Applications of diffusion-perfusion magnetic resonance imaging in acute ischemic stroke

Neurology ◽  
1999 ◽  
Vol 52 (9) ◽  
pp. 1750-1750 ◽  
Author(s):  
M. Fisher ◽  
G. W. Albers
Keyword(s):  
Magnetic Resonance Imaging ◽  
Ischemic Stroke ◽  
Magnetic Resonance ◽  
Acute Ischemic Stroke ◽  
Perfusion Magnetic Resonance Imaging ◽  
Resonance Imaging

Perfusion magnetic resonance imaging of acute ischemic stroke

2002 ◽  
Vol 37 (3) ◽  
pp. 230-236 ◽  
Author(s):  
Pamela W. Schaefer ◽  
Javier M. Romero ◽  
P. Ellen Grant ◽  
Ona Wu ◽  
A. Gregory Sorensen ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Ischemic Stroke ◽  
Magnetic Resonance ◽  
Acute Ischemic Stroke ◽  
Perfusion Magnetic Resonance Imaging ◽  
Resonance Imaging

scholarly journals Diagnosis of Acute Ischemic Stroke Based on Time-To-Peak and Diffusion-Weighted Magnetic Resonance Imaging.

2002 ◽  
Vol 42 (7) ◽  
pp. 281-288
Author(s):  
Keisuke MARUYAMA ◽  
Tsuneyoshi EGUCHI ◽  
Shigeo SORA ◽  
Masafumi IZUMI ◽  
Hirofumi HIYAMA ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Ischemic Stroke ◽  
Magnetic Resonance ◽  
Acute Ischemic Stroke ◽  
Resonance Imaging ◽  
Time To Peak ◽  
Diffusion Weighted ◽  
Weighted Magnetic Resonance Imaging ◽  
And Diffusion

scholarly journals Feasibility and Diagnostic Value of Cardiovascular Magnetic Resonance Imaging After Acute Ischemic Stroke of Undetermined Origin

Stroke ◽  
2017 ◽  
Vol 48 (5) ◽  
pp. 1241-1247 ◽  
Author(s):  
Karl Georg Haeusler ◽  
Christian Wollboldt ◽  
Laura zu Bentheim ◽  
Juliane Herm ◽  
Sebastian Jäger ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cardiovascular Magnetic Resonance ◽  
Ischemic Stroke ◽  
Magnetic Resonance ◽  
Acute Ischemic Stroke ◽  
Cardiovascular Magnetic Resonance Imaging ◽  
Diagnostic Value ◽  
Resonance Imaging

Abstract TP400: The Differences of Vessel Wall Features Between the Anterior and Posterior Brain Arteries Detected by High Resolution Magnetic Resonance Imaging in Patients With Acute Ischemic Stroke

Stroke ◽  
2020 ◽  
Vol 51 (Suppl_1) ◽  
Author(s):  
Xiangyan Chen ◽  
Lu Zheng ◽  
Jia LI ◽  
Wenjie Yang
Keyword(s):  
Magnetic Resonance Imaging ◽  
Ischemic Stroke ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Acute Ischemic Stroke ◽  
Vessel Wall ◽  
Posterior Circulation ◽  
Intraplaque Hemorrhage ◽  
Resonance Imaging ◽  
Anterior Circulation

