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Table 1 Summary statistics (all 15 subjects) showing good agreement for encoding frequency between 0.04 and 0.10 cycles/mm. Larger biases, 95% LOA, and CoV were observed for encoding frequency of 0.02 cycles/mm.

From: Low encoding frequencies accurately quantify cardiac mechanics while minimizing phase wrapping in 2D cine DENSE with through-plane dephasing

E(ke) * Circumferential Strain Radial Strain Twist (Degrees)
  Bias 95% LOA Mean CoV p-value Bias 95% LOA Mean CoV p-value Bias 95% LOA Mean CoV p-value
E(0.10) - E(0.02) -1.9% ±5.3% 10% 0.02** 3.1% ±21.9% 22% 0.31 -0.50 ±1.89 12% 0.07
E(0.10) - E(0.04) 0.0% ±3.2% 4% 1.00 -1.0% ±13.5% 10% 0.57 -0.02 ±1.26 7% 0.91
E(0.10) - E(0.06) 0.6% ±2.9% 4% 0.15 0.6% ±11.2% 10% 0.69 -0.19 ±0.79 4% 0.09
E(0.10) - E(0.08) 0.3% ±3.0% 4% 0.45 -1.8% ±9.7% 9% 0.19 -0.05 ±0.71 4% 0.59
Inter-test -0.3% ±2.0% 3% 0.23 0.4% ±12.1% 10% 0.81 0.00 ±0.93 5% 0.99
  1. *Represents peak strain and twist measured using a particular encoding frequency.
  2. **Statistical significance between peak measures of mechanics using paired-sample t-test at significance level α = 0.05.
  3. ***LOA - Limits of Agreement, CoV - Coefficient of Variation.