Table 3.
Radiation therapy characteristics
| Radiation therapy | N | % |
|---|---|---|
|
IOERT dose |
|
|
| 10 Gy |
3 |
10 |
| 12 Gy |
8 |
26 |
| 15 Gy |
20 |
65 |
|
IOERT energy |
|
|
| 6 MeV |
21 |
68 |
| 8 MeV |
8 |
26 |
| 10 MeV |
2 |
6 |
|
IOERT cone |
|
|
| circle-shaped |
13 |
42 |
| squizzle-shaped |
18 |
58 |
| median size |
9 cm |
|
| min size |
5 cm |
|
| max size* |
22 cm |
|
|
EBRT total dose |
|
|
| < 40 Gy |
1 |
3 |
| 40-50.4 Gy |
29 |
85 |
| > 50.4** | 4 | 12 |
n: number of patients,%: percentage (IOERT n = 31, EBRT n = 34), IOERT: Intraoperative electron radiation therapy, EBRT: external beam radiation therapy, Gy: Gray, MeV: mega electron volts, cm: centimeter, min: minimum, max: maximum, *: sum of multiple fields, **: one patient received two additional fractions for compensation of a planned treatment break for a total dose of 54 Gy, three patients without IORT boost received a total dose of 60 Gy.