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KMID : 0359719920100020197
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Journal of the Korean Neurological Association
1992 Volume.10 No. 2 p.197 ~ p.208
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MR Angiography in the Head and Neck
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Abstract
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Contrast angiography is a reliable method for obtaining morphologic and hemodynamic informations about the blood vessels. The morbidity assoicated with angiographic procedures incluedes the possibility of stroke, renal failure, and discomforts
from
catheter insertion and contrast media injection.
A noninvasive alternative angiographic method would be clearly desirable. This article discusses 70 examples of our initial experience with MR angiography (time-of-flight and phase contrast methods). The correlation between MR angiography and
contrast
angiography was relatively good. Conventional MR neuroangiography was better for the evaluation of collateral cireulation than MR angiography. On MR angiography, the over estimation of luminal narrowing resulted from complex flow that occurred
normally
in carotid bifurcation as well as distal to stenosis. Contrast material was used for better monitering of the spins of the capillary circulation Feeding arteries and draining veins of vascular malformations were well delineated only in a large
one,
but
not delineated in a small AVM and in a venous angioma. Only six cases of aneurysm were experienced in this study and a aneurysm as small as 4 mm could be shown, The obstructed vessels were well demonstrated on MR angiography. 2-D time-of-flight
MR
angiography of transverse sinus thrombosis could could confirm the clinical impression by the showing of little flow in the transverse sinus.
MR angiography of the head and neck offers gret promise as a noninvasive and useful means of studying vascular abnormalities and as an alternative means fo difficult cases for contrast angiography.
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KEYWORD
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