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Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging

Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging

Published on: April 4, 2013

Multimode intravascular RF coil for MRI-guided interventions.

Krishna N Kurpad¹, Orhan Unal

¹Department of Radiology, University of Wisconsin, Madison, WI, USA. kurpad@wisc.edu

Journal of Magnetic Resonance Imaging : JMRI

|March 31, 2011

Summary

This summary is machine-generated.

This study shows that a single intravascular radiofrequency (RF) probe can perform active tip tracking, catheter visualization, and high signal-to-noise ratio (SNR) magnetic resonance imaging (MRI). This feasibility demonstration simplifies intravascular MRI procedures.

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Area of Science:

Medical Imaging
Biomedical Engineering
Interventional Radiology

Background:

Intravascular magnetic resonance imaging (MRI) requires advanced catheter technology for precise navigation and high-quality imaging.
Current methods often involve complex setups or compromise image quality and tracking capabilities.

Purpose of the Study:

To demonstrate the feasibility of a novel single intravascular radiofrequency (RF) probe for MRI.
To enable active tip tracking, catheter visualization, and high signal-to-noise ratio (SNR) imaging.
To simplify the MRI system interface using a single coaxial cable connection.

Main Methods:

Construction of a multimode intravascular RF coil on a 6F balloon catheter.
Interfacing the coil to a 1.5T MRI scanner using a decoupling circuit.
Conducting bench measurements and imaging experiments in saline and phantoms.

Main Results:

The multimode coil functioned as an inductively coupled transmit coil.
Demonstrated a 6 mm forward-looking capability.
Achieved a greater than 3-fold increase in SNR compared to conventional external coils.
Successfully performed simultaneous active tip tracking and catheter visualization.

Conclusions:

It is feasible to use a single multimode intravascular RF coil for advanced intravascular MRI.
This technology supports active tip tracking and catheter visualization.
High SNR imaging is achievable with a simplified single coaxial cable connection.