Table 2.
Comparison of stage III VMAT and hybrid-VMAT plans
| Study | Method | N | Dprescibed [Gy] | VPTV [cm3] | MLD [Gy] | V20Gy [%] | V5Gy [%] | V5Gy-cont [%] |
|---|---|---|---|---|---|---|---|---|
| De Bree-Balk et al. [14]1 |
VMAT |
20 |
66 |
8385 |
20.0 |
36.6 |
NA |
69.6 |
| Verbakel et al. [15]2 |
VMAT |
14 |
66 |
779 |
NA |
30.3 ± 5.7 |
NA |
44.6 ± 9.0 |
| |
H-VMAT |
14 |
66 |
779 |
NA |
30.1 ± 5.8 |
NA |
36.2 ± 15.0 |
| Chan et al. [16]3 |
VMAT |
24 |
60 |
508 |
14.4 ± 2.9 |
25.4 ± 6.0 |
64.0 ± 15.4 |
NA |
| |
H-VMAT |
24 |
60 |
508 |
14.0 ± 2.9 |
23.3 ± 5.3 |
59.5 ± 16.7 |
NA |
| This study4 |
VMAT |
73 |
66 |
344 |
12.4 ± 3.5 |
19.3 ± 6.8 |
46.6 ± 10.6 |
35.6 ± 7.1 |
| This study4VPTV > 500 cm3 | VMAT | 13 | 66 | 678 | 14.5 ± 2.1 | 22.1 ± 6.4 | 52.1 ± 10.3 | 38.7 ± 10.0 |
Average values and standard deviations are given.
1[14] Use the volume of both lungs minus CTV for MLD and V20Gy; PTV V95% > 99% and PTV V107% < 1%.
2[15] Use the volume of both lungs minus PTV for V20Gy; PTV V95% > 97% and PTV V107% < 5%.
3[16] Use the volume of both lungs minus PTV for MLD, V20Gy and V5Gy; D98% > 57.0 Gy and D2% < 64.2 Gy.
4 This study uses the volume of both lungs minus ITV for MLD, and volume of both lungs minus PTV for V20Gy and V5Gy.
PTV V90% > 99% and PTV V110% ≤ 1%.
5 Median instead of average value is given.