Table 2.
Dosimetric parameters for PTV
| Parameters | IMRT (N) | IMRT (BM) | IMRT (OC) | IMRT (OC + LS) |
|---|---|---|---|---|
| Dmin (Gy) | 46.13 ± 1.79 | 44.28 ± 1.80* | 43.77 ± 2.23* | 42.70 ± 2.03*† |
| Dmax (Gy) | 53.78 ± 0.28 | 54.25 ± 0.36* | 54.45 ± 0.38* | 54.92 ± 0.40*† |
| Dmean (Gy) | 51.59 ± 0.10 | 51.68 ± 0.07* | 51.65 ± 0.07* | 51.71 ± 0.09* |
| CI | 0.87 ± 0.02 | 0.89 ± 0.01* | 0.88 ± 0.02† | 0.87 ± 0.02† |
| HI | 0.06 ± 0.00 | 0.06 ± 0.00* | 0.06 ± 0.00* | 0.07 ± 0.00*† |
Abbreviations: HI Homogeneity index, CI Conformity index, Dmin the minimum dose, Dmax the maximum dose, Dmean the mean dose, IMRT (N) without bone marrow as avoidance structures, IMRT (BM) whole bone marrow as avoidance structures, IMRT (OC) os coxae as avoidance structures, IMRT (OC + LS) both os coxae and lumbosacral spine as avoidance structures
*p value < 0.05 while comparing IMRT (N) plan with other three plans
†p value < 0.05 while comparing IMRT (BM) plan with IMRT (OC) and IMRT (OC + LS) plans, respectively