SELECTIVE MAGNETIC-RESONANCE ANGIOGRAPHY OF THE HEAD

被引：12

作者：

MATTLE, HP

WENTZ, KU

机构：

[1] Department of Neurology, Inselspital, Bern

[2] Department of Radiology., Klinikum Mannheim, University of Heidelberg

[3] Neurologische Klinik, Inselspital, Bern

来源：

CARDIOVASCULAR AND INTERVENTIONAL RADIOLOGY | 1992年 / 15卷 / 01期

关键词：

MAGNETIC RESONANCE ANGIOGRAPHY; ARTERIOGRAPHY; VENOGRAPHY; CEREBRAL BLOOD VESSELS; THROMBOSIS;

D O I：

10.1007/BF02733901

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

Selective magnetic resonance angiography (MRA) is a combination of two- or three-dimensional MRA with radiofrequency presaturation pulses. Presaturation pulses can be applied over user-defined regions. They reduce or eliminate signals within the presaturation slab. As a result, blood flowing within or through the presaturation slab turns dark whereas blood flowing outside and not through the presaturation slab still appears bright. Using this technique, flow direction and origin of flow can be determined and flowing blood can be differentiated from stationary bright tissues such as thrombus. Arteries and veins can be imaged selectively due to their usually opposite flow direction. The intracranial collateral circulation about the circle of Willis can be shown, and vessels feeding or draining arteriovenous malformations can be identified more accurately. In conclusion, selective MRA can provide functional information about the cerebrovascular system, which cannot be obtained from conventional MR imaging (MRI) or MRA alone.

引用

页码：65 / 70

页数：6

共 14 条

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