Article Figures & Data
Figures
- Fig 1.
An 80-year-old patient with restenosis after carotid endarterectomy of the right ICA. User interface of tool A (AquariusNET): cross-sectional images at the reference site (blue border) and the site of maximal luminal narrowing (red border) are displayed in the left upper quadrant. The maximal and minimal diameters and the vessel area are provided. The stretched vessel views on the right side indicate the position of the cross-sectional images at different viewing angles. The green line represents the center line, which is also shown in the volume-rendered image in the left lower quadrant.
- Fig 2.
Same patient as in Fig 1. User interface of tool B (Vessel View): orthogonal images aligned to the center line on the left side. A volume-rendered 3D model of the MRA with an overlaid curved planar reformation is displayed in the middle. The green line indicates the center line. The stretched vessel views (middle row, bottom) indicate the positions of the stenosis measurements and the reference site. The area measurements are displayed in the volume-rendered image; the values for the stenotic lumen are in the left lower image. All values can be displayed in the “measurements” card. MinDiam indicates minimum diameter; MaxDiam, maximum diameter.
- Fig 3.
Same patient as in Fig 1. User interface of tool C (Vitrea): cross-sectional images aligned perpendicular to the center line surrounding a volume-rendered 3D model of the MRA. The green line indicates the center line. The stretched vessel views on the right side indicate the position of the cross-sectional images at different viewing angles; the site of the (manual) measurements and the corresponding values are given. The stenosis value is displayed in the lower right corner.
- Fig 4.
Scatter and Bland-Altman plots represent the degrees of stenosis in MRA for area (top row) and diameter (bottom row) measurements from both readers of the symptomatic and the contralateral side. The confidence interval is indicated by the gray band. The Pearson correlation coefficients are 0.99 and 0.97 for diameter and area measurements, respectively. S(A) indicates area of stenosis; S(D), diameter of stenosis.
- Fig 5.
Comparison of the modalities for diameter stenosis measurements (S[D]) and area stenosis measurements (S[A]) for the symptomatic side only. The dots indicate the mean difference, and the horizontal lines represent 95% Tukey intervals. The differences between the pairs that do not cross the zero line are statistically significant.
