Matching Motion Sensitivity with TE and TR in Elastography for Faster Scans

Roger C. Grimm¹, Jun Chen¹, Scott A. Kruse¹, Richard L. Ehman¹

Elastography acquisitions measure a propagating complex shear wave field at multiple phase points to estimate stiffness. In general there are 3 polarizations, x, y, z. Using the TR to advance the phase in a multi-frequency acquisition has been previously described. The purpose of this work is to examine timing options where the TR provides the phase advance in interleaved 3 polarization acquisitions. This eliminates misregistration of the wave fields images. When there is no gradient dead time, this results in discrete TE/TR and motion sensitivity values.