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Passive catheter visualization in magnetic resonance-guided endovascular therapy using multicycle projection

Jonathan N Draper1, M Louis Lauzon, Richard Frayne

  • 1Department of Electrical and Computer Engineering, University of Calgary, Calgary, Alberta, Canada.

Journal of Magnetic Resonance Imaging : JMRI
|June 8, 2006
PubMed
Abstract

Insights

Multicycle projection dephasers significantly enhance catheter visibility in MRI scans compared to conventional methods. This advancement improves the conspicuity of endovascular catheters, aiding in procedures.

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Interventional Radiology

Background:

  • Conventional projection dephaser (PD) methods have limitations in background suppression for MR imaging.
  • Improving catheter conspicuity is crucial for guiding endovascular procedures.

Purpose of the Study:

  • To evaluate multicycle projection dephasers for improved background suppression.
  • To enhance the conspicuity of endovascular catheters in MR images.

Main Methods:

  • Comparison of conventional PD and multicycle PD techniques.
  • Imaging of catheters in phantoms and canine carotid arteries.
  • Utilizing a modified spoiled gradient echo imaging sequence.

Main Results:

  • Multicycle PD yielded significantly higher catheter-to-background contrast (50.6% in homogeneous, 44.0% in heterogeneous phantoms) than conventional PD (-6.9% and 15.0%).
  • In vivo, multicycle PD achieved 53.0% contrast versus -3.1% for conventional PD in canine carotid arteries.

Conclusions:

  • Multicycle projection dephasers offer superior catheter conspicuity compared to conventional PD.
  • This technique shows promise for enhancing guidance in endovascular procedures.

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