The accuracy of MR flow velocity measurement has been compromised due to a phase offset induced from the eddy current of gradient pulses. An automated correction method of the phase offset had been developed using an image-based algorithm. In order to validate the correction method and the measured velocity accuracy, we developed a flow phantom with a constant flow cross-section and used a servo motor controlled actuator to move the flow phantom accurately. The controlled movement of the new flow phantom allowed us to validate the phase offset correction method and the accuracy of the MR velocity measurement.
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