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Total 2908 results found since Jan 2013.

Accuracy and Prognostic Role of NCCT-ASPECTS Depend on Time from Acute Stroke Symptom-onset for both Human and Machine-learning Based Evaluation
ConclusionThe accuracy and reliability of NCCT-ASPECTS are time dependent for both human and machine-learning based evaluation, indicating reduced detectability of fast stroke progressors by NCCT. In hyperacute stroke, collateral status from CT-angiography may help for a  better prognosis on clinical outcome and explain the occurrence of futile recanalization.
Source: Klinische Neuroradiologie - October 28, 2021 Category: Radiology Source Type: research

Percutaneous transluminal angioplasty and stenting in acute stroke caused by basilar artery steno-occlusive disease: The experience of a single stroke centre
CONCLUSIONS: Percutaneous transluminal angioplasty and stenting showed to be a technically feasible and reasonably safe procedure in selected patients. However, good clinical outcomes may be difficult to achieve as only 43.5% of the patients remained independent at 3 months. Randomized studies are needed to confirm the efficacy and safety outcomes of percutaneous transluminal angioplasty and stenting in acute stroke caused by basilar artery steno-occlusive disease.PMID:34704502 | DOI:10.1177/15910199211051830
Source: Interventional Neuroradiology - October 27, 2021 Category: Radiology Authors: Manuel Machado Gon çalo Borges de Almeida Marta Sequeira Filipa Pedro Alberto Fior Rui Carvalho Isabel Fragata Jo ão Reis Ana Paiva Nunes Source Type: research

Influence of Pulse Wave Velocity on Atherosclerosis and Blood Flow Reversal in the Aorta: A 4-Dimensional Flow Magnetic Resonance Imaging Study in Acute Stroke Patients and Matched Controls
Conclusions: Aortic stiffness was higher in stroke patients and associated with a higher prevalence of plaques. Increased PWV was an independent predictor of plaque presence. Accordingly, regional PWV seems to be a valuable biomarker for the assessment and management of aortic atherosclerosis. However, no association was found for increased retrograde flow extent from the DAo.
Source: Journal of Thoracic Imaging - December 17, 2021 Category: Radiology Tags: Original Articles Source Type: research

Reduced Leukoaraiosis, Noncardiac Embolic Stroke Etiology, and Shorter Thrombus Length Indicate Good Leptomeningeal Collateral Flow in Embolic Large-Vessel Occlusion ADULT BRAIN
CONCLUSIONS: Among patients with embolic large-vessel occlusion, reduced leukoaraiosis, noncardiac embolism mechanisms including embolisms of arterial or undetermined origin, and shorter thrombus length in cardioembolism are indicators of good collateral flow.
Source: American Journal of Neuroradiology - January 13, 2022 Category: Radiology Authors: Hashimoto, T., Kunieda, T., Honda, T., Scalzo, F., Ali, L., Hinman, J. D., Rao, N. M., Nour, M., Bahr-Hosseini, M., Saver, J. L., Raychev, R., Liebeskind, D. Tags: ADULT BRAIN Source Type: research

Hemorrhagic Transformation Rates following Contrast Media Administration in Patients Hospitalized with Ischemic Stroke ADULT BRAIN
CONCLUSIONS: Iso-osmolar contrast media was associated with a lower rate of hemorrhagic transformation compared with low-osmolar contrast media in patients with ischemic stroke.
Source: American Journal of Neuroradiology - March 10, 2022 Category: Radiology Authors: Moser, F. G., Todoran, T. M., Ryan, M., Baker, E., Gunnarsson, C., Kellum, J. A. Tags: ADULT BRAIN Source Type: research

Imaging biomarkers can help transform stroke prevention
A large global study in stroke patients has shown how MRI biomarkers to estimat...Read more on AuntMinnie.comRelated Reading: Disparities remain in neuroimaging utilization for stroke NaF-PET scans reveal plaque -- and possible risk of stroke Can dental images help prevent strokes? CT angio offers late thrombectomy option to stroke patients Use AI with CT to better assess stroke patients' collateral flow
Source: AuntMinnie.com Headlines - May 9, 2022 Category: Radiology Source Type: news

Association of dissection features and primary collateral circulation with ischemic stroke in patients with spontaneous internal carotid artery dissection: Evaluated using vessel Wall-MRI and MRA
CONCLUSIONS: Both the poor primary collateral circulation and severe stenosis may play important role in occurrence of ischemic stroke for spontaneous ICAD patients and good primary collateral circulation can help to reduce the incidence of infarction.ADVANCES IN KNOWLEDGE: ICAD is one of the major causes of ischemic stroke. Early evaluation of the status of the Circle of Willis in ICAD patients by MRI may help to make treatment strategies and improve clinical outcome.PMID:35816551 | DOI:10.1259/bjr.20210845
Source: The British Journal of Radiology - July 11, 2022 Category: Radiology Authors: Srijana Shrestha Han Bao Heyi Gu Chao Gao Yizhen Zeng Kaipeng Xie Yixin Shi Lei Zhao Bo He Wei Zhao Zhiwei Tang Zongfang Li Source Type: research

Outcomes of young patients following mechanical thrombectomy for stroke: A systematic review and meta-analysis
CONCLUSIONS: Following mechanical thrombectomy for AIS, patients aged 18-65 years achieved relatively high rates of functional independence and successful reperfusion and low rates of mortality and sICH.Clinical Perspective In this systematic review and meta-analysis of eight studies, we examined outcomes in young stroke patients, aged 18-65 years old, following mechanical thrombectomy for acute ischemic stroke. We found that young patients achieved high rates of functional independence, high rates of successful reperfusion, and low rates of mortality and symptomatic intracerebral hemorrhage.While there have been several p...
Source: Interventional Neuroradiology - August 18, 2022 Category: Radiology Authors: Hassan Kobeissi Michael Liu Sherief Ghozy Ramanathan Kadirvel David F Kallmes Source Type: research

