Table 5.
Dosimetric results for organ at risks
| Parameter | IMRT (Mean±SD) | IMRT (Mean±SD) with sparing rectum | 3DCRT (Mean±SD) box technique | 3DCRT (Mean±SD) field and field technique |
|---|---|---|---|---|
| Rectum 50.83±13.93 cm3 | ||||
| Dmean (Gy) | 38.59±0.72 | 38.02±0.56 | 47.48±0.50 | 46.29±0.73 |
| D60 (Gy) | 37.7±1.2 | 33.52±0.9 | 48.8±1.1 | 47.50±0.5 |
| V30 cm3 | 34.85±15.0 | 33.95±14.08 | 47.2±17.3 | 47.01±17.13 |
| V35 cm3 | 26.10±12.1 | 25.74±11.2 | 46.69±16.95 | 45.23±15.7 |
| V40 cm3 | 21.69±7.8 | 20.729±8.87 | 43.97±15.5 | 41.1±13.28 |
| Small Bowel 337.968±138.136 cm3 | ||||
| D5 (Gy) | 47.1±2.5 | 46.94±3.53 | 48.3±1.3 | 47.2±1.4 |
| D30 (Gy) | 31.84±1.8 | 31.42±2.51 | 28.65±0.55 | 28.10±0.54 |
| Dmean (Gy) | 25.69±3.6 | 25.57±3.9 | 24.05±1.17 | 23.35±0.58 |
| V30 (cm3) | 190.89±96.5 | 184.59±108.5 | 140.46±52.2 | 133.93±58.7 |
| V35 (cm3) | 125.56±65.5 | 121.448±75.78 | 91.125±34.79 | 84.48±40.87 |
| V40 (cm3) | 86.56±42.1 | 80.97±53.2 | 68.3±28.05 | 60.85±31.11 |
| V45 (cm3) | 54.53±29.9 | 51.82±37.96 | 48.07±20.92 | 41.27±23.04 |
| Left Femoral Head 56.101±14.45 cm3 | ||||
| Dmean (Gy) | 27.61±0.19 | 22.15±0.21 | 29.98±0.16 | 30.55±0.335 |
| V30 cm3 | 16.35±0.21 | 2.82±0.51 | 10.84±0.17 | 26.63±4.42 |
| D15 (Gy) | 27.91±0.18 | 27.19±0.42 | 30.60±0.54 | 33.50±0.65 |
| Right Femoral Head 57.03±10.68 cm3 | ||||
| Dmean (Gy) | 23.51±1.2 | 24.20±1.3 | 31.05±1.57 | 31.11±1.34 |
| V30 cm3 | 7.97±2.1 | 3.06±1.8 | 10.67±1.6 | 18.28±1.56 |
| D15 (Gy) | 32.17±1.6 | 28.57±1.7 | 30.60±1.6 | 35.70±1.3 |
| Bladder 394.26±121.20 cm3 | ||||
| D5 (Gy) | 51.20±0.6 | 51.25±0.5 | 51.60±0.7 | 51.10±0.5 |
| Dmean (Gy) | 31.85±1.2 | 31.33±1.4 | 42.65±1.6 | 41.31±1.7 |
| D35 (Gy) | 44.58±0.5 | 39.01±0.2 | 50.60±0.4 | 49.60±0.7 |
| V30 cm3 | 172.75±46.23 | 155±50.64 | 257.32±69.29 | 230.15±60.0 |
| V35 cm3 | 154.0±41.75 | 135.31±38.02 | 213.16±57.41 | 205.14±45.01 |
| V40 cm3 | 133.71±36.0 | 116±36.0 | 191.76±51.7 | 176.13±54.1 |
| V45 cm3 | 107.45±28.91 | 91±20.13 | 172.40±46.4 | 160.5±40.5 |
IMRT: Intensity modulated radiotherapy, SD: Standard deviation, 3DCRT: Three dimensional conformal therapy