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Example of wave intensity analysis methodology from a patient, showing positioning of the slice for flow assessment (A) and modulus (B) and phase (C) images of the phase-contrast acquisition. Aortic velocity (D) and area (E) are semiautomatically extracted and combined for wave speed calculation (F) and wave intensity analysis (G): c, wave speed; A, area; U, aortic velocity; FCW, forward compression wave (early systole); FEW, forward expansion wave (end systole).
