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Condition: Stroke
Procedure: MRI Scan

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Total 6681 results found since Jan 2013.

Fragmentation of Care and the Use of Head Computed Tomography in Patients With Ischemic Stroke Original Articles
Conclusions— Rates of high-intensity CT use for patients with ischemic stroke reflect wide practice patterns across regions and races. Medicare expenditures parallel these disparities. Fragmentation of care is associated with high-intensity CT use.
Source: Circulation: Cardiovascular Quality and Outcomes - May 20, 2014 Category: Cardiology Authors: Bekelis, K., Roberts, D. W., Zhou, W., Skinner, J. S. Tags: Acute Cerebral Infarction, Computerized tomography and Magnetic Resonance Imaging, Pathology of Stroke Original Articles Source Type: research

Ischemic Stroke in Evolution: Predictive Value of Perfusion Computed Tomography
Background: Various perfusion computed tomography (PCT) parameters have been used to identify tissue at risk of infarction in the setting of acute stroke. The purpose of this study was to examine predictive value of the PCT parameters commonly used in clinical practice to define ischemic penumbra. The patient selection criterion aimed to exclude the effect of thrombolysis from the imaging data.Methods: Consecutive acute stroke patients were screened and a total of 18 patients who initially underwent PCT and CT angiogram (CTA) on presentation but did not qualify to receive thrombolytic therapy were selected. The PCT images ...
Source: Journal of Stroke and Cerebrovascular Diseases - August 19, 2013 Category: Neurology Authors: Amir Kheradmand, Marc Fisher, David Paydarfar Tags: Original Articles Source Type: research

Comparison of Computed Tomographic and Magnetic Resonance Perfusion Measurements in Acute Ischemic Stroke: Back-to-Back Quantitative Analysis Clinical Sciences
Conclusions— MRP and CTP can be used interchangeably if one uses Tmax measurement.
Source: Stroke - May 27, 2014 Category: Neurology Authors: Lin, L., Bivard, A., Levi, C. R., Parsons, M. W. Tags: Computerized tomography and Magnetic Resonance Imaging Clinical Sciences Source Type: research

Advantages of susceptibility‐weighted magnetic resonance sequences in the visualization of intravascular thrombi in acute ischemic stroke
ConclusionsSWAN was more sensitive than T2* in the visualization of SVS in the intracranial arteries during the acute phase of ischemic stroke. Our study shows that the low number of SVS visualized using T2* in previous studies is probably related to a lack of sensitivity of the sequence, rather than to the nature or age of the thrombus. The greater sensitivity of SWAN seems to be linked to the visualization of SVS in cases of small thrombi.
Source: International Journal of Stroke - October 1, 2014 Category: Neurology Authors: R. Allibert, C. Billon Grand, F. Vuillier, F. Cattin, E. Muzard, A. Biondi, T. Moulin, E. Medeiros Tags: Short Report Source Type: research

Systemic Inflammation Impairs Tissue Reperfusion Through Endothelin-Dependent Mechanisms in Cerebral Ischemia Basic Sciences
Conclusions— These data suggest patients with a raised inflammatory profile may have persistent deficits in perfusion after reopening of an occluded vessel. Future therapeutic strategies to interrupt the mechanism identified could lead to enhanced recovery of penumbra in patients with a heightened inflammatory burden and a better outcome after stroke.
Source: Stroke - October 27, 2014 Category: Neurology Authors: Murray, K. N., Girard, S., Holmes, W. M., Parkes, L. M., Williams, S. R., Parry-Jones, A. R., Allan, S. M. Tags: Computerized tomography and Magnetic Resonance Imaging, Pathology of Stroke, Risk Factors for Stroke, Neuroprotectors Basic Sciences Source Type: research

Imaging of occlusive thrombi in acute ischemic stroke
Thrombi, or clots, often occlude proximal segments of the cerebral arterial circulation in acute ischemic stroke. Thromboembolic occlusion or thrombi superimposed on atherosclerotic plaque are the principal focus of acute stroke therapies such as thrombolysis or thrombectomy. We review the imaging characteristics of thrombi on multimodal computed tomography and magnetic resonance imaging, angiography, and ultrasonography, summarizing recent studies that facilitate therapeutic decision‐making from these noninvasive studies. Information about the location, size, and imaging characteristics can be ascertained using these te...
Source: International Journal of Stroke - December 26, 2014 Category: Neurology Authors: Gregory G. Gasparian, Nerses Sanossian, Mark S. Shiroishi, David S. Liebeskind Tags: Review Source Type: research

White Matter Ischemic Changes in Hyperacute Ischemic Stroke: Voxel-Based Analysis Using Diffusion Tensor Imaging and MR Perfusion Clinical Sciences
Conclusions— Diffusion tensor imaging-FA was decreased in regions of WM infarction and increased in hypoperfused WM in patients with hyperacute acute ischemic stroke. The significantly increased FA values in the hypoperfused WM with Tmax≥5.4 s are suggestive of early ischemic microstructural changes.
Source: Stroke - January 26, 2015 Category: Neurology Authors: Nael, K., Trouard, T. P., Lafleur, S. R., Krupinski, E. A., Salamon, N., Kidwell, C. S. Tags: CT and MRI, Acute Cerebral Infarction, Computerized tomography and Magnetic Resonance Imaging Clinical Sciences Source Type: research

