These data provide low flip angle spoiled gradient echo images to measure the sensitivities of transmit and receiver arrays at 7T MRI. Both synthetic and measured data are included for both the heart and brain. The data were generated and measured to evaluate algorithms for reconstructing under-sampled parallel transmit maps. These algorithms are described in the journal article with title "Accelerated calibrationless parallel transmit mapping using joint transmit and receive low-rank tensor ... Expand documentation