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| http://dx.doi.org/10.1016/j.asjsur.2024.04.189 | DOI Listing |
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Blood-brain barrier breakdown in brain ischemia: Insights from MRI perfusion imaging.
Neurotherapeutics
December 2024
Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States; Neurocritical Care Division, Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, MD, United States; Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States; Department of General Internal Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States. Electronic address:
Brain ischemia is a major cause of neurological dysfunction and mortality worldwide. It occurs not only acutely, such as in acute ischemic stroke (AIS), but also in chronic conditions like cerebral small vessel disease (cSVD). Any other conditions resulting in brain hypoperfusion can also lead to ischemia.
View Article and Find Full Text PDFComparison of normalized cerebral blood flow between different post-processing methods of dynamic susceptibility contrast perfusion-weighted imaging and arterial spin labeling in gliomas with different grading.
Quant Imaging Med Surg
December 2024
Department of Radiology, the 8th Medical Center of PLA General Hospital, Beijing, China.
Background: Two post-processing methods of dynamic susceptibility contrast perfusion-weighted imaging (DSC-PWI), arterial input function (AIF) and gamma-variate fitting (GVF), can both derive cerebral blood flow (CBF). Moreover, AIF can provide T2* and T1 leakage indicators. This study aimed to compare the consistency of normalized CBF between different post-processing methods of DSC-PWI and arterial spin labeling (ASL) in gliomas, and take the quantitative metrics percentage of signal recovery (PSR) as a reference to verify the value of T2* and T1 leakage indicators in characterizing leakage effect and evaluating the grading of gliomas.
View Article and Find Full Text PDFIntravoxel incoherent motion imaging in stroke infarct core and penumbra is related to long-term clinical outcome.
Sci Rep
November 2024
Department of Neuroradiology, University Hospital Zurich, Zurich, Switzerland.
Article Synopsis
- - Intravoxel incoherent motion (IVIM) imaging is a method used in MRI that helps assess blood flow issues in the brain during acute strokes without using contrast agents.
- - A study involving 24 stroke patients found that lower IVIM values in the infarct core and adjacent areas after treatment correlated with worse recovery outcomes 90 days later.
- - IVIM imaging may serve as a strong predictor of long-term recovery by showing impaired blood flow in damaged brain regions, demonstrating its potential for improving stroke assessments.
Recruitment of pial collaterals and carotid occlusive disease in large-vessel occlusion ischemic stroke.
Front Neurol
October 2024
Department of Neurology, University Hospital Frankfurt (Goethe University), Frankfurt, Germany.
Background And Purpose: Despite the fundamental role of pial collateral vessels in limiting the progression of ischemic tissue injury in acute stroke with large vessel occlusion (LVO), in addition to the fact that collateral vessel abundance varies naturally from person to person for genetic reasons, there is limited knowledge regarding potential factors contributing to inherent interindividual variation in pial collateral supply. As it has been repeatedly hypothesized that chronic carotid occlusive disease may favor pial collateralization, we aimed to investigate the association between quantitatively assessed leptomeningeal collateral supply and pre-existing carotid stenosis in patients with acute stroke due to LVO.
Materials And Methods: Patients with proximal middle cerebral artery (MCA) occlusion with or without additional internal carotid artery (ICA) occlusion were included.
Advancing ischemic stroke diagnosis and clinical outcome prediction using improved ensemble techniques in DSC-PWI radiomics.
Sci Rep
November 2024
School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen University, Shenzhen, 518055, China.
Ischemic stroke is a leading global cause of death and disability and is expected to rise in the future. The present diagnostic techniques, like CT and MRI, have some limitations in distinguishing acute from chronic ischemia and in early ischemia detection. This study investigates the function of ensemble models based on the dynamic radiomics features (DRF) from the dynamic susceptibility contrast perfusion-weighted imaging (DSC-PWI) ischemic stroke diagnosis, neurological impairment assessment, and modified Rankin Scale (mRS) outcome prediction).
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