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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.