Acoustic Radiation Force Imaging (ARFI) Based on Fast Spin Echo
Yuval Zur 1
GE Healthcare, Tirat Carmel, Israel
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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