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a, b Overview of the blood pump with control panel and inflow and outflow tubes. c, d The plastic tub filled with carbopol gel containing the tissue tube could be rotated. The red arrow indicates a goniometer. c Orthogonal orientation. d 45° rotation. e Schematic showing 2D flow measurements with the phantom vessel positioned along the z-direction of the MRI scanner (0°) and with an altered angle (45°). f Schematic changes of the cross-sectional area and shape
