| |
IMRT
|
SA-VMAT
|
DA-VMAT
|
P(IMRT vs SA-VMAT)
|
P(IMRT vs DA-VMAT)
|
|---|
|
Dmean (Gy)
|
52.0±0.2
|
52.0±0.4
|
51.6±0.2
|
0.167
|
0.001
|
|
D2% (Gy)
|
54.1±0.2
|
54.0±0.8
|
53.1±0.3
|
0.366
|
0.001
|
|
D98% (Gy)
|
49.2±0.3
|
49.3±0.2
|
49.5±0.2
|
0.230
|
0.015
|
|
V95 (%)
|
99.6±0.3
|
99.9±0.1
|
99.9±0.1
|
0.001
|
0.001
|
|
V107 (%)
|
10.2±5.1
|
5.3±3.9
|
0.6±0.4
|
0.017
|
0.001
|
|
CI
|
1.23±0.05
|
1.28±0.07
|
1.21±0.07
|
0.006
|
0.305
|
|
MU
|
499.0±41.6
|
418.5±41.9
|
438.8±31.7
|
0.001
|
0.001
|
|
Treatment time (min)
|
8.0±0.7
|
1.5±0.2
|
3.0±0.3
|
0.001
|
0.001
|
- IMRT: intensity modulated radiotherapy, SA-VMAT: single-arc volumetric modulated arc therapy, DA-VMAT: double-arc volumetric modulated arc therapy, PTV: Planning Target Volume, CI: conformity index, MU: monitor units.
