Comparing Bloch-Siegert B1+ Mapping using Single Channel and Channel Combination Tx Methods
Mohammad Mehdi Khalighi 1 , Gaohong Wu 2 , and Qin Liu 2
Applied Science Lab, GE Healthcare, Menlo
Park, CA, United States,
Engineering, GE Healthcare, Waukesha, WI, United States
The adiabatic Bloch-Siegert B1 mapping is optimized for
single channel transmit and channel combination transmit
methods. Phantom comparison shows that single channel
transmit has a better SNR for B1+ magnitude and phase.
The two methods are also compared in parallel transmit
application with a 3-spoke pTx RF pulse design where it
is shown that single channel transmit method results in
a better homogeneity. It is concluded that unlike DAM
and AFI, the single channel transmit method is preferred
over channel combination for B-S B1 mapping.
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