Fig. 4.
Flow phantom study. Evolution of signal intensity through different flow rates on synthetic T1- (row a) and T2-weighted (row b) images in the axial plane. The same slice is displayed for each figure. The flowing solution enters the left segment of the tube and exits from the right segment. Row c shows the corresponding T1 maps. On T1-weighted images, the signal intensity first increases in both segments along with pulsation artifacts. Then above a certain flow rate, the signal starts to decrease.