Table 2 Comparison of dosimetric parameters for irradiation of bladder cancer and normal organs at risk (OARs) by using different treatment techniques.
From: Intensity modulated radiotherapy for elderly bladder cancer patients
| Â | Â | IMRT | HT | 2DRT | P value |
|---|---|---|---|---|---|
PTV | UI | 1.09 ± 0.01 | 1.01 ± 0.01 | 1.10 ± 0.03 | IMRT vs. HT: p = 0.001 2DRT vs. IMRT: p = 0.19 2DRT vs. HT: p = 0.002 |
|  | CI | 1.22 ± 0.06 | 1.20 ± 0.03 | 3.17 ± 1.01 | IMRT vs. HT: p = 0.19 2DRT vs. IMRT: p < 0.001 2DRT vs. HT: p < 0.001 |
Right Femoral head (V30) | mean (%) | 35.0 ± 0.2 | 6.0 ± 0.1 | 73.7 ± 19.7 | IMRT vs. HT: p = 0.001 2DRT vs. IMRT: p < 0.001 2DRT vs. HT: p < 0.001 |
Left Femoral head (V30) | mean (%) | 26.5 ± 0.3 | 6.1 ± 0.1 | 71.1 ± 22.9 | IMRT vs. HT: p = 0.03 2DRT vs. IMRT: p < 0.001 2DRT vs. HT: p < 0.001 |
Rectum | mean (Gy) | 34.3 ± 9.1 | 25.4 ± 5.9 | 50.4 ± 8.1 | IMRT vs. HT: p = 0.019 2DRT vs. IMRT: p < 0.001 2DRT vs. HT: p < 0.001 |
|  | V55Gy < 50% (%) | 4.7 ± 9.6 | 1.4 ± 2.8 | 46.1 ± 36.8 | IMRT vs. HT: p = 0.28 2DRT vs. IMRT: p = 0.001 2DRT vs. HT: p < 0.001 |
Intestine | mean (Gy) | 29.2 ± 9.3 | 20.7 ± 6.6 | 40.2 ± 13.2 | IMRT vs. HT: p = 0.034 2DRT vs. IMRT: p = 0.034 2DRT vs. HT: p < 0.001 |
|  | 250 c.c. < 45 Gy (c.c.) | 25.9 ± 30.1 | 10.8 ± 11.9 | 192.6 ± 132.6 | IMRT vs. HT: p = 0.16 2DRT vs. IMRT: p = 0.001 2DRT vs. HT: p < 0.001 |