7T 2D Qflow is capable of measuring blood flow velocity in the superficial perforating arteries. These arteries run though the semi oval center of the white matter in the brain and have diameters smaller than 200 µm. Due to the small diameters, partial volume effects of perforators with surrounding tissue cause velocity underestimation. With simulations and experiments we show that tilt optimized nonsaturated excitation (TONE) significantly increases SNR and decreases velocity underestimation in superficial perforating arteries.
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