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MR Digital Subtraction Angiography of Cerebral Arteriovenous Malformations

Kazuhiro Tsuchiyaa, Shichiro Katasea, Ayako Yoshinoa and Junichi Hachiyaa

a From the Department of Radiology, Kyorin University School of Medicine, 6–20–2, Shinkawa, Mitaka, Tokyo 181-8611, Japan. Address reprint requests to Kazuhiro Tsuchiya, MD.



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  		FIG 1. 48-year-old woman with left frontal AVM.

A and B, Conventional angiograms show an AVM fed by branches of the anterior cerebral artery. It drains into the superior sagittal sinus via several draining veins.

C–G, Original images of MR DSA (5/2.3/1) in the sagittal plane. C is a mask image. Scans for D, E, F, and G were initiated 1.22 seconds, 2.44 seconds, 4.27 seconds, and 7.93 seconds after C, respectively. Scanning time for each image was 0.61 seconds.(cont'd) ->



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  		<- (cont'd) H–K, Gray-scale–reversed MR DSA images of H, I, J, and K correspond to source images of D, E, F, and G, respectively. Demonstration of each component of the AVM was graded as excellent (feeder = 3, nidus = 3, drainer = 3). Note the carotid siphon remains visible when major veins and dural sinuses are shown (K)



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  		FIG 2. 24-year-old woman with cerebellar vermian AVM.

A, Conventional angiogram shows a nidus of an AVM fed by the superior cerebellar artery draining to the vein of Galen.

B and C, MR DSA images (5/2.3/1) in the sagittal plane clearly show each component of the AVM (feeder = 3, nidus = 3, drainer = 3).



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  		FIG 3. 66-year-old woman with right parietal AVM.

A and B, Conventional angiograms show an AVM fed by the angular artery draining into the superior sagittal sinus via an enlarged cortical vein.

C–E, MR DSA images (5/2.3/1) in the sagittal plane clearly show the nidus and drainer. Part of the feeder just proximal to the nidus is not visible because it is outside the scanned section (feeder = 2, nidus = 3, drainer = 3).





Copyright © 2008 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X