Table 2.
Values for the minimum, maximum, median, and standard deviation (SD) across the population (N = 18) for beam range (cm), energy (MeV) and width of the modulated range or spread out Bragg peak (SOBP) (cm)
| |
|
Cranial fields |
Spinal fields |
||
|---|---|---|---|---|---|
| Upper | Middle | Lower | |||
| Range (cm) |
Min - Max |
14.7-20.60 |
8.5-15.4 |
6.6-13.6 |
7.6-16 |
| |
Median |
17.0 |
10.9 |
12.3 |
11.1 |
| |
SD |
1.3 |
1.9 |
2.7 |
2.2 |
| |
|
|
|
|
|
| Energy (MeV) |
Min - Max |
180-225 |
140-200 |
140-200 |
140-200 |
| |
Median |
200 |
160 |
180 |
160 |
| |
SD |
12 |
17 |
18 |
17 |
| | |||||
| SOBP (cm) |
Min - Max |
15-16 |
4-7 |
4-8 |
4-7 |
| |
Median |
16 |
5 |
5 |
6 |
| SD | 1 | 1 | 2 | 1 | |
Energy values correspond to set energy steps of 140 MeV, 160 MeV, 180 MeV, 200 MeV, and 225 MeV. Abbreviation in this table: spread out Bragg peak (SOBP).