Abstract #2102

MR-Shear Wave Elasticity Imaging (SWEI) with Bipolar Motion-Encoding Gradients

Yuan Zheng¹, Michael Marx¹, Rachelle R. Bitton¹, and Kim Butts Pauly¹

¹Radiology, Stanford University, Stanford, CA, United States

We have demonstrated a method for shear wave elasticity imaging (SWEI). A shear wave was generated by a short focused ultrasound (FUS) pulse, and was tracked by collecting images with different delays (t_delay) between the FUS pulse and bipolar motion-encoding gradients (MEG). The time-of-flight (TOF) at each pixel was determined by the zero-crossing of the image phase as a function of t_delay. Based on the TOF map, a shear wave velocity map was generated in polar coordinates.

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