We demonstrate the design and application of respiration-specific and respiration-robust three-dimensional 4kT-point pTx pulses using respiration-resolved 3D B1+ maps. The subject-specific pulses were tested on 20 B1+ maps (shallow/deep breathing) of 10 volunteers with different age and BMI and were experimentally validated in the last three volunteers at 7T. Compared to respiration-specific pulses, respiration-robust pulses resulted in a negligible overall decrease of the FA homogeneity with clear benefits of achieving homogeneous 3D FA across all respiration states.
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