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High-resolution 3D gradient echo (GRE) MRI at 4.7 T. a) 3D MRI of flowing HP propane gas (~20 mM concentration) with 0.5×0.5×0.5 mm3 spatial and 17.7 s temporal resolution and 32×32×32 mm3 field of view. b) The corresponding image of (stationary) thermally polarized tap water (55 M). Reprinted with permission from Kovtunov, K. V.; et al. J. Phys. Chem. C 2014, 118, 28234.[222]
