| |
CT registered to CBCT
|
MRI registered to CBCT
|
|---|
| |
AP (cm)
|
SI (cm)
|
LR (cm)
|
AP (cm)
|
SI (cm)
|
LR (cm)
|
|---|
|
Patient 1
|
0.21 ± 0.28
|
0.04 ± 0.25
|
0.04 ± 0.29
|
−0.07 ± 0.25
|
0.11 ± 0.11
|
0.03 ± 0.27
|
|
Patient 2
|
0.49 ± 0.30
|
−0.02 ± 0.54
|
0.07 ± 0.36
|
0.44 ± 0.28
|
0.03 ± 0.54
|
0.04 ± 0.33
|
|
Patient 3
|
0.04 ± 0.61
|
0.06 ± 0.53
|
0.06 ± 0.51
|
0.01 ± 0.76
|
0.23 ± .58
|
0.01 ± 0.48
|
|
Patient 4
|
0.10 ± 0.23
|
0.18 ± 0.24
|
−0.08 ± 0.26
|
0.02 ± 0.15
|
0.02 ± 0.15
|
0.00 ± 0.00
|
|
Patient 5
|
0.17 ± 0.32
|
0.28 ± 0.22
|
−0.06 ± 0.36
|
0.27 ± 0.47
|
0.42 ± 0.27
|
−0.15 ± 0.38
|
|
Patient 6
|
0.26 ± 0.42
|
0.02 ± 0.24
|
0.16 ± 0.19
|
−0.02 ± 0.33
|
0.10 ± 0.20
|
0.10 ± 0.18
|
|
Patient 7
|
−0.06 ± 0.49
|
−0.18 ± 0.88
|
0.11 ± 0.64
|
−0.63 ± 0.49
|
−0.11 ± 0.86
|
0.15 ± 0.64
|
|
Patient 9
|
−0.33 ± 0.28
|
−0.10 ± 0.16
|
0.30 ± 0.25
|
−0.28 ± 0.29
|
−0.02 ± 0.11
|
0.29 ± 0.27
|
|
Patient 10
|
0.36 ± 0.30
|
0.05 ± 0.15
|
−0.32 ± 0.31
|
0.19 ± 0.29
|
0.04 ± 0.14
|
−0.31 ± 0.33
|
|
M
|
0.14
|
0.04
|
0.03
|
−0.01
|
0.09
|
0.02
|
|
Σ
|
0.24
|
0.14
|
0.17
|
0.31
|
0.15
|
0.17
|
|
σ
|
0.38
|
0.43
|
0.38
|
0.41
|
0.41
|
0.36
|
|
Margin
|
0.87
|
0.64
|
0.69
|
1.06
|
0.66
|
0.68
|
|
Margin
†
|
0.85
|
0.53
|
0.67
|
0.84
|
0.57
|
0.64
|
- M is the mean group error, Σ is the inter-patient uncertainty and σ is the inter-fraction uncertainty. The sigma values are used to calculate the needed CTV-PTV margin using the van Herk formalism.
-
† Margin not including patient 7, see discussion section.
