Table 2 Dosimetric parameters of the treatment plans
Step & Shoot | Helical Tomotherapy | All Patients | |
|---|---|---|---|
41 patients | 21 patients | 62 patients | |
Mean value ± SD | Mean value ± SD | Mean value ± SD | |
Target volume (PTV) | |||
Mean Dose [Gy] | 52.1 ± 2.3 | 53.5 ± 0.5 | 52.6 ± 2.0 |
Standard Deviation [Gy] | 3.5 ± 1.5 | 2.4 ± 1.2 | 3.1 ± 1.5 |
V95% [%] | 85.3 ± 5.3 | 92.3 ± 5.2 | 87.6 ± 6.2 |
V90% [%] | 93.3 ± 3.8 | 94.2 ± 3.9 | 94.2 ± 3.9 |
Contralateral Lung | |||
Mean Lung Dose [Gy] | 7.6 ± 2.2 | 7.0 ± 1.2 | 7.4 ± 2.0 |
V5Gy [%] | 66.2 ± 23.0 | 71.5 ± 18.6 | 67.9 ± 21.6 |
V20Gy [%] | 1.7 ± 1.9 | 0.7 ± 1.3 | 1.4 ± 1.8 |
Liver (right-sided MPM) | |||
Mean Dose [Gy] | 21.9 ± 3.9 | 26.4 ± 3.8 | 23.4 ± 4.4 |
V30Gy [%] | 24.7 ± 8.3 | 33.5 ± 7.8 | 27.5 ± 9.0 |
Liver (left-sided MPM) | |||
Mean Dose [Gy] | 9.1 ± 2.3 | 10.4 ± 1.5 | 9.6 ± 2.1 |
V30Gy [%] | 2.0 ± 2.5 | 2.5 ± 2.7 | 2.2 ± 2.5 |
Heart | |||
V45Gy [%] | 7.3 ± 7.5 | 12.4 ± 6.1 | 9.0 ± 7.4 |
Ipsilateral kidney | |||
Mean Dose [Gy] | 9.9 ± 5.1 | 9.3 ± 2.5 | 9.7 ± 4.4 |
V15Gy [%] | 23.4 ± 23.2 | 16.5 ± 13.0 | 21.0 ± 20.4 |
Contralateral kidney | |||
Mean Dose [Gy] | 3.1 ± 1.6 | 4.5 ± 1.5 | 3.6 ± 1.7 |
V15Gy [%] | 0.1 ± 0.2 | 0.3 ± 0.6 | 0.2 ± 0.4 |
Spinal Cord | |||
Maximum Dose [Gy] | 36.0 ± 5.7 | 37.3 ± 5.3 | 36.4 ± 5.5 |
Esophagus | |||
V55Gy [%] | 0.9 ± 1.7 | 2.2 ± 2.4 | 1.4 ± 2.1 |