Table 2.
Comparison of RT treatment factors and dosimetry parameters between VMAT and HT in all eligible patients.
| Characteristics | Heart | Left Lung | Whole Lung | Other Normal Organs | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| VMAT (n = 70) |
HT (n = 38) |
p-Value | VMAT (n = 70) |
HT (n = 38) |
p-Value | VMAT (n = 70) |
HT (n = 38) |
p-Value | VMAT (n = 70) |
HT (n = 38) |
p-Value | ||
| Volume (cc) | 536.9 | 505.3 | 0.16 | 952.1 | 933.1 | 0.69 | 2192.0 | 2150.8 | 0.68 | Mean dose (Gy) | |||
| Mean dose (Gy) | 3.82 | 5.13 | <0.001 | 9.99 | 11.16 | 0.054 | 5.57 | 6.32 | 0.006 | Contralateral breast | 2.56 | 3.39 | <0.001 |
| Mean ≤ 4 Gy (%) | 42 (60) | 10 (26.3) | 0.002 | Thyroid | 21.53 | 20.34 | 0.32 | ||||||
| V5 (%) | 13.96 | 28.53 | <0.001 | 40.03 | 52.05 | <0.001 | 20.49 | 27.56 | <0.001 | Trachea | 11.07 | 11.61 | 0.53 |
| V10 (%) | 6.37 | 14.52 | <0.001 | 27.94 | 37.45 | <0.001 | 13.26 | 17.70 | <0.001 | Esophagus | 5.67 | 8.64 | <0.001 |
| V15 (%) | 4.29 | 8.10 | <0.001 | - | - | - | - | - | - | ||||
| V20 (%) | 3.11 | 4.66 | 0.02 | 18.53 | 22.23 | 0.01 | 8.84 | 10.10 | 0.050 | ||||
| V25 (%) | 2.16 | 2.66 | 0.30 | - | - | - | - | - | - | Maximal dose (Gy) | |||
| V30 (%) | 1.46 | 1.49 | 0.92 | - | - | - | - | - | - | Cord | 20.10 | 20.72 | 0.55 |