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Table 1 Dose-volume indices between CBCT and CT

From: The feasibility of evaluating radiation dose to the heart by integrating kilovoltage-cone beam computed tomography in stereotactic body radiotherapy of early non-small-cell lung cancer patients

Parameter CBCT, ± SEM CT, ± SEM t P
V5Gy-Ra 47.7 ± 16.4% 49.0 ± 16.0% 1.5 0.17
V10Gy-R 18.9 ± 11.7% 17.4 ± 11.8% 2.3 0.03
V15Gy-R 14.4 ± 10.2% 12.8 ± 10.4% 2.3 0.02
V20Gy-R 10.5 ± 9.0% 9.0 ± 8.9% 2.3 0.04
V25Gy-R 6.6 ± 2.8% 4.5 ± 2.3% 3.6 0.01
V30Gy-R 4.2 ± 2.2% 2.5 ± 1.6% 3.7 0.01
V35Gy-R 3.2 ± 1.8% 1.7 ± 1.3% 3.9 0.01
V5Gy-Ab 333.0 ± 78.4 cm3 282.0 ± 61.7 cm3 7.9 0.0001
V10Gy-A 133.0 ± 68.6 cm3 101.0 ± 59.0 cm3 6.8 0.0001
V15Gy-A 102.0 ± 62.6 cm3 74.6 ± 53.7 cm3 6.2 0.0001
V20Gy-A 74.0 ± 55.8 cm3 52.5 ± 46.4 cm3 4.8 0.0001
V25Gy-A 46.0 ± 16.9 cm3 27.0 ± 12.0 cm3 6.2 0.0001
V30Gy-A 30.0 ± 14.4 cm3 15.0 ± 8.7 cm3 5.5 0.0001
V35Gy-A 24.0 ± 12.0 cm3 10.0 ± 7.0 cm3 5.5 0.0001
D50cm3c 19.9 ± 7.7 Gy 17.1 ± 6.3 Gy 4.5 0.0001
D100cm3 15.3 ± 6.2 Gy 12.8 ± 5.7 Gy 3.6 0.003
D150cm3 11.8 ± 5.5 Gy 9.2 ± 3.4 Gy 3.6 0.003
D200cm3 8.2 ± 2.0 Gy 6.8 ± 1.5 Gy 6.2 0.0001
D250cm3 6.4 ± 1.7 Gy 5.2 ± 2.0 Gy 6.5 0.0001
Dmean 7.0 ± 2.8 Gy 6.5 ± 2.4 Gy 3.0 0.009
Dmax 45.7 ± 13.1 Gy 45.1 ± 13.5 Gy 2.9 0.009
  1. a). V5Gy-R means the heart relative volume in the 5Gy region, V10Gy-R, V15Gy-R, V20Gy-R, V25Gy-R, V30Gy-R, and V35Gy-R are of the same mean;
  2. b). V5Gy-A means the heart absolute volume in the 5Gy region, V10Gy-A, V15Gy-A, V20Gy-A, V25Gy-A, V30Gy-A, and V35Gy-A are of the same mean;
  3. c). D50cm3 means the exposure dose in the 50 cm3, D100cm3, D150cm3, D200cm3, and D250cm3 are of the same mean.