Table 2 Comparison of maximum 2D cine CMR vs 3D self nav CMR aortic root diameters

Mean diameter 2D cine (mm)

36.2

38.5

35.8

38.2

Mean diameter 3D self nav (mm)

37.2

39.7

37.3

39.5

Mean difference (mm)

− 1.0

− 1.2

− 1.6

− 1.3

95% Limits of agreement (mm)

− 5.5 to 3.5

− 4.7 to 2.3

− 4.7 to 1.4

− 5.0 to 2.4

Standard deviation (mm)

2.3

1.8

1.5

1.9

Variance (mm²)

5.2

3.2

2.0

3.6

Pearson’s correlation (r)

0.945

0.951

0.985

0.964

P value (t-test)

0.006

 < 0.001

0.001

0.009