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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.