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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