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Representative hyperpolarized EPSI data from one rat at 0, 5, 10, and 15 minutes. 3×6 grids of 1 cm3 voxels from a slice containing the kidneys are shown. Data acquisition started 25 seconds after the start of injection of hyperpolarized [1-13C]pyruvate and lasted 12.5 seconds. Minimal temporal changes were detected over the 15 minutes of the 4 hyperpolarized injections.
