Table 3 Plan parameter comparison between vIMPT and SPArc
From: Feasibility study: spot-scanning proton arc therapy (SPArc) for left-sided whole breast radiotherapy
Plan parameters | vIMPT | SPArc | Absolute difference (SPArc − vIMPT) |
|---|---|---|---|
Beam directions | 1 | 39 | 38 |
Total energy layers | 27 ± 3.85 | 93 ± 4.57 | 66 ± 6.95 |
Total monitor unit | 6143 ± 1281.08 | 5511 ± 1233.95 | − 633 ± 140.91 |
Total delivery time (5 s) | 758 ± 144.17 | 1059 ± 123.77 | 301 ± 30.34 (p < 0.001) |
Total delivery time (4 s) | 732 ± 141.3 | 967 ± 126.08 | 235 ± 24.17 (p < 0.001) |
Total delivery time (3 s) | 706 ± 138.53 | 874 ± 128.50 | 169 ± 18.41 (p < 0.001) |
Total delivery time (2 s) | 680 ± 135.79 | 782 ± 131.04 | 102 ± 13.64 (p < 0.001) |
Total delivery time (1 s) | 654 ± 133.11 | 690 ± 133.68 | 36 ± 11.18 (p < 0.001) |
Total delivery time (0.5 s) | 641 ± 131.79 | 644 ± 135.03 | 3 ± 11.35 (p = 0.47) |
Total delivery time (0.2 s) | 633 ± 131.00 | 616 ± 135.86 | − 17 ± 11.93 (p = 0.005) |