Table 1.
The range, mean and standard deviation (SD) of the target motion represented by the movement of the centroid of the clips in free breathing and breath-hold conditions
| SI(mm) | LR (mm) | AP (mm) | ||
|---|---|---|---|---|
| Free breathing |
Max |
20.0 |
5.8 |
12.5 |
| Min |
2.8 |
0.8 |
2.2 |
|
| Mean |
11.1 |
1.9 |
5.5 |
|
| SD |
3.1 |
1.0 |
2.5 |
|
| Margin |
20.4 |
4.9 |
13.0 |
|
| Breath hold |
Max |
10.1 |
3.5 |
8.1 |
| Min |
1.0 |
0.3 |
0.8 |
|
| Mean |
3.7 |
1.6 |
2.8 |
|
| SD |
2.0 |
0.8 |
1.7 |
|
| Margin | 9.7 | 5.0 | 7.9 |
The margin for target motion was calculated using three times of the SD. All data are calculated from the entire group of the patients.