Figure 2

Pulse-sequence for the retrospective measurement of blood flow and the cross-sectional areas. The measurement is motion-compensated in all three encoding directions. Flow measurements are done with a bipolar gradient in slice direction, which is added to the slice-selection gradient. After gradient spoiling and slice selection tripolar gradients are applied in the logical X- and Y-direction with G _x =G·cos(θ) and G _y =G·sin(θ), where θ is the projection angle and G the maximum strength of the read-out gradient. The gradient echo is acquired at a position of 10% of the read-out duration.