Table 4 Technical characteristics of RapidArc plans
From: Early clinical experience with volumetric modulated arc therapy in head and neck cancer patients
Number of arcs | 1 (13), 2 (32) |
|---|---|
Arcs length [˚] | 312 ± 42 |
Beam energy | 6 MV |
Delivery time [min] | 1.80 ± 0.62 |
MU/fraction | 458 ± 112 |
MU/Gy | 219 ± 51 |
Dose Rate [MU/min] | 264 ± 88 |
Gantry speed [deg/sec] | 4.8 ± 0.0 |
Collimator angle [˚] | (±)17 ± 6 |
Mean leaf aperture [cm] | 3.0 ± 0.8 |
Mean CP area [cm2] | 44.0 ± 16.8 |
Mean field area [cm2] | 219 ± 93 |
Gamma Agreement Index 3%,3 mm [%] | 96.7 ± 2.1 [90.1, 99.7] |