Abstract #2104

High Speed, High Sensitivity MR-ARFI Using a Balanced Steady-State Free Precession Pulse Sequence

Yuan Zheng¹, Michael Marx¹, G. Wilson Miller², and Kim Butts Pauly¹

¹Radiology, Stanford University, Stanford, CA, United States, ²Radiology and Medical Imaging, University of Virginia, Charlottesville, VA, United States

We have developed a novel MR-ARFI technique that makes use of transition band balanced steady-state free precession (bSSFP). Due to the strong dependence of image phase on the motion-encoded phase, this technique improves the sensitivity of MR-ARFI measurements over commonly used spoiled sequences. The proposed technique also features high speed, as an ARFI contrast image can be acquired in a few seconds. With its high speed and high sensitivity, the bSSFP-ARFI technique could be useful in confirming/calibrating the HIFU focal spot before thermal ablation treatment.

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