Evaluation of Enodvascular Treatment for Intracranial AVMs Using MRI.
10.3348/jkrs.1994.31.3.385
- Author:
Jung Ho SUH
;
Sun Yong KIM
;
Jae Ho CHO
;
Byung Ryun CHOI
- Publication Type:Original Article
- MeSH:
Arteries;
Artifacts;
Brain;
Ethiodized Oil;
Hemodynamics;
Humans;
Intracranial Arteriovenous Malformations;
Magnetic Resonance Imaging*;
Polyvinyl Alcohol;
Radiosurgery;
Tantalum
- From:Journal of the Korean Radiological Society
1994;31(3):385-390
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To evaluate the MR findings of embolized cerebral arteriovenous malformations according to various embolic materials. MATERIALS AND METHODS: We performed the endovascular embolization using four different kinds of embolic materials in 33 patients. Embolization related changes in the nidus and surrounding brain parenchyme were analyzed and the results were compared with pre- and postembolization MRI, CT and anglographic findings in all patients. RESULTS: Embolized vessels with N-buthyl-2-cyanoacrylate(NBCA) mixture showed some artifact in CT due to metallic character of tantalum powder or fatty nature of lipiodol. But in MRI, it was represented by fatty signals without artifact. In cases of using polyvinyl alcohol and ethylene vinyl alcohol copolymer(EVAL), there were no specific signal by the embolic material except for the disappearance of flow related signals in feeding arteries and shrinkage of venous ectasis. CONCLUSION: MRI is a valuable imaging modality for analysing the morphology and hemodynamics of cerebral AVMs, especially after embolization of pathologic vessels. Recognition of the signal of embolic agents and thus the thrombosed portion could lead to more precise analysis before surgery or radiosurgery.
