Recently developed 2D phase-contrast sequences showed the feasibility of measuring the small lenticulostriate arteries with 7T MRI. However, these vessels are known to be tortuous, and their tortuosity generally increases with aging and in vascular disease. Therefore, we aimed to measure the blood flow velocity not only in one direction, but in three directions, to capture all three velocity components. We found significant components for the other two, less conventional, velocity directions, which resulted in a lower pulsatility index and peak acceleration when comparing to the 1D measurements.
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