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《Chinese Journal of Radiology》 2005-01
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Comparative study of three-dimensional reconstructed images after rotational DSA and conventional DSA in the diagnosis and treatment of carotid stenosis

ZHOU Shi, YU Lei, CHEN Xu-guang, XU Guo-bin, WANG Fan, SONG Jie, WANG Xue-jian.Department of Radiology, the Affiliated Hospital of Guiyang Medical College, Guiyang 550004, China  
Objective To compare the clinical value of three-dimensional DSA (3D DSA) and conventional DSA (2D DSA) in the diagnosis and treatment of carotid stenosis.Methods Fifty stenosed carotid arteries in 42 patients confirmed by 2D DSA were performed with rotational angiography and three-dimensional reconstruction, of which 19 patients received both 2D DSA and 3D DSA before and after carotid stenting.The images of 3D and 2D DSA were studied double-blindly by two experienced radiologists.Diameters and cross-sectional areas of the most stenotic and distal nonstenotic vessels were calculated.Linear stenosis rate and area stenosis rate were computed with the method of North American Symptomatic Carotid Endarterectomy Trial (NASCET).Atherosclerotic plaques were observed mainly by means of virtual angioscopy (VA). Results There was no statistically significant difference in linear stenosis rate between 3D DSA and 2D DSA(P0.05).About 68% area stenosis rate of 3D DSA of total cases was significantly greater than the linear stenosis rate of other methods (P0.01).The grade on area stenosis was higher than that on other methods in most vessels.Only 6 of 34 plaques displayed on 3D DSA were demonstrated on 2D DSA(P0.005).There was statistical difference between 3D DSA and 2D DSA in assessing the therapeutic efficacy of carotid stenting (P0.05).Conclusion 3D DSA is more accurate than 2D DSA in evaluating carotid stenosis.3D DSA can offer more valuable information for the diagnosis and treatment of carotid stenosis and assessment for the therapeutic efficacy of carotid stenting.
【CateGory Index】: R816.1
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