Backgrounds: The purpose of this study was to investigate vessel wall features visualization by high resolution magnetic resonance imaging (HRMRI) in a series of ischemic stroke patients and to identify differences between lesions in the anterior and posterior circulation. Methods: We consecutively recruited Chinese patients with acute ischemic stroke or transient ischemic attack from 2016 to 2018. All patients were scanned at 3T magnetic resonance imaging. We evaluated pre-and post-contrast cross-sectional views of M1 and M2 segments of middle cerebral arteries (MCAs), basilar arteries (BA) and V4 segments of vertebral arteries (VAs). Results: A total of 74 patients (males 52.3%; median age 62 years old) were included in this study, among which, 234 lesions were identified on HRMRI, including 117 MCA lesions, 26 BA lesions, and 91 VA lesions. The sensitivity and specificity of MRA for diagnosing stenosis in anterior circulation were 89.3% (95% CI, 81.8%- 94.2%) and 50.0 (95% CI, 9.2%- 90.8%). The sensitivity and specificity of MRA for diagnosing stenosis in posterior circulation were 73.2% (95% CI, 63.9%- 80.9%) and 40.0 (95% CI, 7.3%- 83.0%). VA had a significantly higher contrast enhancement index (43.71± 7.74, p <0.016) than MCA (23.32± 2.46) or BA (22.69± 5.31) . Anterior circulation plaques had higher degree of stenosis (anterior versus posterior: 68.5% vs. 62.9%, p =0.036), more eccentric distribution (anterior versus posterior: 70.1% versus 53.8%, p =0.015) and higher rate of intraplaque hemorrhage (anterior versus posterior: 17.1% versus 7.7%, p =0.046). The plaques in posterior circulation had a thicker lesion wall (posterior versus anterior 16.58± 8.25 mm 2 vs. 9.10± 4.07 mm 2 , p <0.001) and higher enhancement index (posterior versus anterior 39.04± 8.50 vs. 23.32± 2.46, p <0.001) than the plaques in anterior circulation. Conclusions: The lesions in posterior circulations could be obscure on MRA. The area stenosis, intraplaque hemorrhage and enhancement index differed between circulations.

scholarly journals Thrombolysis Outcomes in Acute Ischemic Stroke by Fluid-Attenuated Inversion Recovery Hyperintense Arteries

Stroke ◽  
2020 ◽  
Vol 51 (7) ◽  
pp. 2240-2243
Author(s):  
Zien Zhou ◽  
Sohei Yoshimura ◽  
Candice Delcourt ◽  
Richard I. Lindley ◽  
Shoujiang You ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Ischemic Stroke ◽  
Magnetic Resonance ◽  
Acute Ischemic Stroke ◽  
Infarct Volume ◽  
Inversion Recovery ◽  
Modified Rankin Scale ◽  
Resonance Imaging ◽  
Scale Scores ◽  
Fluid Attenuated Inversion Recovery

Background and Purpose: To determine factors associated with fluid-attenuated inversion recovery (FLAIR) hyperintense arteries (FLAIR-HAs) on magnetic resonance imaging and their prognostic significance in thrombolysis-treated patients with acute ischemic stroke from the ENCHANTED (Enhanced Control of Hypertension and Thrombolysis Stroke Study) trial alteplase-dose arm. Methods: Patients with acute ischemic stroke (N=293) with brain magnetic resonance imaging (FLAIR and diffusion-weighted imaging sequences) scanned <4.5 hours of symptom onset were assessed for location and extent (score) of FLAIR-HAs, infarct volume, large vessel occlusion (LVO), and other ischemic signs. Logistic regression models were used to determine predictors of FLAIR-HAs and the association of FLAIR-HAs with 90-day outcomes: favorable functional outcome (primary; modified Rankin Scale scores, 0–1), other modified Rankin Scale scores, and intracerebral hemorrhage. Results: Prior atrial fibrillation, LVO, large infarct volume, and anterior circulation infarction were independently associated with FLAIR-HAs. The rate of modified Rankin Scale scores 0 to 1 was numerically lower in patients with FLAIR-HAs versus without (69/152 [45.4%] versus 75/131 [57.3%]), as was the subset of LVO (37/93 [39.8%] versus 9/16 [56.3%]), but not in those without LVO (25/36 [69.4%] versus 60/106 [56.6%]). After adjustment for covariables, FLAIR-HAs were independently associated with increased primary outcome (adjusted odds ratio [95% CI]: overall 4.14 [1.63–10.50]; with LVO 4.92 [0.87–27.86]; no LVO 6.16 [1.57–24.14]) despite an increased risk of hemorrhagic infarct (4.77 [1.12–20.26]). Conclusions: FLAIR-HAs are more frequent in acute ischemic stroke with cardioembolic features and indicate potential for a favorable prognosis in thrombolysis-treated patients possibly mediated by LVO. Registration: URL: https://www.clinicaltrials.gov . Unique identifier: NCT01422616.

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