Iulius Dragonu1, Craig Buckley1, Peter Weale1, Matthew D Robson2, and Aaron T Hess2
1Siemens Healthcare Ltd, Frimley, Camberley, United Kingdom, 2University of Oxford Centre for Clinical Magnetic Resonance Research (OCMR), John Radcliffe Hospital, Headington, United Kingdom
Radiofrequency shimming with multiple channel
excitation is a well established method to increase the transverse magnetic
field homogeneity and reduce SAR at high magnetic field strength(≥7T). To harness the benefits of a
parallel transmit system, the magnitude and relative phase of each transmit
channel must be determined during a calibration scan. We propose a new strategy to accelerate the
acquisition of such calibration images by simultaneously exciting several transmit
channels and reconstructing the calibration images using the technique similar
to simultaneous multi-slice acquisitions.
