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Abstract #4427

Comparison of universal phase shims determined from simulated and measured B1+ maps in the prostate and heart at 7T

Saskia Wildenberg1, Nico Egger2, Sophia Nagelstraßer2, Ralph Kimmlingen3, Titus Lanz4, Armin M. Nagel2,5, and Andreas K. Bitz1
1Electrical Engineering and Information Technology, University of Applied Sciences - FH Aachen, Aachen, Germany, Aachen, Germany, 2Institute of Radiology, Friedrich-Alexander Universität Erlangen-Nürnberg (FAU), Erlangen, Germany, Erlangen, Germany, 3Siemens Healthcare GmbH, Erlangen, Germany, Erlangen, Germany, 4Rapid Biomedical GmbH, Rimpar, Germany, Rimpar, Germany, 5Division of Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, Heidelberg, Germany

Synopsis

Keywords: RF Pulse Design & Fields, Simulations

Universal RF shimming is a proven method to avoid the time-consuming process of calculating patient-specific RF shims for every individual subject. Nevertheless, this method requires numerous B1+ maps from in vivo measurements, which is a time-consuming process, especially in the context of product development. This work therefore investigates whether a universal RF shim based on simulated B1+ maps, which are needed for the safety assessment of the coil anyways, is a viable alternative compared to shim optimization based on in vivo data. The study was performed using a torso coil at 7T for the prostate and cardiac region.

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