PWI-MRI and contrast extravasation in brain AVM help to estimate angiogenic activity.

Abstract:

INTRODUCTION:The aim of this study is to investigate perfusion characteristics of brain arteriovenous malformation (AVM) by means of MRI perfusion-weighted imaging (PWI). METHODS:Forty-three patients with brain AVM were prospectively included and investigated by PWI-MRI. Diagnosis of type of disease was made by angiogram. According to angiographic features, the study group was classified in three groups: two groups of patients with classical AVM (group 1 with few or no angiogenic feature (13 patients) and group 2 with many angiogenic features (18 patients)) and one group (group 3) which included patients with cerebral proliferative angiopathy (CPA; 12 patients). Twenty-one patients had never been treated endovascularly for their AVM and 22 patients received partial treatment by endovascular embolisation. Through PWI, corrected cerebral blood volume (CBVc), mean transit time (MTT), and percentage of microvascular leakage (MVL) as an indirect measure of permeability were assessed. RESULTS:The three patient groups did not differ significantly in baseline and clinical parameters. CBVc, MTT, and MVL differed significantly between the three groups (p = 0.003, p = 0.04, p = 0.01, respectively), with the lowest mean values found in group 1 and the highest in group 3. Mean MVL was 11.4 in group 1, 18.6 in group 2, and 21.9 in group 3. CONCLUSION:MRI can demonstrate differences in PWI parameters among patients with classical AVM and CPA, which are related to angiographic features of these AVMs. Through PWI, the level of angiogenic activity in AVMs may be monitored.

journal_name

Neuroradiology

journal_title

Neuroradiology

authors

Saliou G,Krings T,Rutgers DR,Toulgoat F,Ozanne A,Lasjaunias P,Ducreux D

doi

10.1007/s00234-011-0882-y

subject

Has Abstract

pub_date

2011-10-01 00:00:00

pages

793-800

issue

10

eissn

0028-3940

issn

1432-1920

journal_volume

53

pub_type

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