磁共振三维动态增强技术参数对血管成像质量的影响  

The evaluation of the effect of 3D dynamic contrast enhancement MRA technical parameter on image quality

作　　者：吴何嘉[1] 王秀河[1] 史长征[1] 陈汉芳[1] 

机构地区：[1]暨南大学附属第一医院医学影像中心,广东广州510630

出　　处：《暨南大学学报（自然科学与医学版）》2007年第4期414-417,共4页Journal of Jinan University(Natural Science & Medicine Edition)

摘　　要：目的:探讨三维动态增强血管成像(3D dynamic contrast enhancement magnetic resonance angiography,3DDCE MRA)技术参数对图像质量的影响。方法:106例行三维动态增强血管造影检查的病例,分为三组分别采用以下方法成像:①智能(smart)跟踪法;②test小剂量测试法;③经验法。同时将可变参数进行对比,采用SPSS 10.0统计软件,卡方检验和秩和检验对数据进行处理。结果:三组间图像质量差异具有显著性(P=0.038)。测试法成像质量优率最高。K空间中心充填和K空间顺序充填对图像质量的影响差异具有显著性(P=0.015),K空间中心充填图像质量好于K空间顺序充填。结论:3种3D DCE MRA成像方法中,test小剂量团注测试法是3D-DCE MRA成像最佳的延时时间计算方法,其成像质量最佳。高质量的3D DCE MRA图像依赖于患者的配合、合理的扫描序列及参数选择、最佳扫描延迟时间的把握、合理的造影剂剂量和注射速度。Aim： To evaluate the effect of3D DCE MRA （3D dynamic contrast enhancement magnetic resonance angiography） technical parameter on image quality. Methods： One hundred and six cases of 3D-DCE-MRA were classified into 3 groups： smart tracing method, small dosage test method and experiential method and were compared, applying with SPSS 10. 0 statistical software, chi-square test and rank sum test. Results： The difference of image quality among these three group were obvious （ P = 0. 038 ） with greatest excellent imaging rate in the small dosage test group, and image quality with K-space center filling was better than that with K-space sequence filling. Conclusion：Of the three 3D DCE MRA, small dosage bolus injection test method is the best delay timing method with the imaging quality; excellent quality of 3D DCE MRA imaging depend upon patient＇s cooperation, rational scanning sequence and parameter selected, the decision of the best delay timing , appropriate contrast medium dosage and injection speed.

关 键 词：磁共振成像 三维动态血管成像 扫描参数 扫描技术 

分 类 号：R455.2[医药卫生—运动医学]