632498.fig.001a
(a)
632498.fig.001b
(b)
632498.fig.001c
(c)
Figure 1: (a) The initial shape of the ACM (green) with the corresponding landmarks (red dots). (b) A step of the deformation algorithm. (c) The landmarks of the shape being deformed overlaid on an image of tracheal stenosis. Note the landmarks being attracted by the edges of the structures in the image.