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Abstract #5428

In Vivo Targeting Accuracy Assessment of a MR-guided Focused Ultrasound Device (MRgFUS) Equipped with Tracking Coils

Sara Johnson1, Bryant T Svedin2, and Allison Payne3

1Bioengineering, University of Utah, Salt Lake City, UT, United States, 2Physics, University of Utah, Salt Lake City, UT, United States, 3Radiology, University of Utah, Salt Lake City, UT

MR-guided focused ultrasound (MRgFUS) ablation treatments can be improved with more accurate and faster treatment planning. In this study, a fast, automatic tracking coil system is employed to predict the ultrasound transducer focus for treatment planning purposes. The accuracy of the geometric focus predictions was assessed in vivo with a breast-specific MRgFUS device. This study reports a targeting accuracy of 3.1 ± 1.4mm, measured as the average Euclidean distance between the volumetric center of mass of thermal sonications and their predicted focal locations.

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