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Table 3 Summary of agreement estimates for quantitative vascular measurements

From: mDixon ECG-gated 3-dimensional cardiovascular magnetic resonance angiography in patients with congenital cardiovascular disease

Cross-sectional Vessel Diameter

mDixon

Mean (SD)

bSSFP

Mean (SD)

Bias

(95% CI)

Lower LOA

(95% CI)

Upper LOA

(95% CI)

Aortic Root (mm)

29.4 (9.4)

29.6 (8.8)

0.09

(−0.58; 0.76)

−2.87

(−4.03; −1.71)

3.05

(1.89; 4.21)

Ascending Aorta (mm)

27.0 (8.9)

26.0 (9.8)

−0.22

(−1.02; 0.59)

−3.86

(−5.25; − 2.47)

3.42

(2.03; 4.82)

Main Pulmonary Artery/Conduit (mm)

22.6 (6.5)

22.0 (6.6)

−0.20

(−1.18; 0.78)

− 4.30

(−6.00; − 2.09)

3.9

(2.20; 5.60)

Left Pulmonary Artery (mm)

15.6 (4.4)

16.2 (5.1)

0.95

(− 0.18; 2.09)

−4.05

(− 6.02; − 2.09)

5.96

(3.99; 7.93)

Right Pulmonary Artery (mm)

15.3 (4.0)

15.3 (4.2)

− 0.09

(− 0.93; 0.76)

− 3.91

(− 5.38; − 2.45)

3.74

(2.27; 5.20)

Descending Aorta (isthmus) (mm)

16.7 (4.8)

16.5 (4.8)

−0.32

(− 0.92; 0.28)

−2.98

(− 4.03; − 1.94)

2.35

(1.30; 3.39)

Left Anterior Descending Coronary Artery (mm)

3.8 (0.9)

3.8 (0.8)

0.03

(− 0.19; 0.24)

− 0.84

(− 1.21; − 0.47)

0.90

(0.52; 1.27)

Superior Vena Cava (mm)

16.4 (4.1)

15.9 (4.7)

−0.48

(− 1.00; 0.04)

−2.83

(− 3.73; − 1.93)

1.88

(0.98; 2.78)

  1. Abbreviations: mDixon modified-Dixon; bSSFP balanced steady state free precision; SD standard deviation, CI confidence interval, LOA limit of agreement
  2. Bias reflects mean difference for bSSFP - mDixon. LOA calculated as 1.96 x SD