High Signal on T1 Sequence of Magnetic Resonance Imaging Confirmed to Be Intraplaque Haemorrhage by Histology in Middle Cerebral Artery

2014 ◽  
Vol 9 (4) ◽  
pp. E19-E19 ◽  
Author(s):  
Xiang Yan Chen ◽  
Ka Sing Wong ◽  
Wynnie Wai Man Lam ◽  
Ho-Keung Ng
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Middle Cerebral Artery ◽  
Cerebral Artery ◽  
High Signal ◽  
Resonance Imaging ◽  
Intraplaque Haemorrhage

Proximal hyper-intense vessel sign on initial FLAIR MRI in hyper-acute middle cerebral artery ischemic stroke: a retrospective observational study

2020 ◽  
pp. 028418512094671 ◽  
Author(s):  
Dong Hyuk Shin ◽  
Sang Kuk Han ◽  
Jang Hee Lee ◽  
Pil Cho Choi ◽  
Sang O Park ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Middle Cerebral Artery ◽  
Cerebral Artery ◽  
Cerebral Arteries ◽  
Brain Mri ◽  
Large Vessel ◽  
Resonance Imaging ◽  
Vessel Occlusion ◽  
Vessel Stenosis

Background A hyper-intense vessel sign on fluid attenuated inversion recovery magnetic resonance imaging (FHV) represents slow blood flow in the cerebral arteries. Purpose To investigate the relationship between the proximal FHV (pFHV) on initial magnetic resonance imaging (MRI) and the status of the culprit vessel (stenosis, obstruction) in hyper-acute strokes affecting the territory of the middle cerebral artery (MCA). Material and Methods The study participants consisted of 105 patients presenting to the emergency department (ED) with acute MCA infarction within 4.5 h of onset of symptoms. Patients underwent brain MRI within 45 min of arrival at the ED and angiography within 2 h of arrival. Culprit vessel status and presence of a pFHV on initial MRI were investigated retrospectively. Results The pFHV was observed in 71/105 (67.6%) patients who presented with a hyper-acute MCA infarction. All patients with hyper-acute MCA infarction caused by internal carotid artery (90.6% caused by M1 occlusion, 92.9% caused by M2 occlusion) showed a pFHV on initial MRI. After logistic regression analysis, the presence of a pFHV showed significant positive correlation with large vessel occlusion (adjusted odds ratio [OR] 34.533, 95% confidence interval [CI] 9.781–121.926; P < 0.001). A pFHV was not associated with severe large vessel stenosis. Conclusion A pFHV is independently representative of the acute occlusion of intervention-eligible proximal arteries within the territory of the MCA. If a patient with a hyper-acute MCA infarction shows a pFHV, aggressive flow augmentation strategies and early activation of intervention team should be warranted for best patient outcome.

scholarly journals Sustained diffusion reversal with in-bore reperfusion in monkey stroke models: Confirmed by prospective magnetic resonance imaging

2016 ◽  
Vol 37 (6) ◽  
pp. 2002-2012 ◽  
Author(s):  
Kyung Sik Yi ◽  
Chi-Hoon Choi ◽  
Sang-Rae Lee ◽  
Hong Jun Lee ◽  
Youngjeon Lee ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Middle Cerebral Artery ◽  
Middle Cerebral Artery Occlusion ◽  
Cerebral Artery ◽  
Diffusion Weighted Imaging ◽  
Artery Occlusion ◽  
Resonance Imaging ◽  
Diffusion Weighted ◽  
Cerebral Artery Occlusion

Although early diffusion lesion reversal after recanalization treatment of acute ischaemic stroke has been observed in clinical settings, the reversibility of lesions observed by diffusion-weighted imaging remains controversial. Here, we present consistent observations of sustained diffusion lesion reversal after transient middle cerebral artery occlusion in a monkey stroke model. Seven rhesus macaques were subjected to endovascular transient middle cerebral artery occlusion with in-bore reperfusion confirmed by repeated prospective diffusion-weighted imaging. Early diffusion lesion reversal was defined as lesion reversal at 3 h after reperfusion. Sustained diffusion lesion reversal was defined as the difference between the ADC-derived pre-reperfusion maximal ischemic lesion volume (ADCD-P Match) and the lesion on 4-week follow-up FLAIR magnetic resonance imaging. Diffusion lesions were spatiotemporally assessed using a 3-D voxel-based quantitative technique. The ADCD-P Match was 9.7 ± 6.0% (mean ± SD) and the final infarct was 1.2–6.0% of the volume of the ipsilateral hemisphere. Early diffusion lesion reversal and sustained diffusion lesion reversal were observed in all seven animals, and the calculated percentages compared with their ADCD-P Match ranged from 8.3 to 51.9% (mean ± SD, 26.9 ± 15.3%) and 41.7–77.8% (mean ± SD, 65.4 ± 12.2%), respectively. Substantial sustained diffusion lesion reversal and early reversal were observed in all animals in this monkey model of transient focal cerebral ischaemia.

scholarly journals Vessel wall differences between middle cerebral artery and basilar artery plaques on magnetic resonance imaging

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Peng-Peng Niu ◽  
Yao Yu ◽  
Hong-Wei Zhou ◽  
Yang Liu ◽  
Yun Luo ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Middle Cerebral Artery ◽  
Cerebral Artery ◽  
Basilar Artery ◽  
Vessel Wall ◽  
Resonance Imaging
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