Related Experiment Videos
Visualization of vascular guidewires using MR tracking
M E Ladd1, G G Zimmermann, G C McKinnon
1Department of Radiology, University Hospital Zürich, Switzerland. ladd@dmr.usz.ch
Journal of Magnetic Resonance Imaging : JMRI
|March 21, 1998
Summary
Magnetic Resonance (MR) guided vascular interventions are advanced by actively tracking miniature guidewires. This study demonstrates real-time MR tracking of a guidewire and catheter in swine, paving the way for safer procedures.
Area of Science:
- Medical Imaging
- Interventional Radiology
- Biomedical Engineering
Background:
- Minimally invasive vascular interventions require precise instrument navigation.
- Current methods often lack real-time, non-ionizing visualization of guidewires and catheters.
- Magnetic Resonance (MR) offers potential for real-time guidance without ionizing radiation.
Purpose of the Study:
- To develop and validate an MR-trackable vascular guidewire.
- To assess the feasibility of simultaneous MR tracking of a guidewire and catheter in vivo.
- To advance the potential for MR-guided vascular interventions.
Main Methods:
- A vascular guidewire was modified with an integrated miniature radiofrequency (RF) receive coil at its tip.
- In vitro testing validated the guidewire's MR tracking capabilities.
- Simultaneous MR tracking of the guidewire and a catheter was performed in the aortic and abdominal vasculature of a swine model at 1.5 Tesla.
Main Results:
- Successful active MR tracking of a .035-inch guidewire was achieved.
- The system demonstrated the ability to simultaneously track both a guidewire and a catheter in vivo.
- Feasibility of tracking small, clinically relevant interventional devices was confirmed.
Conclusions:
- Active MR tracking of miniature vascular guidewires is feasible.
- Simultaneous multi-device tracking under MR guidance is achievable.
- This technology represents a significant advancement for MR-guided vascular interventions.