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Table 1 Strain and torsion calculated from standard and high resolution DENSE MRI

From: High resolution cine displacement encoding with stimulated echoes (DENSE) at 3T with navigator feedback for quantification of cardiac mechanics

  Standard Resolution High Resolution Bias (Mean Difference) 95% Limits of Agreement
Circumferential Strain (%)     
Transmural average -20 ± 4 -19 ± 4 -1 ± 3
Subepicardial -15 ± 3 -15 ± 4 -1 ± 2
Midwall -20 ± 4 -19 ± 4 -1 ± 3
Subendocardial -25 ± 4 -23 ± 4 -2 ± 4
Radial Strain (%)     
Transmural average 35 ± 12 45 ± 13 -10 ± 21
Subepicardial 38 ± 13 44 ± 12 -6 ± 20
Midwall 41 ± 13 52 ± 18 -11 ± 30
Subendocardial 23 ± 15 36 ± 18 -13 ± 27
Longitudinal Strain (%)     
Transmural average -15 ± 2 -13 ± 3 -2 ± 5
Subepicardial -15 ± 2 -14 ± 3 -1 ± 5
Midwall -15 ± 2 -13 ± 3 -2 ± 6
Subendocardial -16 ± 2 -13 ± 3 -2 ± 6
Torsion (degrees/cm)     
Transmural average 3.5 ± 1 3.5 ± 1 0.1 ± 1
Subepicardial 2.7 ± 1 2.7 ± 1 -0.1 ± 1
Midwall 3.5 ± 1 3.5 ± 1 0.0 ± 1
Subendocardial 4.5 ± 1 4.1 ± 1 0.3 ± 1
  1. Strain and torsion values are reported as mean ± standard deviation. Bland-Altman 95% limits of agreement are provided for the bias.