Biomedical Engineering Reference
In-Depth Information
Figure 19.
The top row shows a clipped view of an FE mesh generated from volumetric
images of a healthy human subject. Surfaces of the ventricles (cyan) and tumor (red) are
added. The left image illustrates the mesh at the beginning of the simulation, and the right
image illustrates the mesh at termination. The bottom two rows provide transaxial (middle
row) and coronal (bottom row) 2D slices of the volumetric images at the beginning of the
simulation (left) and at termination (right). One-time remeshing was used halfway through
application of pressure
P
. The middle column shows images from a simulation in which
remeshing was not used. This simulation terminated before reaching the final value of
P
.
See attached CD for color version.
the tumor is elastically constrained by the stresses in the surrounding brain tissue,
the final tumor shape is not perfectly spherical. For the simulation in Figure 19,
the initial mesh had 50,865 elements, with a minimum quality of 0.0235. Before
remeshing, 1837 tetrahedra had
q
T
≤
0
.
02. After remeshing, 3 elements had
q
T
≤
0
.
02, with a minimum quality of
q
T
≈
0
.
02. This, however, did not prevent
completion of the simulation.
