Correlation between Hyperintense Vessels on FLAIR Imaging and Arterial Circulation Time on Cerebral Angiography

• DOI: 10.2463/mrms.2015-0006
• Publication Date: 2015-09-03T22:06:40Z
• Authors: Seung Ha LEE; Kwon Duk SEO; Ji Hwa KIM; Sang Hyun SUH; Sung Jun AHN; Kyung-Yul LEE
• Keywords: Fluid-attenuated inversion recovery; Collateral circulation; Magnetic resonance angiography

Hyperintense vessels (HVs) on fluid-attenuated inversion recovery (FLAIR) imaging are associated with the leptomeningeal collateral circulation in cases of arterial occlusive lesions. Nevertheless, relationship between HVs FLAIR and time (ACT) cerebral angiography has not been defined.We analyzed images 11 patients acute occlusion distal internal carotid artery or proximal middle calculated difference ACT (DACT) infarcted normal hemispheres. was defined as interval from initial opacification ipsilateral contralateral cavernous to late phase territories. We scored using a modified Alberta Stroke Program Early Computerized Tomography Score (ASPECTS) determined by grading flow.We detected 10 (median score, 4; range, 0 6). Comparison hemispheres demonstrated absent subtle when DACT too short (<one second) long (>7.98 s) prominent moderate (2 5 s). The score estimated well quadratic regression model (R(2) = 0.602) better than flow 0.256).In large occlusion, hyperintensity may be dependent via retrograde filling circulation.