Symmetric and Transitive Registration of Image Sequences
Figure 2
The recovered myocardial deformation for a normal subject over the
cardiac cycle (first row: end diastole; third row: end systole) is shown by
means of the endocardial and endocardial surface model contours overlaid over a
midventricular short-axis MRI slice. The myocardium was segmented in the first
frame (shown in the first row), a surface model was generated around the
segmented myocardium and the recovered deformation for the rest of the sequence
was applied to the surface model. The two red contours represent a
cross-section through the surface model. The four columns correspond to (a)
sequential recovery by , (b) sequential recovery by , (c) reference-based recovery by , and (d) reference-based recovery by . The registration algorithms and and the
difference between sequential and reference-based recovery are explained in
Section 3.2. Note that the best deformation recovery,
that is, the best agreement of the red contours and the edges of the left
ventricular wall, was achieved for the reference-based recovery by , shown in column (c).
