MSCT下肢动脉血管成像扫描方案优化及血管质量观察

发布时间：2018-03-26 12:09

本文选题：CT血管成像　切入点：下肢　出处：《兰州大学》2013年硕士论文

【摘要】：目的探讨128螺旋CT下肢动脉血管成像中不同管电流、层厚、注射剂量、注射流率与图像质量的相关性,以确定最佳扫描方案。资料与方法60例行下肢动脉血管造影检查患者,分为优化组10例；另分5组,每组其它参数固定：其中高毫安组(400mA)10例,低毫安组(200mA)10例,大层厚组(5mm)10例,多造影剂组(130ml)10例,高注射流率组(4.5ml/s)10例,所有患者记录扫描延迟时间,测量腹主动脉水平、股深浅动脉分差水平、胫前后动脉上段水平、足背动脉水平CT值,评价各组的图像质量分布情况,并与优化组间进行对比。结果优化组分别与高毫安组、多造影剂组、高注射流率组各组进行图像质量比较均无统计学差异(P0.05)；优化组分组与低毫安组、大层厚组组间比较,其图像质量经统计学分析差异有统计学意义(P0.05)。结论使用条件：管电流300mA,层厚0.625mm,注射流率4ml/s,注射剂量100ml,图像质量优良率高,完全满足诊断需求。
[Abstract]:Objective to study the correlation between different tube current, slice thickness, injection dose, injection flow rate and image quality in 128 spiral CT angiography of lower extremity artery. 10 cases were divided into 5 groups, each group was fixed with other parameters: 10 cases in high Ma group, 10 cases in low Ma group, 10 cases in large thickness group, 10 cases in multicontrast medium group, 10 cases in high injection rate group, 10 cases in 4.5ml / s group. Abdominal aorta level, superficial femoral artery difference level, anterior and posterior tibial artery level, CT value of dorsal foot artery level were measured to evaluate the distribution of image quality in each group, and compared with the optimized group. There was no significant difference in image quality among the groups of multi-contrast medium group and high injection rate group (P 0.05), and there was no significant difference between the optimized group and the low Ma group and the large layer thick group. The difference of image quality was statistically significant (P 0.05). Conclusion: the operating conditions are: tube current 300 Ma, layer thickness 0.625 mm, injection flow rate 4 ml / s, injection dose 100 ml, image quality excellent and good rate high, fully meet the need of diagnosis.
【学位授予单位】：兰州大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：R816.2

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