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Related Concept Videos

Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

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,...
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,...
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
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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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Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging
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Remote control catheter navigation: options for guidance under MRI.

Leah Muller1, Maythem Saeed, Mark W Wilson

  • 1Department of Radiology and Biomedical Imaging, University of California San Francisco, 505 Parnassus Avenue, L-352, San Francisco, CA 94143-0628, USA. steven.hetts@ucsf.edu

Journal of Cardiovascular Magnetic Resonance : Official Journal of the Society for Cardiovascular Magnetic Resonance
|June 5, 2012
PubMed
Summary

Magnetic resonance imaging (MRI) offers a promising alternative for guiding endovascular interventions. However, remote catheter control under MRI guidance requires further development for safety and reliability before clinical use.

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Area of Science:

  • Medical Imaging
  • Interventional Radiology
  • Biomedical Engineering

Background:

  • Image-guided endovascular interventions are increasingly common.
  • Magnetic resonance imaging (MRI) is a potential alternative to X-ray fluoroscopy for guiding these procedures.
  • Remote catheter control under MRI guidance presents unique challenges and opportunities.

Purpose of the Study:

  • To review the benefits and limitations of MRI-guided remote control interventions.
  • To summarize tools for catheter guidance in magnetic environments.
  • To identify necessary improvements for clinical accessibility.

Main Methods:

  • Review of existing literature on MRI-guided remote control catheter designs.
  • Comparison of different guidance systems (electromagnetic microcoil, ferromagnetic sphere, smart material, hydraulic).
  • Evaluation of systems based on visualization, safety, and performance metrics (bending angle, rotation, miniaturization).

Main Results:

  • Several remote control catheter designs exist, including electromagnetic microcoil, ferromagnetic sphere-tipped, smart material-actuated, and hydraulically actuated catheters.
  • Performance varies across designs regarding bending angles, actuation time, rotation, and miniaturization.
  • Current MRI-guided remote control interventions face safety and reliability challenges.

Conclusions:

  • MRI-guided endovascular interventions using remote steering are still in early development.
  • Significant experimental research is required to address safety and reliability concerns.
  • Further advancements are needed for widespread clinical adoption.