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Table 1 Residual distance between dwell positions after catheter-based and marker-based registration, averaged over all patients

From: Prostate volume and implant configuration during 48 hours of temporary prostate brachytherapy: limited effect of oedema

  

Catheter-based registration

 

Marker-based registration

 
  

Mean (mm)

1 SD (mm)

RMS of σpat

Mean (mm)

1 SD (mm)

RMS of σpat

  

Δ

Σ

σ

Δ

Σ

σ

CT1-CT2

Absolute

1.67

0.58

1.07

2.46

0.70

1.28

 

L-R

0.00

0.06

0.64

−0.35

0.45

1.01

 

C-C*

−0.11

0.19

1.72

0.22

1.44

1.83

 

D-V**

−0.01

0.09

0.75

0.01

0.62

1.05

CT1-CT3

Absolute

1.63

0.47

0.94

2.39

0.70

0.95

 

L-R

0.01

0.04

0.67

−0.15

0.65

0.97

 

C-C*

−0.22

0.20

1.61

−0.05

1.20

1.63

 

D-V**

−0.02

0.06

0.76

0.02

0.71

1.12

CT2-CT3

Absolute

1.21

0.37

0.83

1.91

0.74

1.02

 

L-R

0.00

0.02

0.46

0.17

0.45

0.72

 

C-C*

−0.05

0.46

1.27

−0.19

1.18

1.46

 

D-V**

−0.01

0.04

0.53

0.05

0.49

0.87

  1. Δ = Overall mean (mean of all δ).
  2. Σ = Standard deviation of the means.
  3. σ = Root-mean-square, quadratic mean of all standard deviations from all patients.
  4. Data shown in absolute shifts and in the 3 separate directions.
  5. *Positive values in C-C indicate a caudal shift.
  6. **Positive values in D-V indicate a ventral shift.