Table 3.
Comparison of RT treatment factors and dosimetry parameters between VMAT and HT in patient subgroup of RNI with IMN.
| Characteristics | Heart | Left Lung | Whole Lung | Other Normal Organs | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| VMAT (n = 39) |
HT (n = 24) |
p-Value | VMAT (n = 39) |
HT (n = 24) |
p-Value | VMAT (n = 39) |
HT (n = 24) |
p-Value | VMAT (n = 39) |
HT (n = 24) |
p-Value | ||
| Volume (cc) | 544.5 | 510.8 | 0.30 | 949.2 | 907.1 | 0.73 | 2199.0 | 2089.7 | 0.45 | Mean dose (Gy) | |||
| Mean dose (Gy) | 4.43 | 5.80 | 0.002 | 10.30 | 11.23 | 0.11 | 6.02 | 6.82 | 0.006 | Contralateral breast | 2.92 | 3.71 | <0.001 |
| V5 (%) | 18.31 | 34.44 | <0.001 | 40.80 | 54.56 | <0.001 | 22.31 | 30.48 | <0.001 | Thyroid | 22.08 | 19.58 | 0.02 |
| V10 (%) | 8.18 | 17.11 | <0.001 | 28.80 | 38.93 | <0.001 | 14.36 | 19.14 | <0.001 | Trachea | 10.93 | 10.94 | 0.72 |
| V15 (%) | 5.44 | 9.28 | 0.004 | - | - | - | - | - | - | Esophagus | 5.74 | 8.71 | <0.001 |
| V20 (%) | 3.82 | 5.23 | 0.13 | 19.21 | 22.74 | 0.04 | 9.69 | 10.61 | 0.72 | ||||
| V25 (%) | 2.59 | 2.89 | 0.61 | - | - | - | - | - | - | Maximal dose (Gy) | |||
| V30 (%) | 1.77 | 1.60 | 0.45 | - | - | - | - | - | - | Cord | 20.19 | 20.17 | 0.88 |