Table 2.
Average dosimetric results for the fourteen patients
| Structures | Value | SPArc | RO-IMPT | p value |
|---|---|---|---|---|
| ITV | D99%(Gy) | 66 | 66 | N/A |
| D1%(Gy) | 70.9 | 71.1 | 0.22 | |
| Total Lung | V5(%) | 20.4 | 25.0 | 0.001 |
| V10(%) | 16.2 | 20.4 | 0.001 | |
| V20(%) | 12.9 | 16.1 | 0.001 | |
| V30(%) | 10.8 | 13.4 | 0.001 | |
| Mean(Gy) | 7.9 | 9.5 | 0.001 | |
| Cord | D0.03cc(Gy) | 17.8 | 22.4 | 0.04 |
| Heart | V40(%) | 4.4 | 5.0 | 0.03 |
| Mean(Gy) | 4.2 | 4.9 | 0.01 | |
| Esophagus | Mean(Gy) | 12.9 | 14.6 | 0.003 |
| ID | (J) | 72.0 | 77.3 | 0.001 |
| CI | 0.70 | 0.68 | 0.33 | |
| DT (ELST 0.2 s) | (s) | 160.1 | 182.0 | 0.001 |
| DT (ELST 0.5 s) | (s) | 213.8 | 207.9 | 0.22 |
| DT (ELST 1 s) | (s) | 303.4 | 250.9 | 0.001 |
| DT (ELST 2 s) | (s) | 482.5 | 337.1 | 0.001 |
| DT (ELST 4 s) | (s) | 840.8 | 509.4 | 0.001 |
Abbreviations: ITV internal target volume, Cl conformality index, ID integral dose, DT estimated delivery time, ELST energy layer switch time