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Purpose
Neurovascular MRI suffers from a rapid drop in B1+ into the neck when using transmit head coils at 7 T. One solution to improving B1+ magnitude in the major feeding arteries in the neck is to use custom RF shims on parallel‐transmit head coils. However, calculating such shims requires robust multichannel B1+ maps in both the head and the neck, which is challenging due to low RF penetration...
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