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Display of a placental volume using 4DVIEW. Quadrants A, B, and C correspond to the 3 orthogonal planes. Successive tracings in plane A are rendered using VOCAL into a 3-dimensional placental volume depicted in the lower right quadrant (3D). The placenta diameter (blue) and chorionic diameter (yellow) were measured in both A and B planes before and after a 45° rotation around the y-axis.
