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Table 2 Mean TT, MU-number, CI and HI for the three planning systems

From: A fast radiotherapy paradigm for anal cancer with volumetric modulated arc therapy (VMAT)

  3D-CRT VMAT '2Rot' IMRT (MC Hyperion) IMRT (PB Hyperion) IMRT (PB Corvus)
HI 1.06 ± 0.02 1.11 ± 0.02 1.11 ± 0.08 1.10 ± 0.02 1.15 ± 0.03
CI 2.00 ± 0.16 1.39 ± 0.09 1.30 ± 0.02 1.26 ± 0.05 1.33 ± 0.21
MU 225 ± 11 268 ± 19 748 ± 193 477 ± 84 1260 ± 172
TT 220s 290s 610s 570s 575s
VTissue 10% PD 10739 cm3 ≡ 48.8% 10463 cm3 ≡ 47.6% 10806 cm3 ≡ 48.1% 10347 cm3 ≡ 46.0% 10591 cm3 ≡ 47.5%
VTissue 30% PD 8187 cm3 ≡ 37.3% 7674 cm3 ≡ 34.9% 7593 cm3 ≡ 33.8% 7199 cm3 ≡ 32.0% 7874 cm3 ≡ 35.3%
VTissue 50% PD 6052 cm3 ≡ 27.6% 5089 cm3 ≡ 23.1% 4203 cm3 ≡ 18.7% 3971 cm3 ≡ 17.7% 5186 cm3 ≡ 23.2%
VTissue 70% PD 3428 cm3 ≡ 15.6% 2734 cm3 ≡ 12.4% 1939 cm3 ≡ 8.6% 1933 cm3 ≡ 8.6% 2612 cm3 ≡ 11.7%
VTissue 95% PD 982 cm3 ≡ 4.5% 208 cm3 ≡ 0.9% 14 cm3 ≡ 0.0% 0 cm3 ≡ 0.0% 53 cm3 ≡ 0.2%
D95% Vol Tissue 1.97 Gy ≡ 5.46% 0.75 Gy ≡ 2.09% 0.35 Gy ≡ 0.98% 0.31 Gy ≡ 0.85% 0.52 Gy ≡ 1.45%
D95% Vol PTV 34.09 Gy ≡ 94.7% 33.84 Gy ≡ 94% 33.05 Gy ≡ 91.8% 32.95 Gy ≡ 91.54% 32.33 Gy ≡ 89.8%