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《Journal of Clinical Radilolgy》 2003-01
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Multiple Detector-row Spiral CT Carotid Angiography: A Comparative Study of Different Collimation with Image Quality Evaluation

ZHOU Jianjun, ZHOU Kangrong, CHEN Zuwang,et al. Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai 200032, P. R. China  
Objective To determine the optimal scanning parameters of multiple detector row spiral CT angiography (MDSCTA) for carotid artery by comparing the quality of the images obtained with two scan collimations.Materials and Methods Forty two patients with or without clinical signs of cerebral ischemia or infarction were randomly selected and divided into two groups. During MDSCTA, the collimation of 1.3 mm and 3.2 mm was used for the two groups, respectively. Maximum intensity projection (MIP) and volume rendering (VR) were used for image reconstruction. Based on the marginal sharpness and the branches of the vessels, a general evaluation of the image quality of the carotid arteries was conducted by two experienced radiologists with blind method. A comparison of the image quality between two groups was made. Statistic analysis was carried out with the software of SPSS.Results For MIP, the image quality of 1.3 mm group was superior to that of 3.2 mm group. For VR, the image quality was excellent in both groups, and no obvious difference was seen between two groups.Conclusion For MDSCTA of carotid artery, the general image quality is not only depends on the size of collimation but also on the way of image reconstruction.
【Fund】: 教育部博士点基金资助项目 (基金号 :9741)
【CateGory Index】: R816.2
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