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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 Bever1,2, Henrik Odéen 1,2, and Dennis L. Parker1,2

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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