兰州大学机构库 >学院待认领
MSCT下肢动脉血管成像扫描方案优化及血管质量观察
Alternative TitleEvaluation of the optimized scanning program and observation imaging blood vessels in the MSCT lower extremity arterial imaging
铁萍
Thesis Advisor徐香玖
2013-05-24
Degree Grantor兰州大学
Place of Conferral兰州
Degree Name硕士
KeywordCT血管成像 下肢 动脉 优化 血管显示
Abstract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(P>0.05);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(P<0.05)。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。
Other AbstractObjective To investigate the correlation between different tube current, slice thickness, injection dose, injection flow rate and image quality in 128 spiral CT lower extremity arterial angiography to determine the best scanning program. Materials and Methods A total of 60 patients in lower extremity arterial angiography. The control groups (5 groups,50 cases, 83.3%, other parameters are fixed) and optimized group (10 cases, 16.7%). Control groups include: high milliampere group of (400mA, 10 cases, 16.7%), low milliampere group (200mA, 10 cases, 16.7%), large thickness group (5mm, 10 cases of 16.7% ), multi-contrast agent group (30ml, 10 patients, 16.7%), a high injection flow rate group (4.5 ml / s, 10 patients, 16.7%).Recording all patient scan delay time, measurement of the level of the abdominal aorta, shares the depth of the level of arterial points difference, before and after tibial artery segment level, the level of CT values of the dorsalis pedis artery. Evaluate the image quality of the distribution of each group, compared with optimized group.Result Comparative the quality of scanned images between optimized group and the respective control groups. The level of the quality images was better in the optimized group respectively compared to the low mA group and large thickness group(P <0.05),but no significant difference in optimized group respectively compared to high mA group, multi-contrast agent group and the high injection flow rate group (P> 0.05). Conclusion Optimization group (tube current of 300mA, thickness 0.625mm, the injection flow rate of 4ml / s, the injected dose 100ml) has excellent image quality ,which reached diagnostic criterion in MSCT lower extremity arterial imaging.
URL查看原文
Language中文
Document Type学位论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/224027
Collection学院待认领
Affiliation临床医学院
Recommended Citation
GB/T 7714
铁萍. MSCT下肢动脉血管成像扫描方案优化及血管质量观察[D]. 兰州. 兰州大学,2013.
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