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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.