Abstract #0649

An Aerosol-Deposited Wireless Resonant Marker for Catheter Tracking in Interventional MRI

Caroline D. Jordan¹, Bradford R. H. Thorne¹, Arjun Wadhwa², Vincent Fratello², Alastair J. Martin¹, Xiaoliang Zhang^1,3, and Steven W. Hetts¹

¹Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA, United States, ²Quest Integrated, LLC, Kent, WA, United States, ³UC Berkeley-UCSF Graduate Program in Bioengineering, University of California, Berkeley, Berkeley, CA, United States

Catheter visualization and guidance under MRI guidance can be challenging, and conventional MR tracking coils decrease the flexibility and increase the profile of catheters. We used aerosol jet deposition to print a capacitor and an inductor with a double helix geometry on a polymer catheter. bSSFP sequences with flip angles 5°, 15°, and 90°, and a B₁+ map were acquired at 3T, and CNR and amplification were measured. The marker demonstrated good CNR and B₁+ signal amplification, suggesting that fabrication of complete 3D printed LC circuits for use as markers on catheters is feasible and can exhibit good tracking characteristics.

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