Abstract #0820

Simultaneous Acquisition of Acoustic Radiation Force Imaging and Proton Resonance Frequency Shift Thermometry Using Interleaved Acquisition with Temporally Constrained Reconstruction for Increased Temporal Resolution

Joshua de Bever^1,2, Henrik Odéen ^1,2, and Dennis L. Parker^1,2

¹Department of Radiology, University of Utah, Salt Lake City, UT, United States, ²Utah Center for Advanced Imaging Research, Salt Lake City, UT, United States

Using focused ultrasound and MR acoustic radiation force imaging (MR-ARFI), the mechanical properties of tissues can be interrogated. Changes to tissue properties, for instance before and after a MR guided focused ultrasound thermal therapy, could help evaluate treatment success. This abstract presents a novel method for measuring acoustic radiation force simultaneously with proton resonance shift thermometry. This would enhance the safety of MR-ARFI, and provide additional temperature information that may indicate when, and at what temperature, a tissue property change occurred. Temporal resolution was enhanced by a factor of 5 by employing a temporally constrained reconstruction algorithm.

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