Table 3 Dosimetric parameters of OARs and delivery efficiency for whole and partial arc plans on the Trilogy and Halcyon
T-4arc | T-8arc | H-4arc | H-8arc | p < 0.05 | |
|---|---|---|---|---|---|
Heart | |||||
V5 (%) | 20.4 ± 6.2 | 13.7 ± 4.9 | 30.5 ± 6.2 | 49.2 ± 4.5 | a,b,c,d |
V10 (%) | 8.5 ± 3.3 | 8.0 ± 3.7 | 10.2 ± 2.9 | 15.0 ± 6.4 | – |
V20 (%) | 3.4 ± 1.5 | 4.0 ± 2.4 | 2.7 ± 1.3 | 5.8 ± 4.0 | b |
V30 (%) | 1.1 ± 0.6 | 1.8 ± 1.7 | 0.8 ± 0.5 | 2.7 ± 2.8 | b,c |
V40 (%) | 0.2 ± 0.2 | 0.6 ± 0.9 | 0.1 ± 0.1 | 1.1 ± 1.8 | b,c |
Dmean (Gy) | 4.9 ± 0.6 | 3.9 ± 1.1 | 5.6 ± 0.6 | 7.1 ± 1.6 | a,b,c,d |
LV | |||||
V5 (%) | 34.2 ± 10.3 | 23.9 ± 7.6 | 35.7 ± 9.3 | 48.9 ± 14.8 | a,c |
V10 (%) | 17.5 ± 6.6 | 15.5 ± 6.6 | 16.1 ± 5.9 | 22.9 ± 9.8 | – |
V20 (%) | 7.6 ± 3.0 | 9.1 ± 5.2 | 5.8 ± 2.7 | 12.0 ± 7.7 | b |
V30 (%) | 2.7 ± 1.3 | 4.7 ± 4.0 | 1.9 ± 1.0 | 6.5 ± 6.2 | b,c |
V40 (%) | 0.5 ± 0.5 | 1.6 ± 2.0 | 0.2 ± 0.1 | 2.9 ± 4.1 | a,b,c |
Dmean (Gy) | 6.9 ± 1.3 | 6.0 ± 2.0 | 6.8 ± 1.1 | 9.2 ± 3.0 | b |
LAD | |||||
V5 (%) | 85.7 ± 14.5 | 76.0 ± 11.4 | 84.6 ± 13.4 | 89.3 ± 8.7 | – |
V10 (%) | 61.6 ± 16.5 | 63.6 ± 16.9 | 63.2 ± 17.2 | 67.5 ± 16.6 | – |
V20 (%) | 43.3 ± 17.7 | 47.5 ± 21.8 | 43.1 ± 19.1 | 52.9 ± 21.7 | – |
V30 (%) | 24.2 ± 15.5 | 25.7 ± 20.5 | 14.3 ± 10.9 | 31.2 ± 18.2 | b |
V40 (%) | 1.2 ± 1.5 | 6.5 ± 15.4 | 0.1 ± 0.3 | 9.8 ± 15.9 | b |
Dmax (Gy) | 40.4 ± 4.2 | 41.9 ± 4.2 | 38.9 ± 3.1 | 42.5 ± 4.4 | b |
Dmean (Gy) | 18.1 ± 4.7 | 19.0 ± 6.3 | 17.2 ± 4.0 | 21.3 ± 5.8 | b |
Lungs | |||||
V5 (%) | 45.1 ± 3.1 | 30.4 ± 3.5 | 43.7 ± 4.1 | 49.1 ± 4.7 | a,b,c |
V10 (%) | 23.9 ± 2.6 | 19.4 ± 2.6 | 22.9 ± 2.6 | 25.5 ± 2.9 | a,c |
V20 (%) | 13.4 ± 2.2 | 12.4 ± 2.6 | 13.2 ± 2.5 | 15.8 ± 3.0 | – |
V30 (%) | 7.9 ± 1.8 | 8.5 ± 2.3 | 8.0 ± 2.1 | 10.6 ± 3.0 | – |
V40 (%) | 3.2 ± 1.1 | 5.0 ± 1.9 | 3.5 ± 1.4 | 6.0 ± 2.5 | a,b |
Dmean (Gy) | 9.1 ± 0.7 | 7.5 ± 1.0 | 9.1 ± 0.8 | 9.2 ± 3.0 | a,c |
Skin | |||||
V30 (%) | 67.3 ± 8.7 | 68.9 ± 8.2 | 74.2 ± 7.6 | 75.2 ± 6.9 | c,d |
V40 (%) | 31.3 ± 7.9 | 32.4 ± 8.5 | 40.4 ± 8.8 | 41.5 ± 7.3 | c,d |
V45 (%) | 7.9 ± 3.7 | 9.3 ± 3.7 | 16.8 ± 4.3 | 17.5 ± 3.3 | c,d |
V50 (%) | 0.0 ± 0.1 | 0.0 ± 0.0 | 0.3 ± 0.2 | 0.5 ± 0.5 | c,d |
Dmean (Gy) | 33.9 ± 2.0 | 34.3 ± 1.9 | 36.0 ± 1.9 | 36.3 ± 1.6 | c,d |
Liver | |||||
Dmean (Gy) | 5.7 ± 1.5 | 3.9 ± 1.1 | 6.0 ± 1.1 | 6.7 ± 1.5 | a,c |
MU | 1170.8 ± 97.3 | 1051.5 ± 70.1 | 1036.1 ± 103.8 | 831.6 ± 45.2 | a,b,d |
Delivery time (min) | 6.1 ± 0.6 | 6.0 ± 0.9 | 2.2 ± 0.2 | 2.2 ± 0.4 | c,d |