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Related Concept Videos

Imaging Studies VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

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DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
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Imaging Studies for Cardiovascular System IV: CMRI01:21

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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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Brain Imaging

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Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans),  magnetic resonance imaging (MRI),  functional magnetic resonance imaging (fMRI), and Transcranial Magnetic...
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Imaging Studies for Cardiovascular System V: CT01:28

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Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
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Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Author Spotlight: Integrated Photoacoustic, Ultrasound, and Angiographic Tomography (PAUSAT) for NonInvasive Whole-Brain Imaging of Ischemic Stroke
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Imaging of Ischemic Stroke.

Michelle P Lin, David S Liebeskind

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    Summary
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    Modern neuroimaging, including CT and MRI, is crucial for understanding acute stroke and guiding treatment. Advanced imaging identifies salvageable brain tissue and predicts outcomes, improving patient care for ischemic stroke.

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    Area of Science:

    • Neurology
    • Radiology
    • Vascular Medicine

    Background:

    • Cerebrovascular hemodynamics, acute stroke pathophysiology, and collateral circulation are critical components in managing ischemic stroke.
    • Modern neuroimaging techniques are essential for evaluating patients with stroke.

    Observation:

    • Multimodal CT and MRI provide detailed insights into brain and vascular health, aiding in treatment decisions and outcome prognostication.
    • Mismatch imaging can identify patients with salvageable brain tissue who may benefit from reperfusion therapy, even beyond standard time windows.
    • Collateral circulation imaging predicts reperfusion success, reduces hemorrhage risk, and improves functional outcomes.

    Findings:

    • Advanced neuroimaging identifies patients at high risk for hemorrhagic transformation or those unlikely to benefit from interventions.
    • Imaging guides therapeutic decisions by establishing diagnosis, revealing pathophysiology, and assessing potential treatment risks and benefits.

    Implications:

    • Neuroimaging significantly impacts the management of ischemic stroke, enabling personalized treatment strategies.
    • The integration of advanced imaging into clinical practice enhances patient selection for reperfusion therapies and optimizes outcomes.
    • Accurate assessment of cerebrovascular hemodynamics and collateral status through imaging is key to improving stroke care and patient prognosis.