Meeting Banner
Abstract #3953

3D k-Space Domain Parallel Transmit Pulse Design

Jun Ma1,2, Bernhard Gruber3,4, Xinqiang Yan5, and William Grissom2
1Department of Radiology, Stanford University, Stanford, CA, United States, 2Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, United States, 3A. A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, United States, 4Division MR Physics, Center for Medical Physics and Biomedical Engineering, Medical University Vienna, Vienna, Austria, 5Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, TN, United States

Current parallel transmit pulse design is based on a spatial domain formulation that has prohibitive memory and computational requirements when the number of coils or the number of dimensions is large. We previously introduced a k-space domain method that produces a sparse matrix relating any target excitation pattern in k-space to the pulses that produce it, which can be finely parallelized, has much smaller memory footprint, and can compensate off-resonance. Here we validate the algorithm for 3D inner-volume excitation using a simulated 24-channel transmit array and a SPINS trajectory, with comparisons to conventional iterative spatial domain designs.

This abstract and the presentation materials are available to members only; a login is required.

Join Here