| 王金淮,曾晓庄.磁共振血流图技术[J].中国医学影像技术,1990,6(1):4~6 |
| 磁共振血流图技术 |
| The Technology of Magnetic Resonance Angiograph |
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| DOI： |
| 中文关键词: 血流图技术 血管 血流成像 磁共振血流成像 磁共振成像 |
| 英文关键词:angiography technology blood vessels blood flow imaging (MRA)Magnetic Resonance Angiography Magnetic Resonance Imaging (MRI). |
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| 中文摘要: |
| 引言由于血流的流动性在MRI中血流与静态组织有很多不同的表现,利用这些表现,可以得到仅有血管(血流)而无静态组织的图像,这种图像称为磁共振血流图(MR angiograph;MRA)。MRA的应用价值大体上可在三个方面表现:得到血管网络分布,可以用来研究血管形态。 |
| 英文摘要: |
| Magnetic Resonance Angiography (MRA) is introduced, which is a kind of technology of MRI applied in blood flow. MRA shows only the blood flow and suppresses the static tissue. Various aspects about this technology such as potential clinical application, background, methods and pluse sequences are presented, The techniqes of MRA have been developed today and fallen into two classes. The first class is the time-of-flight methods which tag a bolus of material in one region and detect in another region. The second class is the phase contrast methods which rely on motion-induced phase shifts in transverse spin magnetization. The present difficulties in MRA are presented and discussed. |
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