Biomedical Engineering Reference
In-Depth Information
FIGURE 15.18
A finite element intraoperative update based on gravity-induced shift during a clinical case:
overlay of undeformed and deformed finite element mesh boundaries for (a) axial and (b) sagittal
orientations. Preoperative orthogonal cross sections of the image volume are shown in (c) with
their intraoperatively updated counterpart presented in (d). Model predictions show an approx-
imate 6 mm shift of the lateral ventricle tip highlighted by the cursor cross-hairs in these images.
deformed by this and other OR inputs (e.g., cortical surface motion) in order to
create the volumetric update of the preoperative MR images as surgery
progresses.
To complete this illustration, an example of a clinical update of gravity-
induced deformation performed retrospectively to the actual surgery is
shown in Figure 15.18. These results are discussed more fully in references 27
and 47. They are important because they indicate how the finite element
