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...Mr pulse sequences robert a pooley phd aapm washington dc august mfmer slide disclosure no conflicts of interest outline spin echo inversion recovery gradient planar k space trajectories uses and flip angles density contrast short te long tr t rephases effects from b inhomogeneity chemical shift magnetic susceptibility scan time x n nsa repetition p phase encodes signal averages nex excitations rf adc gslice gfreq gphase filling the is sampled values are placed in image ft single slice g...