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Specialty: Radiology
Procedure: PET Scan

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Total 747 results found since Jan 2013.

18F-Fluoride and 18F-Fluorodeoxyglucose Positron Emission Tomography After Transient Ischemic Attack or Minor Ischemic Stroke: Case-Control Study Molecular Imaging
Conclusions— 18F-Fluoride PET/CT highlights culprit and phenotypically high-risk carotid plaque. This has the potential to improve risk stratification and selection of patients who may benefit from intervention.
Source: Circulation: Cardiovascular Imaging - March 14, 2017 Category: Radiology Authors: Vesey, A. T., Jenkins, W. S. A., Irkle,, A., Moss, A., Sng,, G., Forsythe, R. O., Clark, T., Roberts, G., Fletcher, A., Lucatelli, C., Rudd, J. H. F., Davenport,, A. P., Mills, N. L., Al-Shahi Salman, R., Dennis, M., Whiteley, W. N., van Beek, E. J. R., D Tags: Translational Studies, Imaging, Nuclear Cardiology and PET, Cerebrovascular Disease/Stroke, Atherosclerosis Molecular Imaging Source Type: research

MRI Room Service: Portable Machine Brings In-Room Scans to Stroke Patients
Bedside MRI could offer stroke patients a safer alternative to conventional MRI.
Source: Diagnostic Imaging - February 12, 2020 Category: Radiology Authors: Whitney J. Palmer Tags: Brain MRI New Products Stroke Source Type: news

Automated MRI-based volumetry of basal ganglia and thalamus at the chronic phase of cortical stroke
ConclusionAutomated MR morphometry demonstrated atrophy of ipsilateral basal ganglia and thalamus at the chronic phase after cortical stroke in the MCA territory. The atrophy was related to stroke volume. These results confirm the potential role for automated MRI morphometry to assess remote changes after stroke.
Source: Neuroradiology - June 16, 2020 Category: Radiology Source Type: research

Assessment of longitudinal hippocampal atrophy in the first year after ischemic stroke using automatic segmentation techniques
Publication date: Available online 22 October 2019Source: NeuroImage: ClinicalAuthor(s): Mohamed Salah Khlif, Emilio Werden, Natalia Egorova, Marina Boccardi, Alberto Redolfi, Laura Bird, Amy BrodtmannAbstractWe assessed first-year hippocampal atrophy in stroke patients and healthy controls using manual and automated segmentations: AdaBoost, FIRST (fsl/v5.0.8), FreeSurfer/v5.3 and v6.0, and Subfields (in FreeSurfer/v6.0). We estimated hippocampal volumes in 39 healthy controls and 124 stroke participants at three months, and 38 controls and 113 stroke participants at one year. We used intra-class correlation, concordance, ...
Source: NeuroImage: Clinical - October 24, 2019 Category: Radiology Source Type: research

Validation of fast diffusion kurtosis MRI for imaging acute ischemia in a rodent model of stroke
Diffusion‐weighted imaging (DWI) captures ischemic tissue that is likely to infarct, and has become one of the most widely used acute stroke imaging techniques. Diffusion kurtosis imaging (DKI) has lately been postulated as a complementary MRI method to stratify the heterogeneously damaged DWI lesion. However, the conventional DKI acquisition time is relatively long, limiting its use in the acute stroke setting. Recently, a fast kurtosis mapping method has been demonstrated in fixed brains and control subjects. The fast DKI approach provides mean diffusion and kurtosis measurements under substantially reduced scan time, ...
Source: NMR in Biomedicine - September 10, 2014 Category: Radiology Authors: Phillip Zhe Sun, Yu Wang, Emiri Mandeville, Suk‐Tak Chan, Eng H. Lo, Xunming Ji Tags: Rapid communication Source Type: research

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

Predictors of ghost infarct core on baseline computed tomography perfusion in stroke patients with successful recanalization after mechanical thrombectomy
ConclusionsIn stroke patients achieving successful recanalization after MT, time interval from stroke onset to CTP and ischemic core volume are associated with the occurrence of GIC. Patients cannot be excluded from MT solely based on baseline CTP-derived ischemic core volume, especially for patients with a shorter onset time.Key Points• Ghost infarct core (GIC) was found in 15.7% of patients with acute ischemic stroke (AIS) in our study cohort.• GIC was associated with stroke onset time, volumetric parameters derived from CTP, and collateral status indicated by HIR.• Time interval from stroke onset to CTP scan and i...
Source: European Radiology - October 25, 2022 Category: Radiology 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

Structural covariance in subcortical stroke patients measured by automated MRI-based volumetry
Publication date: Available online 22 January 2019Source: NeuroImage: ClinicalAuthor(s): Caihong Wang, Lei Zhao, Yishan Luo, Jingchun Liu, Peifang Miao, Sen Wei, Lin Shi, Jingliang ChengAbstractA network-level investigation of the volumetric changes of subcortical stroke patients is still lacking. Here, we explored the alterations of structural covariance caused by subcortical stroke with automated brain volumetry. T1-weighed brain MRI scans were obtained from 63 normal controls (NC), 46 stroke patients with infarct in left internal capsule (CI_L), 33 stroke patients with infarct in right internal capsule (CI_R). We perfor...
Source: NeuroImage: Clinical - January 22, 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

Correlation between clot density and recanalization success or stroke etiology in acute ischemic stroke patients.
Conclusions There was no relationship between clot density and revascularization success or stroke etiology in our study. More research is needed to determine if clot density can predict recanalization rates or indicate etiology. PMID: 28604188 [PubMed - in process]
Source: Interventional Neuroradiology - June 13, 2017 Category: Radiology Tags: Interv Neuroradiol 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

The usefulness of diffusion-weighted/fluid-attenuated inversion recovery imaging in the diagnostics and timing of lacunar and nonlacunar stroke
Conclusions The presence of acute ischemic lesions only in DWI can help to identify both lacunar and nonlacunar stroke patients who are in the 4.5 h time window for intravenous thrombolysis with high specificity.
Source: Neuroradiology - September 30, 2014 Category: Radiology Source Type: research

Ischemic stroke enhancement using a variational model and the expectation maximization method
ConclusionThese results show the importance of a computational tool to assist neuroradiology decisions, especially in critical situations such as the diagnosis of ischemic stroke.Key Points• Diagnosing patients with stroke requires high efficiency to avoid irreversible cerebral damage.• A computational algorithm was proposed to enhance the visual perception of stroke.• Observers’ performance was increased with the aid of enhanced images.
Source: European Radiology - August 6, 2018 Category: Radiology Source Type: research

Mapping acute lesion locations to physiological swallow impairments after stroke
This study aimed to assess the statistical relationship between acute stroke lesion locations and impairment of specific aspects of swallow physiology. We performed lesion symptom mapping with 68 retrospectively recruited, acute, first-ever ischemic stroke patients. Lesions were determined on diffusion weighted MRI scans. Post-stroke swallow physiology was determined using the Modified Barium Swallow Study Impairment Profile (MBSImP©™). The relationship between brain lesion location and 17 physiological aspects of swallowing were tested using voxel-based and region-based statistical associations corrected for multiple c...
Source: NeuroImage: Clinical - January 22, 2019 Category: Radiology Source Type: research