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Abstract #0301

Simplified computational models of medical devices for accurate RF heating simulations with significantly reduced computational cost

Alan Ross Leewood 1 , Beth J Hess 1 , Matthew Huser 1 , Sharath Gopal 1 , Gonzalo G. Mendoza 2 , Maria Ida Iacono 2 , Wolfgang Kainz 2 , Sunder S Rajan 2 , and Leonardo M Angelone 2

1 MED Institute, Inc., West Lafayette, IN, United States, 2 Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, MD, United States

Many medical implants are geometrically complex and often feature very small structures. This research presents an analysis of RF-induced heating based on two examples of computational geometric simplified models. Computational simulations were performed to at 128 MHz with two different devices (an 80-mm Nitinol self-expanding stent and an 80-mm stainless steel orthopedic screw) in the ASTM phantom. For each device, a full geometric fidelity and a defeatured model were generated. The defeatured models allowed for significant reduction in computational cost (up to 75%) while showing small (less than 10%) difference of predicted RF-induced heating compared to the full featured model.

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