Neither Flat Profile Nor Black Spots: A Simple Method to Achieve Acceptable CP-Like Mode Transmit B1 Pattern for Whole Brain Imaging with Transmit Arrays at 7 Tesla

Keywords

absolute acceptable achieve actual advantage affordable allowing amplifiers another arrays avoiding avoids becoming black brain calculating calibration categories challenge channel channels coil coils collect combined components computation computations configurations consequence considered consists console constraint control cost covering critical dark defined deliberately despite destructive determine direct drawn efficiency efficient entire even except excited fitting five flat formation generate generates good head heterogeneity homogeneity illustrated improving incident increasingly indispensable individual initial interference interferences known lacks like linear local lowest magnitude manually maps maximizing measured minimizing mitigate mode moderately necessarily necessitate node nodes optimization optimized otherwise overall part pattern patterns periphery popular power practical predicted problem properly providing pure quantitative random reasonable reasonably reduced reduces reflected regime repeating residual routine scanning setting settings shape shaped shim shimming short significantly simple slice slices solution solutions spatial specifically spherical spots start started starting strategies target thick tight transceiver transmit typically ultra unit utilize variations vectors whole