Micro Resonant Marker for Endovascular Catheter Tracking in Interventional MRI: In Vitro Imaging at 3T

The purpose of this study was to design and manufacture a miniature resonant structure for use as a bright marker on endovascular catheters for use in interventional magnetic resonance imaging (iMRI) procedures. Resonant markers were positioned Parallel with B ₀ in a water phantom and imaged using a spoiled gradient echo sequence with a low flip angle. Prior to imaging, a network analyzer was used to tune the markers to the desired frequency of 127.72 MHz for operation at 3T. The marker provides an opportunity to safely and accurately perform MR guided procedures with smaller devices than previously possible.

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