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Abstract #2245

Initial Study on Imaging Cyclic Tissue Motion with Motion Encoding Gradients in the Shape of Wavelet Basic Functions

Yuan Le1, Jun Chen1, Phillip J. Rossman1, Bradley D. Bolster Jr.2, Stephan Kannengiesser3, and Richard L. Ehman1
1Radiology, Mayo Clinic, Rochester, MN, United States, 2MR Collaborations, Siemens Medical Solutions USA, Inc., Salt Lake City, UT, United States, 3MR Application Predevelopment, Siemens Healthcare GmbH, Erlangen, Germany


The goal of this study was to better detect cyclic motion with multiple frequencies in tissue. A novel MRE technique was developed using motion encoding gradient (MEG) pulses of multiple scales (multi-scale MRE). These MEG pulses were designed and timed to approximate a complete basis of Haar wavelet system. Our hypothesis was that a set of orthogonal MEG pulses can capture the tissue motion more efficiently and tissue motion can be reconstructed by a simple inverse transform. Initial tests were performed on a phantom and a volunteer.

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