R_Bibb_Medical_Modelling_The_Application_of_Adv.pdf
R_Bibb_Medical_Modelling_The_Application_of_Adv.pdf
R_Bibb_Medical_Modelling_The_Application_of_Adv.pdf
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Case studies 259<br />
6.103 <strong>The</strong> stages <strong>of</strong> facial reconstruction on the Nesperennub<br />
stereolithography model.<br />
<strong>The</strong> Nesperennub CT data also showed a number <strong>of</strong> other articles <strong>of</strong><br />
interest that had been wrapped up with the mummy. <strong>The</strong>se included objects<br />
found in some other mummies <strong>of</strong> the period, a snake amulet on the forehead<br />
and artifi cial eyes in the sockets. Uniquely Nesperennub also appeared<br />
to have a bowl on top <strong>of</strong> his head (see Fig. 6.104). <strong>The</strong> British Museum was<br />
very keen to have replicas <strong>of</strong> these objects for use in the exhibition.<br />
Mimics was used to segment the data describing these objects so that they<br />
could be made using RP techniques. <strong>The</strong> artifi cial eyes and snake amulet<br />
appeared to have high densities and were, therefore, relatively easy to<br />
threshold and segment from their surroundings. However, the bowl proved<br />
more diffi cult as the density was quite high but similar to bone and in close<br />
contact with the head in some areas. <strong>The</strong>refore, the bowl was segmented<br />
using the same approach used for the skulls. <strong>The</strong> bowl was <strong>of</strong> particular<br />
interest as it had never been seen in a mummy before and nobody was quite<br />
sure what its function was.<br />
<strong>The</strong> STL+ module <strong>of</strong> Mimics was used to generate STL fi les <strong>of</strong> the objects<br />
that were made by RP. <strong>The</strong> snake amulet and eyes were made using stereolithography<br />
and the bowl was made using LOM TM (see Fig. 6.105). <strong>The</strong><br />
model <strong>of</strong> the bowl was used to help museum staff to identify the object and<br />
speculate as to how it came to be in the mummy’s wrappings. Handling and<br />
inspecting the bowl led them to the conclusion that it was a simple unfi red<br />
clay bowl that was probably used to hold the resin used in the mummifi cation<br />
process. It had probably become glued to Nesperennub’s head by<br />
accident during the mummifi cation process and was simply covered up to<br />
hide the mistake. <strong>The</strong> bowl model was also used in a fi lm reconstructing<br />
the mummifi cation process, which is shown as part <strong>of</strong> the exhibition. <strong>The</strong><br />
amulet, eyes and bowl are now on display in the exhibition.
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