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In-vivo 3D cardiac vector flow imaging — A comparison between ultrasound and phase-contrast MRI

Phase-Contrast MRI (PC-MRI) is capable of 4D flow imaging and considered a gold standard for blood velocity measurements, but is currently cumbersome and time consuming. Ultrasound is bedside applicable, but is typically limited to a 1D velocity measurement. In this work we measure 3D blood flow velocity fields using high frame rate 3D ultrasound blood speckle tracking (BST) without contrast and compare to PC-MRI in a healthy volunteer.