reproducibility and accuracy of PC-MRI for low velocity measurement: A pilot study.

Motivation: Non-invasive measurement of intracranial flow can elucidate fluid interactions within the brain. However, it's essential to determine the range of velocities that can be reliably measured using this approach. Goal(s): Our aim is to assess the ability of PC MRI "Flow Compensated Fast low angle Shot (fcFLASH)" based sequence for velocity measurements in small blood vessels and cerebrospinal fluid in rats. Approach: A phantom is built to simulate fluid flow. Measurements are repeated for each velocity range. Results: Non gated fcFLASH-based PC MRI allows a rough estimation of flow velocities on the order of 0.5 cm/s. Impact: our study shows that the fcFLASH-based PC MRI can be used for a rough estimation of a small fluid circulation. A methodological development is necessary for a reliable measurement.