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Abstract #3845

Ferromagnetic markers for interventional MRI devices at 0.55T

Burcu Basar1, Merdim Sonmez1, Ram Paul2, Ozgur Kocaturk1, Daniel A. Herzka1, Robert J. Lederman1, and Adrienne E. Campbell-Washburn1

1NIH, Bethesda, MD, United States, 2Cook Medical, Bloomington, IN, United States

Interventional cardiac MRI has been hampered for decades by the lack of safe and visible devices. Guidewires (long, elongated metals) risk RF-induced heating under MR, and often incorporate ferromagnetic markers (e.g.stainless steel) that can be used for image guidance. We propose MR-guided interventions at 0.55T to avoid RF-induced heating. Here we show that at 0.55T, ferromagnetic markers maintain visibility and create identical artifacts to those observed at 1.5T. We show that using a high-performance low field MRI system may enable progress in interventional MRI due to improved device safety with retained image quality.

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