Table 2.
Dosimetric characteristics
| Dosimetric measure | Mean (SD) | Median (IQR) |
|---|---|---|
| PTV V100 (%) |
93.5 (5.7) |
95.5 (8.7) |
| PTV D90 (Gy) |
38.8 (7.3) |
41.2 (5.3) |
| Urethra V100 (cm3) |
0.46 (0.18) |
0.44 (0.18) |
| Urethra V120 (cm3) |
0.16 (0.14) |
0.15 (0.23) |
| Urethra V125 (cm3) |
0.08 (0.09) |
0.03 (0.14) |
| Urethra V150 (cm3) |
0.0 (0.0) |
0.0 (0.0) |
| Rectal V70 (cm3) |
0.1 (0.1) |
0.08 (0.005) |
| Rectal V80 (cm3) | 0.006 (0.02) | 0.00 (0.005) |
Abbreviations: IQR interquartile range, PTV planning target volume, PTV V 100 percentage of PTV receiving ≥100% of prescribed dose, D 90 dose administered to 90% of the PTV, urethral V 100 -V 150 absolute urethral volume that received a dose ≥100%, 120%, 125%, 150% of the prescribed dose, rectal V 70 -V 80 absolute rectal volume that received a dose ≥70% or 80%, of the prescribed dose.