Biomedical Engineering Reference
In-Depth Information
Figure 17.
Illustration of steps in the operation of the 3D deformable model based segmen-
tation algorithm: (a) 3D TRUS image with 5 of the 6 user-selected control points shown
as white spheres; (b) initial mesh; (c) deformed mesh. Reprinted with permission from the
AAPM.
oriented along the
x
,
y
, and
z
axes of the 3D image. The value of
x
0
is the average
of the
x
coordinates of the two control points with extreme
x
values. Similarly,
y
0
and
z
0
are estimated by averaging the two control points with extreme
y
and
z
