Article Figures & Data
Figures
- Fig 1.
Illustrative case of a 61-year-old female with family history of aneurysmal subarachnoid hemorrhage. MR angiography revealed a left ICA terminus aneurysm. Catheter angiography demonstrated a 2.5 mm aneurysm having a 2 mm neck (A, frontal oblique projection) that subsequently underwent stent assisted coil embolization (B, frontal oblique projection). Pre-embolization 3DRA (C) and post-embolization CBCT (D) are used to isolate a 3D model of the stented artery (pre-embolization, E; post-embolization, F). The centerlines of the stented vascular segment pre and post stent-assisted coiling are extracted in G and H, respectively.
- Fig 2.
The best-fit polynomial (green line) of the resampled centerline data (blue triangles) is used to calculate the radii of curvature before (top) and after (bottom) stent implantation.
- Fig 3.
Rotational angiography (A) and contrast-enhanced CBCT (B) of 1 of the vascular phantoms. Bland-Altman plot (C) of the differences in the radii of curvature measured based on data obtained from each imaging technique (bold dashed line is the mean difference; dotted lines are the limits of the agreement).
- Fig 4.
A, Box-and-whisker plots showing the radii of curvature before and after stent implantation (***, P < .0001, paired t test). B, Histogram of the increase of the radii of curvature from pre- to post-stent implantation.
- Fig 5.
Box-and-whisker plot of the change in the radius of curvature due to stent implantation based on the anatomic location of the aneurysm.
- Fig 6.
Linear regression analysis of the effect of packing attenuation on changes in the radius of the curvature of the stented segment (P > 0.05; R2 = 0.002).
Tables
Patient demographics and aneurysm information
Demographics/Aneurysms Patients 24 Aneurysms 24 Females 18 (75.0%) Mean age (yr) 49.5 Age range (yr) 18–68 Presentation/indications for treatment Headache/incidental 15 (62.5%) Recurrent after coiling 7 (29.2%) Stroke/transient ischemic attack 2 (8.3%) Aneurysm dimensions Mean aneurysm dome size (SEM) (mm) 5.6 (0.8) Mean aneurysm neck size (SEM) (mm) 4.8 (0.7) Dome/neck ratio (SEM) (%) 1.2 (0.09) Aneurysm location ACA 2 (8.3%) AcomA 3 (12.5%) ICA 16 (67.7%) ICA terminus 3 (12.5%) -
Note:—SEM indicates standard error of the mean; AcomA, anterior communicating artery.
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