FIG. 4.

Parallel tagged images. Three sets of cine images are acquired to obtain three-dimensional displacement data throughout the heart: two sets in the short axis with mutually perpendicular tags, and a third set oriented radially about the long axis with tags parallel to the short axis. A: Early systolic time frame from one image plane of each set (long-axis image to the right). B: Ten consecutive images from a basal short-axis plane demonstrate tag motions during systole. The right ventricle is to the upper left in each image.