Changes in Attenuation Coefficient in MRgFUS Treatments of In-Vivo Rabbit Thigh Estimated using MRTI-Derived Specific Absorption Rate Patterns

Urvi Vyas¹, Allison Payne¹, Nick Todd¹, Dennis L. Parker¹, Robert B. Roemer¹, Douglas A. Christensen¹

The accuracy of acoustic properties used in beam simulation techniques impacts the accuracy and efficacy of treatment planning and control in Magnetic Resonance Imaging-guided focused ultrasound surgery (MRIgFUS). In this research we use the traditional rate of heating technique with an optimization routine, MR-temperature imaging and a fast beam propagation technique to non-invasively estimate subject-specific tissue acoustic properties.