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Total 155 results found since Jan 2013.

Multiclass machine learning vs. conventional calculators for stroke/CVD risk assessment using carotid plaque predictors with coronary angiography scores as gold standard: a 500 participants study
AbstractMachine learning (ML)-based algorithms for cardiovascular disease (CVD) risk assessment have shown promise in clinical decisions. However, they usually predict binary events using only conventional risk factors. Our overall goal was to develop the “multiclass machine learning (MCML)-based algorithms” (labelled as AtheroEdge 3.0ML) and assess whether considering carotid ultrasound imaging fused with conventional risk factors can provide better CVD/stroke risk prediction than conventional CVD risk calculators (CCVRC). Carotid ultrasound and coronary angiography were performed on 500 participants. Stenosis in the ...
Source: The International Journal of Cardiovascular Imaging - November 12, 2020 Category: Radiology Source Type: research

Added value of systemic inflammation markers in predicting pulmonary infection in stroke patients: A retrospective study by machine learning analysis
This study aimed to develop machine learning (ML)-based predictive models for pulmonary infection. Between January 2008 and April 2021, a retrospective analysis of 1397 stroke patients who had CT angiography from skull to diaphragm (including CT of the chest) within 24 hours of symptom onset. A total of 21 variables were included, and the prediction model of pulmonary infection was established by multiple ML-based algorithms. Risk factors for pulmonary infection were determined by the feature selection method. Area under the curve (AUC) and decision curve analysis were used to determine the model with the best resolut...
Source: Medicine - December 30, 2021 Category: Internal Medicine Tags: Research Article: Observational Study Source Type: research

Bifurcation matching for consistent cerebral vessel labeling in CTA of stroke patients
ConclusionFormulating the vessel labeling process as a maximization task for bifurcation matching can vastly improve accurate vessel tracing. The proposed algorithm only uses simple features and does not require expensive training data.
Source: International Journal of Computer Assisted Radiology and Surgery - February 20, 2023 Category: Intensive Care Source Type: research

Velocity Curvature Index: a Novel Diagnostic Biomarker for Large Vessel Occlusion
AbstractDespite being a conveniently portable technology for stroke assessment, Transcranial Doppler ultrasound (TCD) remains widely underutilized due to complex training requirements necessary to reliably obtain and interpret cerebral blood flow velocity (CBFV) waveforms. The validation of objective TCD metrics for large vessel occlusion (LVO) represents a first critical step toward enabling use by less formally trained personnel. In this work, we assess the diagnostic utility, relative to current standard CT angiography (CTA), of a novel TCD-derived biomarker for detecting LVO. Patients admitted to the hospital with stro...
Source: Translational Stroke Research - October 6, 2018 Category: Neurology Source Type: research

Detection of emergent large vessel occlusion stroke with CT angiography is high across all levels of radiology training and grayscale viewing methods
ConclusionsDiagnostic performance in ELVO detection with CTA was high across all levels of radiologist training level. Grayscale inversion offered no significant detection advantage.Key Points•Stroke is an acute vascular syndrome that requires acute vascular imaging.•Proximal large vessel occlusions can be identified quickly and accurately by radiologists across all training levels.•Grayscale inversion demonstrated minimal detectable benefit in the detection of proximal large vessel occlusions.
Source: European Radiology - July 6, 2020 Category: Radiology Source Type: research

Comparison of porcine and human vascular diameters for the optimization of interventional stroke training and research
This study aimed to determine a porcine weight group, in which the arterial diameters most closely match human cerebral artery diameters, and thus optimize the porcine in-vivo model for neuroendovascular purposes. A group of 42 German Landrace swine (45–74 kg) was divided into four subgroups according to their weight. Angiographic images of the swine were used to determine the arterial diameter of the main branches of the subclavian artery: axillary artery, brachial artery, exter nal thoracic artery, subscapular artery (at two different segments), suprascapular artery, caudal circumflex humeral artery, thoracodorsal arte...
Source: PLoS One - May 3, 2022 Category: Biomedical Science Authors: Nathalie Mathern Source Type: research

CTA in acute stroke: short intensive training intervention is highly effective in improving radiologists' performance
To determine whether focussed radiology training in reporting stroke computed tomography angiography (CTA) improved diagnostic performance of general radiology specialty trainees staffing regional on call rotas.
Source: Clinical Radiology - May 30, 2017 Category: Radiology Authors: E.A. Cora, G.A. Ford, D. Flynn, P. Gonsalves, P. White Source Type: research

