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Table 3 Dosimetric parameters for brain tissue for conventional volumetric modulated arc therapy (C-VMAT) and HyperArc VMAT (HA-VMAT) plans

From: HyperArc VMAT planning for single and multiple brain metastases stereotactic radiosurgery: a new treatment planning approach

Dosimetric parameter All (n = 23) Single-isocentric C-VMAT cases (n = 15) Multi-isocentric C-VMAT cases (n = 8)
C-VMAT HA-VMAT p-value C-VMAT HA-VMAT p-value C-VMAT HA-VMAT p-value
Mean SD Mean SD Mean SD Mean SD Mean SD Mean SD
V16Gy 5.3 3.8 3.8 2.8 <0.01 4.7 2.6 3.3 1.9 0.01 6.4 5.5 4.5 4.1 0.01
V14Gy 7.7 5.7 5.5 3.9 <0.01 6.8 3.9 4.8 2.7 0.01 9.5 8.1 6.7 5.6 0.01
V12Gy 11.3 8.4 7.9 5.6 <0.01 10.0 5.9 6.9 3.9 0.01 13.8 11.9 9.7 7.8 0.01
V10Gy 17.1 12.8 11.6 8.0 <0.01 15.3 9.5 10.2 5.8 0.01 20.5 17.7 14.3 11.2 0.01
V8Gy 27.0 20.6 17.9 12.4 <0.01 24.4 15.9 15.8 9.0 0.01 32.1 27.9 22.0 17.1 0.01
V6Gy 45.5 33.8 29.5 21.1 <0.01 41.0 28.0 25.5 14.6 0.01 53.8 43.7 37.0 29.5 0.01
V4Gy 86.9 62.3 58.1 48.0 <0.01 78.1 55.7 47.7 28.6 0.01 103.3 74.2 77.4 70.4 0.01
V2Gy 205.1 123.7 196.4 166.7 0.09 185.8 118.7 143.0 93.5 <0.01 241.2 132.8 296.4 228.7 0.09