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Abstract #3846

Clinical MRI-guided right heart catheterization with standard metallic devices using a high performance 0.55T system

Adrienne E Campbell-Washburn1, Toby Rogers1, Jaffar M Khan1, Burcu Basar1, Rajiv Ramasawmy1, Laurie P Grant1, William H Schenke1, Delaney R McGuirt1, Annette P Stine1, Daniel A Herzka1, and Robert J Lederman1

1Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States

MRI-guidance of invasive cardiovascular procedures has been limited by the unavailability of safe devices. Most cardiovascular procedures require long conductive devices (eg. guidewires and catheters) that are susceptible to RF-induced heating. Because heating is related quadratically to field strength, we propose to reduce the MRI field strength to 0.55T. Using a custom high-performance 0.55T MRI system, we performed MRI-guided catheterizations on patients with commercial metallic guidewires using standard high flip angle bSSSP real-time imaging to produce good image quality and contrast without RF-induced heating. Low field MRI combined with high-performance hardware will be fundamentally enabling for MRI guidance of invasive procedures.

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