Acoustic Radiation Force Imaging (ARFI) Based on Fast Spin Echo

MR guided Focused Ultrasound treats noninvasively many brain disorders. The skull bone in the brain induces significant distortions of the ultrasonic wave field. It is necessary to measure the acoustic field and correct it. This field is measured with Acoustic Radiation Force Imaging (ARFI) where the ultrasound induced tissue displacement, in conjunction with a gradient generates a phase shift which is read by EPI. In this abstract we describe a new ARFI sequence based on Fast Spin Echo. The new sequence is artifact free and is not affected by b0 field inhomogeneity. In addition the phase sensitivity is higher than EPI ARFI.

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