Single-loop coil concepts for intravascular magnetic resonance imaging

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Interventional Radiology

Background:

• Traditional intravascular coil designs face limitations in small vessel access and imaging depth.
• The single-loop coil offers potential for miniaturization and extended coverage for multislice imaging.
• Expandable coil designs are crucial for enhancing signal-to-noise ratio (SNR) and penetration depth in intravascular applications.

Purpose of the Study:

• To develop and evaluate expandable single-loop coils for intravascular magnetic resonance imaging (MRI).
• To assess the performance of two distinct catheter-based delivery systems for these coils.
• To investigate the impact of coaxial cable design and pulsatile flow on imaging quality.

Main Methods:

• Development of self-expandable NiTinol and balloon-inflatable single-loop coils.
• Integration into commercial catheter systems for intravascular deployment.
• In vitro flow experiments and in vivo pig model studies to evaluate coil performance and image quality.

Main Results:

• Expandable single-loop coils were successfully developed and integrated into catheter systems.
• Coaxial cable design significantly influenced signal characteristics.
• Pulsatile flow demonstrably affected image quality in both in vitro and in vivo experiments.

Conclusions:

• Expandable single-loop coils represent a promising advancement for intravascular MRI.
• Catheter-based delivery systems influence coil performance and imaging outcomes.
• Understanding flow dynamics is critical for optimizing intravascular imaging quality with these novel coils.