三维超高场7T高分辨磁敏感加权像静脉造影(英文)

被引：13

作者：

Samuel Barnes ^{[1
]}

Samantha Heller ^{[2
]}

Daniel KSodickson ^{[2
]}

EMark Haacke ^{[1
]}

Robert IGrossman ^{[2
]}

机构：

[1] Department of Radiology,The MRI Institute for Biomedical Research,Detroit,MI ,USA

[2] Center for Biomedical Imaging,Department of Radiology,New York University Langone Medical Center,New York,NY ,USA

来源：

磁共振成像 | 2010年 / 1卷 / 02期

关键词：

磁共振成像; 高场强; 静脉造影术; 磁敏感加权成像; 相位; 脑;

D O I：

暂无

中图分类号：

R445.2 [核磁共振成像];

学科分类号：

100231 [临床病理学];

摘要：

目的超高场磁共振具有高信噪比和独特的磁敏感对比,使其在无创性脑血管造影尤其是对小静脉的检测有明显优势。本文探讨如何在超高场磁共振7T优化和获取高质量的磁敏感加权像(SWI)静脉造影。方法选择10例正常志愿者作为研究对象,采集一系列7TSWI静脉造影数据并与3T结果作对比。选择参数TR=30～45ms,TE=13～26ms,带宽(BW)=80～140Hz/pixel,翻转角(FA)=10～25?;所有的数据用同样的图像后处理方式得到最小信号叠加投影(mIP)的SWI静脉造影像,并进行定量化分析。结果图像优化后,我们得到高分辨率的7T静脉造影图像。根据静脉血的T2*选择优化TE:16ms(7T),28ms(3T);FA:15?(3T和7T)。相对于3T,7TSWI图像有较高的信噪比和静脉与周围组织的对比度,并显示出更多的微小静脉。结论超高场SWI静脉造影对于显示微小静脉具有明显的优势。

引用

页码：83 / 93

页数：11

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