Figure 10
3D-HARP. (a) Two series of tagged images are acquired: 1) a stack of parallel short-axis grid tagged images to obtain in-plane x-y displacements; and 2) a radial set of long-axis line-tagged images to obtain through-plane (in the z-direction) displacements. (b) The HARP concept is used to track myocardium. The intersection of tag line with the image plane (point P1) is linked to the nearest point on the next frame with the same characteristic phase (point P2).