Table 1.
Treatment plan dosimetric goals for target volume parameters and formulas applied.
| Target volume | Parameter | Prescription or formula |
|---|---|---|
| DIL = CTV(boost) | V95% | 100% of PDboost to 95% CTV(boost) |
| PTV(boost) | V98% | 100% of PDboost to 98% PTV(boost) |
| Whole prostate = CTV(Prostate) |
V95% | 100% of PD to 95% CTV(Prostate) |
| PTV(Prostate) | V95% | 100% of PD to 95% PTV(Prostate) |
| Dmax | < 120% | |
| CI | ≤ 1.5; CI= V95%/PTV | |
| HI | No limits; HI=Dmax/PD | |
| GI | No limits; GI=PIV50%/PIV | |
| Monitor units | MU | No limits |
DIL, dominant intraprostatic lesion; CTV, clinical target volume; PTV, planning target volume; V, volume; PDboost, boost prescription dose; PD, prescription dose; Dmax, maximum dose; CI, conformity index; HI, homogeneity index; GI, gradient index; PIV prescribed isodose volume.