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The CaliberMRI UNITY phantom (a) outside and (b) inside the scanner. The phantom includes 3 sets of T1, T2, and ADC mimics arranged in parallel trays within the phantom (c) that provide differing contrast on T1 and T2-weighted and quantitative images (d). In addition, the phantom includes a spatial resolution grid, and internal and external temperature strips (a). A positioning cradle allows the phantom to be unambiguously positioned in the scanner (b).
