Keywords: Parallel Transmit & Multiband, Parallel Transmit & Multiband, RF Pulse Design
Motivation: The bSSFP sequence is a highly efficient acquisition strategy that provides high SNR. At ultra-high field it becomes more susceptible to B0 inhomogeneities which leads to banding artifacts and signal loss.
Goal(s): To eliminate banding artifacts without SNR loss or time penalty.
Approach: A pair of parallel transmit (pTx) pulses was designed to compensate for the off-resonance dephasing accumulated over the duration of one TR in the human brain at 7T.
Results: With a tailored pair of pTx pulses it was possible to compensate for off-resonance effects which lead to banding artifacts whilst also providing a uniform excitation in a single bSSFP acquisition.
Impact: Parallel transmit is well known for efficient radiofrequency pulse designs that produce uniform excitations. We showed that pTx pulses can simultaneously address other off-resonance effects accumulated over the duration of one TR in the human brain at 7 Tesla.
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