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. 2019 Aug 24;20(9):20–30. doi: 10.1002/acm2.12697

Table 3.

Mean values and relative standard deviations calculated for the different dosimetric indicators in the case of MR‐Linac, IMRT, and VMAT traditional Linac.

Parameter MR‐Linac VMAT IMRT
Mean value σ Mean value σ Mean value σ
CTV
V95 (%) 99.63 0.62 99.73 0.67 99.77 0.83
V105 (%) 0.34 0.50 0.00 0.00 0.00 0.00
D2% (Gy) 41.29 0.34 40.60 0.18 40.58 0.24
D98% (Gy) 38.90 0.44 39.25 0.51 39.31 0.57
TV
V10Gy (cc) 823.99 567.85 778.02 520.32 699.93 577.55
V20Gy (cc) 204.30 154.02 214.57 153.89 181.01 152.00
V38Gy (cc) 58.64 50.86 57.45 48.66 57.20 50.15
PTV
V95 (%) 97.76 1.96 98.54 1.53 98.62 1.69
V105 (%) 0.31 0.46 0.00 0.01 0.03 0.11
D2% (Gy) 41.26 0.35 40.66 0.18 40.77 0.23
D98% (Gy) 37.85 0.87 38.28 1.08 38.41 1.03
Duodenum
V33Gy (cc) 0.42 0.43 0.31 0.39 0.36 0.43
V25Gy (cc) 1.90 2.12 2.07 2.51 2.50 3.38
Stomach
V33Gy (cc) 0.20 0.33 0.14 0.36 0.18 0.33
V25Gy (cc) 1.52 2.10 2.11 4.45 1.88 3.53
Bowel bag
V33Gy (cc) 0.16 0.28 0.15 0.55 0.09 0.25
V25Gy (cc) 1.47 2.37 0.71 1.89 0.94 2.52
Right kidney
V12Gy (%) 3.75 7.16 2.28 4.74 2.45 3.76
Left kidney
V12Gy (%) 3.37 6.16 0.83 2.47 1.69 4.33
Liver
V12Gy (%) 4.44 5.54 3.78 4.81 4.07 5.05
Dosimeter indicators
CI (PTV) 1.20 0.08 1.23 0.10 1.17 0.11
HI (CTV) 0.07 0.04 0.03 0.01 0.03 0.02
HI (PTV) 0.09 0.03 0.06 0.03 0.06 0.03
GI 4.27 0.99 4.69 1.21 3.81 0.88