R_Bibb_Medical_Modelling_The_Application_of_Adv.pdf

258 Medical modelling
Once we were satisfi ed that we had a good segmentation of the skull, the
data was prepared for model building using stereolithography. The RP Slice
module of Mimics was used to generate SLC fi les of the skulls. The RP
Slice module was then also used to create the necessary supports, also in
the SLC format. This direct interface to a layer format suitable for stereolithography
results in smaller fi le sizes whilst retaining excellent detail and
accuracy. In addition, the single support fi le generated proves simpler to
process and subsequently easier to remove from the model when compared
with alternative formats. The skull models produced provided Caroline
Wilkinson at the Unit of Art in Medicine at Manchester with a sound basis
for the facial reconstructions as shown in Figs 6.102 and 6.103 (12).
With the Nesperennub case, the STL+ module of Mimics was also used
to export the skull data as an STL fi le. The availability of a high quality
STL fi le enabled Caroline to attempt a digital facial reconstruction using a
sophisticated virtual sculpture system (13).
6.102 ‘Jeni’ stereolithography model.