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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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