14
16
17
22
23
5
7
15
21
1
2
3
6
8
9
10
11
12
13
LAT
x
y
1
2
3
10
8
9
11
12
13
14
16
17
22
23
5
7
15
20
18
21
6
AP
z
y
1 cm
18
20
x
Attached
From Seppenwoolde et al., IJROBP 2002 53:822-834
Respiration motion (not to scale)