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Table 2 Effect of smoothing parameters on interobserver variability for STE strain measurements in the radial, circumferential and longitudinal direction

From: Is strain by Speckle Tracking Echocardiography dependent on user controlled spatial and temporal smoothing? An experimental porcine study

  MINIMUM DEFAULT MAXIMUM
  Mean difference Ric Mean difference Ric Mean difference Ric
Radial direction       
Anterior segment -2.2 ± 5.7 0.98 -1.9 ± 5.3 0.98 -1.6 ± 5.7 0.98
Posterior segment 4.4 ± 7.1 0.61 3.3 ± 6.3 0.68 2.0 ± 5.2 0.75
Global -0.3 ± 3.9 0.97 0.1 ± 4.1 0.97 0.1 ± 4.0 0.97
Circumferential direction       
Anterior segment 0.4 ± 2.4 0.95 0.1 ± 4.1 0.97 0.1 ± 4.0 0.97
Posterior segment 0.3 ± 3.3 0.74 -0.8 ± 2.6 0.73 -0.9 ± 2.1 0.78
Global -0.6 ± 1.4 0.97 -0.8 ± 1.5 0.96 -0.8 ± 1.1 0.97
Longitudinal direction       
Anterior segment 0.5 ± 3.9 0.85 -0.4 ± 1.7 0.97 -0.7 ± 1.7 0.97
Posterior segment 1.9 ± 3.5 0.82 1.3 ± 2.4 0.85 1.1 ± 2.4 0.85
Global 0.2 ± 2.4 0.88 0.3 ± 2.4 0.87 0.1 ± 2.1 0.90
  1. Mean difference ± SD. n = 14. Ric = intra-class correlation coefficient; Minimum = minimum spatial and temporal smoothing; Default = factory default spatial and temporal smoothing; Maximum = maximum spatial and temporal smoothing.