Filtered By:
Specialty: Radiology
Procedure: MRI Scan
This page shows you your search results in order of relevance.
Order by Relevance | Date
Total 555 results found since Jan 2013.
Structurofunctional resting-state networks correlate with motor function in chronic stroke
Conclusion The results demonstrate that changes after a stroke in both intrinsic and network-based structurofunctional correlations at rest are correlated with motor function, underscoring the importance of residual structural connectivity in cortical networks.
Source: NeuroImage: Clinical - July 29, 2017 Category: Radiology Source Type: research
Comparing a diffusion tensor and non-tensor approach to white matter fiber tractography in chronic stroke
Publication date: Available online 14 March 2015 Source:NeuroImage: Clinical Author(s): A.M. Auriat , M.R. Borich , N.J. Snow , K.P. Wadden , L.A. Boyd Diffusion tensor imaging (DTI)-based tractography has been used to demonstrate functionally relevant differences in white matter pathway status after stroke. However, it is now known that the tensor model is insensitive to the complex fiber architectures found in the vast majority of voxels in the human brain. The inability to resolve intra-voxel fiber orientations may have important implications for the utility of standard DTI-based tract reconstruction methods. Intra-vo...
Source: NeuroImage: Clinical - March 14, 2015 Category: Radiology Source Type: research
Definitive Diagnostic Evaluation of the Child With Arterial Ischemic Stroke and Approaches to Secondary Stroke Prevention
In children with arterial ischemic stroke (AIS), the definitive diagnosis of stroke subtype and confirmation of stroke etiology is necessary to mitigate stroke morbidity and prevent recurrent stroke. The common causes of AIS in children are sharply differentiated from the common causes of adult AIS. A comprehensive, structured diagnostic approach will identify the etiology of stroke in most children. Adequate diagnostic evaluation relies on advanced brain imaging and vascular imaging studies. A variety of medical and surgical secondary stroke prevention strategies directed at the underlying cause of stroke are available. T...
Source: Topics in Magnetic Resonance Imaging - October 1, 2021 Category: Radiology Tags: Review Articles Source Type: research
Thalamic diaschisis following perinatal stroke is associated with clinical disability
ConclusionBilateral thalamic volume changes occur after perinatal stroke. Ipsilesional volume loss is not associated with clinical motor function. Contralesional volume is inversely correlated with clinical motor function, suggesting the thalamus is involved in the known developmental plasticity that occurs in the contralesional hemisphere after early unilateral injury.
Source: NeuroImage: Clinical - January 5, 2019 Category: Radiology Source Type: research
Changes in hemodynamic responses in chronic stroke survivors do not affect fMRI signal detection in a block experimental design
Abstract: The use of canonical functions to model BOLD-fMRI data in people post-stroke may lead to inaccurate descriptions of task-related brain activity. The purpose of this study was to determine whether the spatiotemporal profile of hemodynamic responses (HDRs) obtained from stroke survivors during an event-related experiment could be used to develop individualized HDR functions that would enhance BOLD-fMRI signal detection in block experiments. Our long term goal was to use this information to develop individualized HDR functions for stroke survivors that could be used to analyze brain activity associated with locomoto...
Source: Magnetic Resonance Imaging - May 3, 2013 Category: Radiology Authors: Nutta-on Promjunyakul, Brian D. Schmit, Sheila Schindler-Ivens Tags: Original Contributions Source Type: research
The Association between Diffusion MRI ‐Defined Infarct Volume and NIHSS Score in Patients with Minor Acute Stroke
CONCLUSIONIn patients with minor stroke, the nature of deficit when used with the NIHSS score can improve prediction of infarct volume. This may have clinical and therapeutic implications.
Source: Journal of Neuroimaging - October 31, 2016 Category: Radiology Authors: Shadi Yaghi, Charlotte Herber, Amelia K. Boehme, Howard Andrews, Joshua Z. Willey, Sara K. Rostanski, Matthew Siket, Mahesh V. Jayaraman, Ryan A. McTaggart, Karen L. Furie, Randolph S. Marshall, Ronald M. Lazar, Bernadette Boden ‐Albala Tags: Clinical Investigative Study Source Type: research
Magnetic resonance imaging of arterial stroke mimics: a pictorial review
AbstractAcute ischaemic stroke represents the most common cause of new sudden neurological deficit, but other diseases mimicking stroke happen in about one-third of the cases. Magnetic resonance imaging (MRI) is the best technique to identify those ‘stroke mimics’. In this article, we propose a diagnostic approach of those stroke mimics on MRI according to an algorithm based on diffusion-weighted imaging (DWI), which can be abnormal or normal, followed by the results of other common additional MRI sequences, such as T2 with gradient recall ed echo weighted imaging (T2-GRE) and fluid-attenuated inversion recovery (FLAIR...
Source: Insights into Imaging - June 22, 2018 Category: Radiology Source Type: research
Reduced striatal activation in response to rewarding motor performance feedback after stroke
ConclusionStriatal hypoactivation in stroke survivors may cause impaired consolidation of motor skills. Stronger rewarding stimuli or drug-mediated enhancement may be needed to normalize reward processing after stroke with positive effects on recovery.
Source: NeuroImage: Clinical - October 24, 2019 Category: Radiology Source Type: research
Alterations of static and dynamic functional network connectivity in acute ischemic brainstem stroke
CONCLUSION: This study suggests that static and dynamic FNC impairment and aberrant connections exist in acute brainstem ischemic stroke, which expands what is known regarding the relationship between stroke and FNC from static and dynamic perspectives.PMID:36113019 | DOI:10.1177/02841851221127271
Source: Acta Radiologica - September 16, 2022 Category: Radiology Authors: Jian Zhang Yi Chang Source Type: research
Magnetic resonance imaging protocols in pediatric stroke
AbstractNeuroimaging protocols play an important role in the timely evaluation and treatment of pediatric stroke and its mimics. MRI protocols for stroke in the pediatric population should be guided by the clinical scenario and neurologic examination, with consideration of age, suspected infarct type and underlying risk factors. Acute stroke diagnosis and causes in pediatric age groups can differ significantly from those in adult populations, and delay in stroke diagnosis among children is a common problem. An awareness of pediatric stroke presentations and risk factors among pediatric emergency physicians, neurologists, p...
Source: Pediatric Radiology - January 6, 2023 Category: Radiology Source Type: research
False-Negative Diffusion-Weighted Imaging in Acute Stroke and its Frequency in Anterior and Posterior Circulation Ischemia
ConclusionsFalse-negative DWI findings in acute stroke can be observed both in association with the posterior circulation/small lesions and the anterior circulation/large lesions.
Source: Journal of Computer Assisted Tomography - September 1, 2014 Category: Radiology Tags: Neuroradiology Source Type: research
Can MRI quantification help evaluate stroke age?
Conclusions The quantification of MRI signal may be a helpful tool for stroke dating but cannot outperform the visual estimation of stroke lesion age.
Source: Journal of Neuroradiology - January 16, 2016 Category: Radiology Source Type: research
Magnetic resonance imaging characteristics of ischemic stroke in an Afro-Caribbean population: A 1-year prospective MRI study on 534 consecutive patients
Conclusion Our prospective, consecutive, ischemic stroke series gives a comprehensive description of ischemic stroke imaging patterns and etiologic distributions in an Afro-Caribbean population with high socio-economic status. Our patients’ stroke characteristics are close to those of European-descent populations.
Source: Journal of Neuroradiology - November 8, 2016 Category: Radiology Source Type: research