Early-versus-Late Endovascular Stroke Treatment: Similar Frequencies of Nonrevascularization and Postprocedural Cerebrovascular Complications in a Large Single-Center Cohort Study INTERVENTIONAL
CONCLUSIONS: The frequency of incomplete recanalization and of cerebrovascular complications occurring after endovascular treatment is similar in early and well-selected late patients receiving endovascular treatment. Our results demonstrate the technical success and safety of endovascular treatment in well-selected late patients with acute ischemic stroke.
Source: American Journal of Neuroradiology - June 8, 2023 Category: Radiology Authors: Maslias, E., Nannoni, S., Bartolini, B., Ricciardi, F., Strambo, D., Hajdu, S. D., Puccinelli, F., Eskandari, A., Dunet, V., Maeder, P., Saliou, G., Michel, P. Tags: INTERVENTIONAL Source Type: research

A new predictor of coronary artery disease in acute ischemic stroke or transient ischemic attack patients: pericarotid fat density
ConclusionCTA-derived PFD measurements offer supplementary predictive value for obstructive CAD beyond FRS and stenosis, thereby facilitating improved risk stratification of TIA or stroke patients without a history of CAD history.Clinical relevance statementCTA-derived PFD provides incremental predictive value for obstructive coronary artery disease in acute ischemic stroke or transient ischemic attack patients without CAD history, beyond Framingham risk score and carotid artery stenosis degree, improving risk stratification.Key Points• Pericarotid fat density is associated with obstructive coronary artery disease in acu...
Source: European Radiology - September 6, 2023 Category: Radiology Source Type: research

Atrial aspiration from pulmonary and caval veins is caused by ventricular contraction and secures 70% of the total stroke volume independent of resting heart rate and heart size
ConclusionThis study demonstrated that in healthy humans at rest, approximately 30% of the total stroke volume enters the atria during ventricular diastole and approximately 70% during systole, independent of heart rate (HR) or heart size. The atria are filled through suction driven by ventricular longitudinal contraction which aspirates blood from the pulmonary and caval veins. As 70% of the atrial filling occurs during ventricular emptying, the heart volume remains relatively constant over the cardiac cycle, which minimizes pulling on surrounding tissues and therefore optimizes energy expenditure.
Source: Clinical Physiology and Functional Imaging - January 9, 2013 Category: Radiology Authors: K. Steding‐Ehrenborg, M. Carlsson, S. Stephensen, H. Arheden Tags: Original Article Source Type: research

Multi-center prediction of hemorrhagic transformation in acute ischemic stroke using permeability imaging features
Abstract: Permeability images derived from magnetic resonance (MR) perfusion images are sensitive to blood–brain barrier derangement of the brain tissue and have been shown to correlate with subsequent development of hemorrhagic transformation (HT) in acute ischemic stroke. This paper presents a multi-center retrospective study that evaluates the predictive power in terms of HT of six permeability MRI measures including contrast slope (CS), final contrast (FC), maximum peak bolus concentration (MPB), peak bolus area (PB), relative recirculation (rR), and percentage recovery (%R). Dynamic T2*-weighted perfusion MR images ...
Source: Magnetic Resonance Imaging - April 15, 2013 Category: Radiology Authors: Fabien Scalzo, Jeffry R. Alger, Xiao Hu, Jeffrey L. Saver, Krishna A. Dani, Keith W. Muir, Andrew M. Demchuk, Shelagh B. Coutts, Marie Luby, Steven Warach, David S. Liebeskind, on behalf of the STIR/VISTA Imaging Investigators Tags: Original Contributions Source Type: research

Safety and Efficacy of Endovascular Sonolysis Using the EkoSonic Endovascular System in Patients with Acute Stroke INTERVENTIONAL
CONCLUSIONS: In this small study, EkoSonic endovascular sonolysis allowed safe and potentially effective revascularization in patients experiencing acute ischemic stroke.
Source: American Journal of Neuroradiology - July 15, 2013 Category: Radiology Authors: Kuliha, M., Roubec, M., Jonszta, T., Krajca, J., Czerny, D., Krajina, A., Langova, K., Herzig, R., Prochazka, V., Skoloudik, D. Tags: INTERVENTIONAL Source Type: research

Quantitative evaluation of the axonal degeneration of central motor neurons in chronic cerebral stroke with diffusion tensor imaging.
CONCLUSION: The changes and diffusions of water molecule associated with the axonal degeneration of central motor neurons after chronic cerebral stroke can be detected by DTI, which can directly quantitatively reflect the degree and extent of axonal degeneration of central motor neurons and can compensate the shortcomings of conventional MRI and diffusion-weighted imaging (DWI). PMID: 23873888 [PubMed - as supplied by publisher]
Source: Acta Radiologica - July 19, 2013 Category: Radiology Authors: Lai C, Zhou HC, Ma XH, Zhang HX Tags: Acta Radiol Source Type: research

Chlorine and sodium chemical shift imaging during acute stroke in a rat model at 9.4 Tesla.
CONCLUSION: M 0 in the infarcted region clearly rises later and slower for chlorine than for sodium. To the best of our knowledge, these are the first combined proton, sodium, and chlorine measurements in an animal stroke model during the acute phase. PMID: 23934160 [PubMed - as supplied by publisher]
Source: Magma - August 10, 2013 Category: Radiology Authors: Baier S, Krämer P, Grudzenski S, Fatar M, Kirsch S, Schad LR Tags: MAGMA Source Type: research