Information Technology Reference
In-Depth Information
Fig. 14 An example of the initial labeling. a Original CT images. b Detection of the VB region
and re
nement. c The cropped VB region. d The initial labeling, f
using only the intensity and
spatial interaction models. e The
final segmentation using three models
other slices. This approach gives deformation
flexibility between each slices which
stocks in z-axis. The transformation has 4 parameters such as s
x
, s
y
(for scale, S), and
t
x
, t
y
(for translation, Tr). It should be noted that the rotation is not necessary in the
method since the registration is done slice by slice; and the VB does not show
important rotational variation in the axial axes. Let us de
fl
ne the transformation
result by
b
that is obtained by applying a transformation T to a given contour/surface
