| HR-CTV (EQD2 10 Gy) | |
| D98 | 62.4 Gy (51.6–76.2) |
| D90 | 70.0 Gy (62.8–83.7) |
| D50 | 102.6 Gy (89.4–119.3) |
| Rectum (EQD2 3 Gy) | |
| D0.1cc | 74.7 Gy (42.9–105.7) |
| D2cc | 57.1 Gy (39.8–72.1) |
| Bladder (EQD2 3 Gy) | |
| D0.1cc | 89.9 Gy (57.4–119.3) |
| D2cc | 68.9 Gy (46.5–84.9) |
| Sigmoid (EQD2 3 Gy) | |
| D0.1cc | 71.9 Gy (45.2–89.7) |
| D2cc | 57.2 Gy (39.2–71.2) |
| Point A (EQD2 10 Gy) | 67.2 Gy (60.9–95.0) |
| Rectum DICRU (EQD2 3 Gy) | 61.3 Gy (40.2–121.1) |
| Bladder DICRU (EQD2 3 Gy) | 50.7 Gy (35.5–89.4) |
aWP = whole-pelvis external beam radiotherapy; EQD2 = equivalent dose in 2 Gy per fraction; ICRU = International Commission on Radiation Units and Measurements.