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Related Concept Videos

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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Comprehensive Endovascular and Open Surgical Management of Cerebral Arteriovenous Malformations
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MRI-guided vascular access with an active visualization needle.

Christina E Saikus1, Kanishka Ratnayaka, Israel M Barbash

  • 1Cardiovascular and Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892-1061, USA.

Journal of Magnetic Resonance Imaging : JMRI
|October 19, 2011
PubMed
Summary
This summary is machine-generated.

Magnetic resonance imaging (MRI) guided vascular access is feasible using a novel active needle design. This approach enhances visibility and reduces procedure time and needle passes for cardiovascular interventions.

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Area of Science:

  • Medical Imaging
  • Interventional Cardiology
  • Biomedical Engineering

Background:

  • Vascular access is a critical step in cardiovascular catheterization.
  • Current imaging modalities like X-ray and ultrasound may require adjunctive facilities.
  • MRI-guided procedures offer potential for enhanced visualization.

Purpose of the Study:

  • To develop and evaluate an approach for vascular access under MRI guidance.
  • To create an "active" MRI antenna-needle for improved visibility.
  • To integrate vascular access into comprehensive MRI-guided cardiovascular interventions.

Main Methods:

  • Jugular vein access was performed in a porcine model.
  • Real-time MRI guidance with reduced field of view imaging was utilized.
  • An "active" MRI antenna-needle was compared against a passive needle for visibility and performance.

Main Results:

  • MRI-guided central vein access was successfully achieved with both needle types.
  • The active MRI needle significantly reduced procedure time (88 vs. 244 sec) and needle passes (4.5 vs. 9.1).
  • Performance improvements were independent of operator experience.

Conclusions:

  • MRI-guided vascular access is feasible in an animal model.
  • The active needle design enhances MRI visibility during vascular access.
  • This technique enables wholly MRI-guided procedures, potentially facilitating complex cardiovascular interventions.