Hyperacute Middle Cerebral Artery Territory Infarction: Comparison of Unenhanced CT, Spin-Echo T2-weighted,Fast FLAIR, and Diffusion-weighted MR Imaging

1999 ◽  
Vol 41 (1) ◽  
pp. 1 ◽  
Author(s):  
Dae Seob Choi ◽  
Dong Gyu Na ◽  
Hong Sik Byun ◽  
Kwang Ho Lee ◽  
Chin Sang Chung ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Middle Cerebral Artery ◽  
Cerebral Artery ◽  
Spin Echo ◽  
Middle Cerebral Artery Territory ◽  
Unenhanced Ct ◽  
Diffusion Weighted ◽  
And Diffusion

Influence of Availability of Clinical History on Detection of Early Stroke Using Unenhanced CT and Diffusion-Weighted MR Imaging

2002 ◽  
Vol 179 (1) ◽  
pp. 223-228 ◽  
Author(s):  
Mark E. Mullins ◽  
Michael H. Lev ◽  
Dawid Schellingerhout ◽  
Walter J. Koroshetz ◽  
R. Gilberto Gonzalez
Keyword(s):  
Mr Imaging ◽  
Clinical History ◽  
Unenhanced Ct ◽  
Diffusion Weighted ◽  
And Diffusion ◽  
Early Stroke

Early Detection of Hyperacute Cerebral Infarction in Dogs: Comparison of Unenhanced CT, Diffusion-weighted,Spin-echo T2 - weighted, and Fast FLAIR MR Imaging

1999 ◽  
Vol 41 (1) ◽  
pp. 17
Author(s):  
Jung Hwan Yoon ◽  
Dong Gyu Na ◽  
Hong Sik Byun ◽  
Seung Kwon Kim ◽  
Sung Ki Cho ◽  
...  
Keyword(s):  
Early Detection ◽  
Mr Imaging ◽  
Cerebral Infarction ◽  
Spin Echo ◽  
Unenhanced Ct ◽  
Diffusion Weighted

scholarly journals The anesthetic approach for endovascular recanalization therapy depends on the lesion site in acute ischemic stroke

2021 ◽  
Author(s):  
Kilian Fröhlich ◽  
Gabriela Siedler ◽  
Svenja Stoll ◽  
Kosmas Macha ◽  
Thomas M. Kinfe ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Middle Cerebral Artery ◽  
Acute Ischemic Stroke ◽  
Cerebral Artery ◽  
Posterior Circulation ◽  
Neurological Deficits ◽  
Stroke Severity ◽  
Lesion Volume ◽  
Middle Cerebral Artery Territory ◽  
Cerebral Lesion

Abstract Purpose Endovascular therapy (EVT) of large-vessel occlusion in acute ischemic stroke (AIS) may be performed in general anesthesia (GA) or conscious sedation (CS). We intended to determine the contribution of ischemic cerebral lesion sites on the physician’s decision between GA and CS using voxel-based lesion symptom mapping (VLSM). Methods In a prospective local database, we sought patients with documented AIS and EVT. Age, stroke severity, lesion volume, vigilance, and aphasia scores were compared between EVT patients with GA and CS. The ischemic lesions were analyzed on CT or MRI scans and transformed into stereotaxic space. We determined the lesion overlap and assessed whether GA or CS is associated with specific cerebral lesion sites using the voxel-wise Liebermeister test. Results One hundred seventy-nine patients with AIS and EVT were included in the analysis. The VLSM analysis yielded associations between GA and ischemic lesions in the left hemispheric middle cerebral artery territory and posterior circulation areas. Stroke severity and lesion volume were significantly higher in the GA group. The prevalence of aphasia and aphasia severity was significantly higher and parameters of vigilance lower in the GA group. Conclusions The VLSM analysis showed associations between GA and ischemic lesions in the left hemispheric middle cerebral artery territory and posterior circulation areas including the thalamus that are known to cause neurologic deficits, such as aphasia or compromised vigilance, in AIS-patients with EVT. Our data suggest that higher disability, clinical impairment due to neurological deficits like aphasia, or reduced alertness of affected patients may influence the physician’s decision on using GA in EVT.