Society of Interventional Radiology Training Guidelines for Endovascular Stroke Treatment
In 2009, the Society of Interventional Radiology (SIR) published training guidelines for intraarterial catheter-directed treatment of acute ischemic stroke (1). At that time, catheter-directed thrombolysis was the dominant endovascular therapy and the only such therapy studied in randomized trials (2,3). Only first-generation mechanical thrombectomy devices were available. Computed tomographic (CT) angiography, magnetic resonance (MR) angiography, and perfusion imaging were not routinely used for assessment of large-vessel occlusion and/or parenchymal infarction and ischemia.
Source: Journal of Vascular and Interventional Radiology : JVIR - September 2, 2019 Category: Radiology Authors: David Sacks, Mazen K. AbuAwad, Sun Ho Ahn, Mark O. Baerlocher, Paul S. Brady, John W. Cole, Sabeen Dhand, Benjamin D. Fox, Joseph J. Gemmete, Joanna W. Kee-Sampson, Vance McCollom, Parag J. Patel, Martin G. Radvany, Robert D. Tomalty, Venu Vadlamudi, Mich Tags: Standards of Practice Source Type: research

Mechanical thrombectomy for a 12-year-old boy with acute ischemic stroke: A case report
Conclusions: Mechanical thrombectomy can be performed safely for children with AIS, but needs a further research with large samples.
Source: Medicine - July 24, 2020 Category: Internal Medicine Tags: Research Article: Clinical Case Report Source Type: research

Automated CT angiography collateral scoring in anterior large vessel occlusion stroke: A multireader study
CONCLUSION: Automated assistance for CTA-CS using e-CTA software provided helpful decision support for readers in terms of improving scoring accuracy and reading efficiency for physicians with a range of experience and training backgrounds and leading to significant improvements in inter-rater agreement.PMID:36650942 | DOI:10.1177/15910199221150470
Source: Interventional Neuroradiology - January 18, 2023 Category: Radiology Authors: Mohamed Sobhi Jabal David F Kallmes George Harston Norbert Campeau Kara Schwartz Steven Messina Carrie Carr John Benson Jason Little Alex Nagelschneider Ajay Madhavan Deena Nasr Sherry Braksick James Klaas Eugene Scharf Cem Bilgin Waleed Brinjikji Source Type: research

Radiomics analysis for predicting malignant cerebral edema in patients undergoing endovascular treatment for acute ischemic stroke
CONCLUSION: A CT image-based radiomics signature is a promising tool for predicting MCE in patients with acute anterior circulation infarction after EVT. For clinicians, it may assist in diagnostic decision-making.PMID:36988060 | DOI:10.4274/dir.2023.221764
Source: Diagnostic and Interventional Radiology : The Turkish Society of Radiology - March 29, 2023 Category: Radiology Authors: Xuehua Wen Xingfei Hu Yanan Xiao Junfa Chen Source Type: research

Could testing grip strength predict heart disease risk?
Conclusion These are interesting results from a range of very different countries, showing that people with low muscle strength may be at higher risk of dying prematurely than other people. Earlier studies in high-income countries had already suggested that this was the case, but this is the first study to show it holds true across countries from high to low incomes. The study also shows that Europeans, and men from high-income countries, on average, have higher grip strength than people from lower-income countries. Interestingly, women from middle-income regions, such as China and Latin America, had slightly higher muscl...
Source: NHS News Feed - May 14, 2015 Category: Consumer Health News Tags: Heart/lungs Medical practice Source Type: news

Right Fusiform Gyrus Infarct with Acute Prosopagnosia
Acta Neurol Taiwan. 2022 Dec 30;31(4):186-187.ABSTRACTA 56-year-old, right-handed man with no known past medical history presented with sudden onset of inability to recognize familiar individuals in person, including his wife and his mother. He also couldn't recognize himself in the mirror. There was no weakness, numbness, visual disturbances, or speech difficulty. Face recognition test, using Warrington Recognition Memory Test (1), showed the presence of complete prosopagnosia. The rest of the neurological and cranial nerves examinations were normal. Magnetic resonance imaging (MRI) of the brain showed restricted diffusio...
Source: Acta Neurologica Taiwanica - April 26, 2022 Category: Neurology Authors: Yeow-Hoay Koh Source Type: research