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Related Experiment Videos

Catheter tracking and visualization using 19F nuclear magnetic resonance.

Sebastian Kozerke1, Sanjeet Hegde, Tobias Schaeffter

  • 1Institute for Biomedical Engineering, University of Zurich, Switzerland. kozerke@biomed.ee.ethz.ch

Magnetic Resonance in Medicine
|August 31, 2004
PubMed
Summary

This study introduces a safe method for visualizing catheters using 19F nuclear magnetic resonance (NMR) and proton imaging. It enables real-time tip tracking and full catheter length visualization without modifying existing devices.

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Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Nuclear Magnetic Resonance

Background:

  • Current catheter visualization methods have limitations, including safety concerns with active markers and insufficient contrast with passive methods.
  • There is a need for improved, safe, and versatile catheter visualization techniques in medical procedures.

Purpose of the Study:

  • To develop and evaluate a novel catheter visualization and localization technique using 19F NMR combined with proton imaging.
  • To enable both real-time catheter tip tracking and non-real-time visualization of the entire catheter length.

Main Methods:

  • Extended a standard imaging system for 19F excitation and signal detection.
  • Implemented two operational modes: real-time tip tracking and non-real-time length visualization.

Related Experiment Videos

  • Conducted phantom experiments using an angiographic balloon catheter filled with perfluorooctylbromide (PFOB).

    • Main Results:

    • Successfully demonstrated real-time tip tracking during catheter motion.
    • Achieved visualization of the entire catheter length for various configurations.
    • Confirmed sufficient signal reception using limited bandwidth excitation at PFOB's CF2 group resonances.

    Conclusions:

    • The proposed 19F NMR and proton imaging method offers a safe and effective alternative for catheter visualization.
    • This technique does not require modification of commercially available catheters, unlike electrical or optical devices.
    • The approach provides enhanced contrast and enables visualization of the entire catheter length, addressing limitations of existing methods.