Bright Vessel Appearance on Arterial Spin Labeling MRI for Localizing Arterial Occlusion in Acute Ischemic Stroke Brief Reports
Conclusions— The bright vessel appearance on ASL imaging can provide an important diagnostic clue for the detection and localization of arterial occlusion sites in patients with acute ischemic stroke.
Source: Stroke - January 26, 2015 Category: Neurology Authors: Yoo, R.-E., Yun, T. J., Rhim, J. H., Yoon, B.-W., Kang, K. M., Choi, S. H., Kim, J.-H., Kim, J. E., Kang, H.-S., Sohn, C.-H., Han, M. H. Tags: CT and MRI, Acute Cerebral Infarction, Brain Circulation and Metabolism, Computerized tomography and Magnetic Resonance Imaging Brief Reports Source Type: research

Impact of Alcohol Consumption on the Outcome of Ischemic Stroke and Thrombolysis: Role of the Hepatic Clearance of Tissue-Type Plasminogen Activator Basic Sciences
Conclusions— An efficient liver-driven clearance of tPA might influence the safety of thrombolysis after stroke.
Source: Stroke - May 22, 2015 Category: Neurology Authors: Lemarchand, E., Gauberti, M., Martinez de Lizarrondo, S., Villain, H., Repesse, Y., Montagne, A., Vivien, D., Ali, C., Rubio, M. Tags: Acute Cerebral Infarction, Thrombolysis Basic Sciences Source Type: research

Human Urinary Kallidinogenase Improves Outcome of Stroke Patients by Shortening Mean Transit Time of Perfusion Magnetic Resonance Imaging
Improving cerebral perfusion remains a good option for ischemic stroke for restoring cerebral blood flow. Human urinary kallidinogenase has been shown promising in treating stroke patients. To investigate whether human urinary kallidinogenase's efficacy in treating stroke patients has relationship with improving cerebral perfusion and possible mechanism.
Source: Journal of Stroke and Cerebrovascular Diseases - June 29, 2015 Category: Neurology Authors: Jingwei Li, Yan Chen, Xin Zhang, Bing Zhang, Meijuan Zhang, Yun Xu Source Type: research

Brain Magnetic Resonance with Negative Diffusion-Weighted Imaging: Does It Preclude Acute Stroke Diagnosis?
Brain magnetic resonance imaging (MRI) with diffusion-weighted imaging (DWI) sequences and correlative apparent diffusion coefficient (ADC) maps is a very sensitive way to detect acute ischemic stroke. Cases of negative MRI–DWI on acute phase of ischemic stroke are uncommon, and most of them are reported in single small-sized lesions, which in most cases are below the technical spatial resolution and in patients imaged shortly after the symptoms start. The few published cases of territorial ischemic stroke with negative DWI affect exclusively one vascular territory.
Source: Journal of Stroke and Cerebrovascular Diseases - July 10, 2015 Category: Neurology Authors: Catarina Aragão Homem, Ana Catarina Fonseca, Ruth Geraldes, Teresa Pinho e Melo Tags: Case Report Source Type: research

Dynamic Evolution of Diffusion-Weighted Imaging Lesions in Patients With Minor Ischemic Stroke Brief Reports
Conclusions— The most common pattern of infarct evolution in patients with minor stroke is a reduction in volume, but complete resolution is uncommon.
Source: Stroke - July 27, 2015 Category: Neurology Authors: Kate, M. P., Riaz, P., Gioia, L., Sivakumar, L., Jeerakathil, T., Buck, B., Beaulieu, C., Butcher, K. Tags: Acute Cerebral Infarction, Computerized tomography and Magnetic Resonance Imaging Brief Reports Source Type: research

Computed Tomography Perfusion in Acute Ischemic Stroke: Is It Ready for Prime Time? Controversies in Stroke
Source: Stroke - July 27, 2015 Category: Neurology Authors: Liebeskind, D. S., Parsons, M. W., Wintermark, M., Selim, M., Molina, C. A., Lev, M. H., Gonzalez, R. G. Tags: Pathophysiology, Brain Circulation and Metabolism, Computerized tomography and Magnetic Resonance Imaging, Other Stroke Treatment - Surgical Controversies in Stroke Source Type: research

Effects of Low-Frequency Repetitive Transcranial Magnetic Stimulation Combined with Intensive Speech Therapy on Cerebral Blood Flow in Post-Stroke Aphasia
Abstract We provided an intervention to chronic post-stroke aphasic patients using low-frequency repetitive transcranial magnetic stimulation (LF-rTMS) guided by a functional magnetic resonance imaging (fMRI) evaluation of language laterality, combined with intensive speech therapy (ST). We performed a single photon emission-computed tomography (SPECT) scan pre- and post-intervention and investigated the relationship between cerebral blood flow (CBF) and language function. Fifty right-handed chronic post-stroke aphasic patients were enrolled in the study. During their 11-day hospital admission, the patients receiv...
Source: Translational Stroke Research - August 7, 2015 Category: Neurology Source Type: research

Drugs to Enhance Motor Recovery After Stroke Topical Reviews
Source: Stroke - September 28, 2015 Category: Neurology Authors: Cramer, S. C. Tags: Exercise/exercise testing/rehabilitation, Other Treatment, Behavioral Changes and Stroke, Computerized tomography and Magnetic Resonance Imaging, Rehabilitation, Stroke, Other Stroke Treatment - Medical Topical Reviews Source Type: research