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Related Concept Videos

Imaging Studies VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

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...
Brain Imaging01:14

Brain Imaging

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 Stimulation (TMS).
Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

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,...
Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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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Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...

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Related Experiment Video

Updated: Jun 8, 2026

Integrated Photoacoustic, Ultrasound, and Angiographic Tomography (PAUSAT) for NonInvasive Whole-Brain Imaging of Ischemic Stroke
06:45

Integrated Photoacoustic, Ultrasound, and Angiographic Tomography (PAUSAT) for NonInvasive Whole-Brain Imaging of Ischemic Stroke

Published on: June 2, 2023

Imaging of acute stroke.

José G Merino1, Steven Warach

  • 1Suburban Hospital Stroke Program, Bethesda, MD 20007, USA.

Nature Reviews. Neurology
|September 16, 2010
PubMed
Summary

Brain imaging like CT and MRI is crucial for acute stroke care, guiding treatment beyond just bleeding or infarct detection. Advanced MRI techniques offer superior sensitivity for early ischemic stroke and identifying potential reperfusion candidates.

Area of Science:

  • Neurology
  • Radiology
  • Medical Imaging

Background:

  • Brain imaging is essential for objective clinical decision-making in acute stroke management.
  • All suspected stroke or transient ischemic attack patients require brain CT or MRI scans.
  • Acute stroke management decisions extend beyond thrombolytic therapy and intracranial hemorrhage detection.

Purpose of the Study:

  • To provide an overview of diagnostic information from CT and MRI in acute stroke.
  • To compare the advantages and disadvantages of CT and MRI techniques for stroke assessment.
  • To highlight the role of advanced imaging in identifying acute stroke and guiding treatment.

Main Methods:

  • Review of diagnostic capabilities of noncontrast CT and gradient-recalled echo MRI for intracranial hemorrhage (ICH).

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09:21

Optimized Management of Endovascular Treatment for Acute Ischemic Stroke

Published on: January 18, 2018

Related Experiment Videos

Last Updated: Jun 8, 2026

Integrated Photoacoustic, Ultrasound, and Angiographic Tomography (PAUSAT) for NonInvasive Whole-Brain Imaging of Ischemic Stroke
06:45

Integrated Photoacoustic, Ultrasound, and Angiographic Tomography (PAUSAT) for NonInvasive Whole-Brain Imaging of Ischemic Stroke

Published on: June 2, 2023

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Brain Infarct Segmentation and Registration on MRI or CT for Lesion-symptom Mapping

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  • Evaluation of diffusion-weighted MRI sensitivity for differentiating acute ischemic stroke.
  • Assessment of multimodal CT/MRI for identifying the ischemic penumbra and guiding reperfusion therapies.

    • Main Results:

    • Noncontrast CT and gradient-recalled echo MRI demonstrate similar accuracy in diagnosing acute ICH.
    • Diffusion-weighted MRI is more sensitive than noncontrast CT for identifying acute ischemic stroke.
    • Multimodal imaging can identify the ischemic penumbra, aiding decisions on acute reperfusion therapies.
    • MRI offers a broader spectrum of cerebrovascular pathology detection compared to CT.

    Conclusions:

    • CT and MRI provide critical diagnostic information for acute stroke management.
    • Advanced MRI techniques enhance the detection of ischemic stroke and assessment for reperfusion.
    • Imaging choices impact acute intervention, in-hospital care, and secondary stroke prevention strategies.