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Related Experiment Videos

MR Imaging-guided percutaneous tumor ablation.

Stuart G Silverman1, Kemal Tuncali, Paul R Morrison

  • 1Department of Radiology, Division of Abdominal Imaging and Intervention, Brigham & Women's Hospital, 75 Francis Street, Boston, MA 02115, USA. sgsilverman@partners.org

Academic Radiology
|August 16, 2005
PubMed
Summary
This summary is machine-generated.

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Magnetic resonance (MR) imaging-guided renal artery stenting is feasible with both low-field (0.2 T) and high-field (1.5 T) scanners. High-field MR significantly reduces procedure time without compromising stent placement precision.

Area of Science:

  • Interventional Radiology
  • Medical Imaging
  • Cardiovascular Interventions

Background:

  • Renal artery angioplasty and stenting are crucial for treating renal artery stenosis.
  • Magnetic resonance (MR) imaging offers potential for real-time guidance during these procedures.
  • Comparing different field strengths of MR scanners is important for optimizing feasibility and precision.

Purpose of the Study:

  • To compare the feasibility and precision of MR imaging-guided renal artery angioplasty and stent placement using 0.2 T and 1.5 T scanners.

Main Methods:

  • Renal artery angioplasty and stent placement were performed on seven pigs under MR guidance.
  • Two MR scanners (0.2 T and 1.5 T) were used.
  • Susceptibility artifact-based tracking guided catheter and stent placement to the renal artery, aiming for the aortic wall junction.

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Main Results:

  • MR imaging-guided angioplasty and stenting were feasible at both 0.2 T and 1.5 T.
  • Intervention time was significantly shorter at 1.5 T (under 30 minutes) compared to 0.2 T (up to 90 minutes).
  • No significant difference in stent deviation was observed between the two field strengths.

Conclusions:

  • A 1.5 T MR scanner can halve the procedure time for renal artery stenting compared to a 0.2 T system.
  • Stent placement precision was comparable between the two field strengths.
  • A dedicated MR-stent may be necessary for enhanced precision in future applications.