scholarly journals Combined T2 and diffusion-weighted MR imaging with template prostate biopsies in men suspected with prostate cancer but negative transrectal ultrasound-guided biopsies

2016 ◽  
Vol 35 (2) ◽  
pp. 213-220 ◽  
Author(s):  
Nissar Sheikh ◽  
Cheng Wei ◽  
Magdalena Szewczyk-Bieda ◽  
Annie Campbell ◽  
Shaukat Memon ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Mr Imaging ◽  
Transrectal Ultrasound ◽  
Ultrasound Guided ◽  
Prostate Biopsies ◽  
Diffusion Weighted ◽  
And Diffusion

Susceptibility-diffusion mismatch in middle cerebral artery territory acute ischemic stroke: clinical and imaging implications

2016 ◽  
Vol 58 (7) ◽  
pp. 876-882 ◽  
Author(s):  
Seyedmehid Payabvash ◽  
Shayandokht Taleb ◽  
John C Benson ◽  
Benjamin Hoffman ◽  
Mark C Oswood ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Middle Cerebral Artery ◽  
Acute Ischemic Stroke ◽  
Cerebral Artery ◽  
Middle Cerebral Artery Territory

scholarly journals Prediction of secondary ischemic lesions with diffusion-weighted imaging after transient middle cerebral artery occlusion in rats

Stroke ◽  
2001 ◽  
Vol 32 (suppl_1) ◽  
pp. 352-352
Author(s):  
Fuhai Li ◽  
Matthew D Silva ◽  
Xiangjun Meng ◽  
Christopher H Sotak ◽  
Marc Fisher
Keyword(s):  
Middle Cerebral Artery ◽  
Middle Cerebral Artery Occlusion ◽  
Cerebral Artery ◽  
Diffusion Weighted Imaging ◽  
Artery Occlusion ◽  
Lesion Volume ◽  
Diffusion Weighted ◽  
Adc Values ◽  
Cerebral Artery Occlusion ◽  
Initial Lesions

P75 Background and Purpose: Previous studies demonstrated that secondary ischemic lesions documented by diffusion-weighted imaging might be smaller than, larger than or similar to initial lesions that occur during ischemia. The purpose of this study was to investigate if the size of secondary lesions can be predicted. Methods: Twelve rats underwent 30 minutes of transient middle cerebral artery occlusion with the intraluminal suture method. Diffusion- and perfusion-weighted images were performed just before reperfusion, 90 minutes and 24 hours after reperfusion. The ischemic lesion size was calculated by tracing visual abnormalities on the apparent diffusion coefficient (ADC) maps. Cerebral blood flow index (CBF i ) ratio was calculated by dividing the ipsilateral CBF i by the contralateral CBF i . Based on difference between initial and secondary lesion volume, rats were assigned to reperfusion-benefit group (n=6) where secondary lesions were smaller than initial lesions (less than 85% of initial lesions) and reperfusion-nonbenefit group (n=6) where secondary lesions were similar to or larger than initial lesions (more than 85% of initial lesions). Results: At 90 minutes after reperfusion, the initial ischemic lesions almost disappeared in both groups. At 24 hours, secondary lesions were 54±11% (mean±SD) of the initial lesions in the reperfusion-benefit group and 100±14% of the initial lesions in the reperfusion-nonbenefit group (p<0.001). There was no difference in ADC values (47±2×10 -5 mm 2 /s vs 46±5×10 -5 mm 2 /s, p=0.7) and CBF i ratio (0.62±0.06 vs 0.67±0.04, p=0.2) between the two groups before reperfusion. However, the initial lesion volume was significantly smaller in the reperfusion-benefit group than in the reperfusion-nonbenefit group (125±54 mm 3 vs 195±36 mm 3 , p=0.037). Conclusions: Changes of ADC values and CBF before reperfusion are unable to predict if initial ischemic lesions will eventually shrink or not after reperfusion. Smaller size of initial lesions may suggest that secondary lesions will be smaller than initial lesions.

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