The Role of MR Angiography in Diagnosing Cerebral Arteriovenous Malformation
- VernacularTitle:MRA对脑动静脉畸形的再评价
- Author:
Yuzhong ZHANG
;
Xuelin ZHANG
;
Renmin CHANG
- Publication Type:Journal Article
- Keywords:
magnetic resonance angiography;
digital subtraction angiography;
arteriovenous malformation;
cerebral vascular disease
- From:
Journal of Practical Radiology
2001;0(06):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To summarize MR manifestations of cerebral arteriovenous malformations (AVMs), and to evaluate the accuracy of MR angiography in determining cerebral AVMs’ aspects. Methods Thirty-six cases of cerebral AVMs were analyzed comparatively between MRA and DSA in sizes, feeding arteries and draining veins. Results Cerebral AVMs were appeared in every part of brain. MRI showed honeycombed and linear flow-void low intensity signal in lesion area, showed flow-void signal of expanded thickening vessels, and showed cerebral atrophy or fraction surrounding the lesions. MRA showed that the sizes of most AVMs were 2～5 cm, that the feeding arteries originate from the expansion of original feeding arteries of these areas, that the draining veins drain from the lesions into the surrounding veins or sinuses. The numbers of these vessels were related positively to the sizes of lesions. The differences in showing AVMs between MRA and DSA were that the sizes of lesions on MRA were more than those on DSA, and the numbers of draining veins on MRA were more than those on DSA. Conclusion MRA may show all signs of AVMs, and is not less than, or superior to DSA in their diagnosis. MRI may play important roles in the examination and the diagnosis of cerebral AVMs.
