Meeting Banner
Abstract #1496

Real-time image-based tracking of B0 shim elements in flexible matrix shim arrays for dynamic B0 shimming of the abdomen

Bernhard Gruber1,2, Jason Stockmann1, Bastien Guerin1, and Lawrence L Wald1

1Department of Radiology, MR Physics & Instrumentation Group, A.A. Martinos Center for Biomedical Imaging, MGH, Harvard Medical School, Charlestown, MA, United States, 2Division MR Physics, Center for Medical Physics and Biomedical Engineering, Medical University Vienna, Vienna, Austria

High-order matrix shimming has proved useful for addressing B0 susceptibility issues but requires prior knowledge of the shim elements position. For rigid coil formers the shim loops are fixed in space and the field maps can be pre-measured in a phantom. Flexible or movable arrays used in abdominal imaging present a challenge since the element position is patient-specific. Here we introduce a marker system for rapidly detecting the element position prior to or during matrix shimming. Our tests show we can successful determine loop position to accurately generate B0 field maps in good agreement with experimentally measured maps.

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

Join Here