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Spiral images of a human brain at 7T for demonstrating evolution of signal dropout and image blurring (arrows) with TE increasing. Shorter TE produced smaller dropout and blurring. Acquisition parameters: whole-body 7T scanner, 8-channel head coil array, AWSOS sequence, sinc RF pulse of 2ms in duration and 1.5 in cycle, , TR=100ms, FOV=220mm, matrix size=256, slice thickness=2mm, and spirals=64 for a readout of 3.52ms.
