Table 2.
Summary of the dosimetric parameters
| Variables | |
|---|---|
| Normal liver volume (cm3) |
|
| Median (Range) |
1159.2 (488.3–1907.1) |
| Mean ± SD |
1169.2 ± 266.7 |
| GTV (cm3) |
|
| Median (Range) |
8.6 (0.6–125.3) |
| Mean ± SD |
15.9 ± 19.3 |
| PTV (cm3) |
|
| Median (Range) |
40.8 (11.9–296.9) |
| Mean ± SD |
57.7 ± 50.0 |
| Dose (Gy/number of fractions) |
|
| 30 / 3 – 40 / 4 |
31 (33.7%) |
| 45 / 3 – 48 / 4 |
38 (41.3%) |
| 60 / 3 – 60 / 4 |
23 (25.0%) |
| No. of ports |
|
| Median (Range) |
7 (5–9) |
| Mean liver dose (Gy) |
|
| Median (Range) |
8.3 (1.2–20.4) |
| Mean ± SD |
8.7 ± 3.7 |
| D33%* (Gy) |
|
| Median (Range) |
7.3 (0.31–28.4) |
| Mean ± SD |
8.4 ± 5.1 |
| D50%† (Gy) |
|
| Median (Range) |
3.9 (0.2–16.3) |
| Mean ± SD | 4.6 ± 3.7 |
Abbreviations:SD standard deviation, GTV gross tumor volume, PTV planning target volume.
*Dose to 33% of the normal liver.
†Dose to 50% of the normal liver.