Motion of the heart during contrast enhancement is modeled at two
hierarchical levels: global translation and local deformation.
Large-scale, i.e., global, translational motion is identified using
global template matching, while the local deformation of a portion of the
object (e.g., the left ventricle where the object is a heart) is obtained
using an adaptive local template matching scheme which adapts to the
local edge distributions by varying the height and the width of the
template as well as the location of the template followed by spatial
regularization. To address the difficulty of rapid intensity changes
across the image sequence as the contrast agent perfuse into the tissue,
an edge-based similarity measure is used for template matching.