Kim Sun Mi, Ryu Chang-Woo, Jahng Geon-Ho, Kim Eui Jong, Choi Woo Suk
Department of Radiology, Gangdong Kyung Hee University Hospital, School of Medicine, Kyung Hee University, Seoul, South Korea.
J Neuroimaging. 2014 Sep-Oct;24(5):460-6. doi: 10.1111/jon.12009. Epub 2013 Jan 16.
Characterizing the morphologies of occluded artery segments may help elucidate the etiology of chronic intracranial artery occlusion. We acquired high-resolution MRI (HR-MRI) of the middle cerebral artery (MCA) in patients with chronic unilateral MCA occlusion and evaluated the MRI and clinical findings.
We selected 20 consecutive patients who presented with unilateral MCA occlusion. Proton-density weighted HR-MRI of the occluded MCA was acquired using a 3.0 Tesla MRI. We surveyed the morphology of the MCA at the occluded segment. Symptoms, the presence of other stenotic arteries, and atherosclerosis risk factors were compared for patients grouped by different findings on HR-MRI.
MCA occlusions were classified into the following two groups: plugged MCA (13/20) with a clear view of the MCA trunk or vanishing MCA (7/20) with no MCA trunk visible in the Sylvian cistern. The presence of other stenotic arteries was more frequent in the plugged MCA group than in the vanishing MCA group.
HR-MRI can characterize the morphology of pathologic segments of chronic unilateral MCA occlusions in vivo. In chronic MCA occlusion, morphological analysis using HR-MRI may enhance the effort to assess the etiology in company with the angiographic finding.
描述闭塞动脉段的形态可能有助于阐明慢性颅内动脉闭塞的病因。我们获取了慢性单侧大脑中动脉（MCA）闭塞患者的大脑中动脉高分辨率磁共振成像（HR-MRI），并评估了MRI和临床结果。
我们选择了20例连续的单侧MCA闭塞患者。使用3.0特斯拉MRI获取闭塞MCA的质子密度加权HR-MRI。我们观察了闭塞段MCA的形态。对根据HR-MRI不同结果分组的患者比较了症状、其他狭窄动脉的存在情况和动脉粥样硬化危险因素。
MCA闭塞分为以下两组：主干清晰可见的闭塞性MCA（13/20）或在侧裂池内不可见MCA主干的消失性MCA（7/20）。闭塞性MCA组中其他狭窄动脉的存在比消失性MCA组更常见。
HR-MRI可以在体内描述慢性单侧MCA闭塞病理段的形态。在慢性MCA闭塞中，使用HR-MRI进行形态学分析可能会增强结合血管造影结果评估病因的工作。
