We investigate a new approach to assess ventricular shunt function using phase-contrast magnetic resonance imaging (PC MRI). A flow phantom was constructed to assess CSF flows between 0-24 ml/hour. The PC MRI sequence showed strong flow correlation (R2 = .9671) even for flow velocities below 1 cm/s. The lowest non-zero CSF flow we measured was 1 ml/hour (0.02 cm/s), 67% lower than previously reported shunt flow measurements. The sequence was tested in a human subject after phantom calibration. With a 96 second duration, PC SHUNT shows promise as a practical means for determining shunt failure clinically.
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