Description
Gabriel BUCIU, Dragoș-Laurențiu POPA, Aurelian UDRISTIOIU, Michi GEAMBESA, Nicolae Adrian DINA, Alina DUȚĂ, Daniela Doina VINTILĂ, Daniel Cosmin CĂLIN
In order for a simulation to be close to the reality of the behavior of a human system, sets of images obtained by computed tomography were used. These sets of images contain the information necessary for the threedimensional reconstruction of the analyzed models. Using different techniques, which are based on the transformation of shades of gray from the tomographic images, it is possible to obtain primary geometries of the components and tissues contained in the so-called “cloud of points”. This computer format is specific to reverse engineering, more precisely, to three-dimensional scanning. The primary geometry thus obtained is then processed in specific programs, since they may contain artifacts (elements that do not belong to the real model), self-intersecting surfaces or other non-conforming components that cannot be transformed into virtual solids. These transformation stages have the final goal of obtaining perfectly closed surfaces. Only such geometries can be transformed into virtual solids using a CAD program. Also in this software, using techniques and methods specific to direct engineering, implant or prosthetic elements can be added. Complete models are transferred to a program that allows their analysis using the finite element method. In this software, the specific materials are attached, constraints are indicated, mechanical loads or thermal or other flows are defined. Finally, the applications are run and the result maps that compose the behavior of the analyzed system are obtained. Based on them, conclusions can be drawn and decisions of a medical nature can be made.
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