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• W2004087364 abstract "Rationale and Objectives. The geometry of stenosed carotid bifurcations was analyzed to determine average representations for several stenosis grades. Methods. Film angiograms of 62 patients with internal carotid artery stenoses were digitized. Residual lumen boundaries were manually outlined. The outlines were processed with a computer to extract geometric measurements. The measurements were grouped according to stenosis grade and used to create average representations. Results. Accuracy and precision of the outlining technique were ±0.020 common carotid diameters (CCD) and ±0.025 CCD, respectively. Maximum narrowing of the internal carotid artery occurred at 0.3 CCD ± 1.5 (mean ± standard deviation) distal to the flow divider. The region of significant narrowing extended axially 1.2 CCD ± 1.0. Poststenotic dilatations were observed, with enlargement of 1.3 ± 0.7 times the normal diameter of the distal internal carotid artery. A tendency toward smaller bifurcation angles with increasing stenosis severity was observed. Conclusion. Three-dimensional geometric models could be created for carotid bifurcations that were disease free (normal) and of arbirary stenosis grade. The geometry of stenosed carotid bifurcations was analyzed to determine average representations for several stenosis grades. Film angiograms of 62 patients with internal carotid artery stenoses were digitized. Residual lumen boundaries were manually outlined. The outlines were processed with a computer to extract geometric measurements. The measurements were grouped according to stenosis grade and used to create average representations. Accuracy and precision of the outlining technique were ±0.020 common carotid diameters (CCD) and ±0.025 CCD, respectively. Maximum narrowing of the internal carotid artery occurred at 0.3 CCD ± 1.5 (mean ± standard deviation) distal to the flow divider. The region of significant narrowing extended axially 1.2 CCD ± 1.0. Poststenotic dilatations were observed, with enlargement of 1.3 ± 0.7 times the normal diameter of the distal internal carotid artery. A tendency toward smaller bifurcation angles with increasing stenosis severity was observed. Three-dimensional geometric models could be created for carotid bifurcations that were disease free (normal) and of arbirary stenosis grade." @default.
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• W2004087364 date "1996-11-01" @default.
• W2004087364 modified "2023-10-18" @default.
• W2004087364 title "Geometric characterization of stenosed human carotid arteries" @default.
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• W2004087364 doi "https://doi.org/10.1016/s1076-6332(96)80297-2" @default.
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