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Table 1 Results of the qualitative measurements

From: Non-contrast MR angiography at 1.5 Tesla for aortic monitoring in Marfan patients after aortic root surgery

Qualitative Reading and Technique Reader 1 Reader 2 ICC
Overall aortic image quality
2D bSSFP n % n % 0.63 [0.45–0.76]
 Score 1 – Poor 0 0.0 0 0.0
 Score 2 – Reduced 2 3.1 3 4.7
 Score 3 – Good 11 17.2 20 31.3
 Score 4 – Excellent 51 79.7 41 64.1
 Median score 4 4
3D CE-CMRA N % n % 0.56 [0.37–0.71]
 Score 1 – Poor 0 0.0 0 0.0
 Score 2 – Reduced 1 1.6 1 1.6
 Score 3 – Good 10 15.6 16 25.0
 Score 4 – Excellent 53 82.8 47 73.4
 Median score 4 4
P (Wilcoxon) 0.37 0.16  
Artifact scoring at the aortic root
2D bSSFP n % n % 0.81 [0.62–0.90]
 Score 1 - Severe 2 3.1 2 3.1
 Score 2 - Moderate 4 6.3 6 9.4
 Score 3 - Minor 9 14.1 20 31.3
 Score 4 - Absent 49 76.6 36 56.3
 Median score 4 4
3D CE-CMRA n % n %  
 Score 1 - Severe 0 0.0 0 0.0 0.65 [0.46–0.78]
 Score 2 - Moderate 0 0.0 7 10.9
 Score 3 - Minor 14 21.9 11 17.2
 Score 4 - Absent 50 78.1 46 71.9
 Median score 4 4
P (Wilcoxon) 0.18 0.12  
  1. Categorial rating of non-contrast 2D–balanced steady state free precession (bSSFP) imaging and 3D contrast-enhanced cardiovascular magnetic resonance angiography (CE-CMRA) regarding diagnostic image quality and image artifacts was performed using Likert scales. The scoring data of the two readers are given as absolute frequencies and percentages. Wilcoxon signed rank test was used to intraindividually compare the two sequence techniques. P < .05 indicated significant differences. The Intraclass Correlation Coefficient (ICC) was used to assess the interrater agreement. Its 95% confidence interval is given in square brackets