Figure 4:

Evaluations of DC bias on the phantom with FT-VSI prepared ASL (post labeling delay = 0 ms) at B₁⁺ scale of 0.8, 1.0, and 1.2 with (a) scheme 2 using velocity-compensated control and (b) scheme 3 using dynamic phase-cycling. Normalized subtracted signal from each dynamic label/control pairs are shown along with their averages. For scheme 3, although each dynamic generated strong false signal, they were mostly canceled after averaging.