An Optimized Method for Anatomic Skull Prosthesis Modelling

CT slice retrieval by shape ellipses descriptors for skull repairing

“…The figure 3.b show the adjusted ellipses found after fitness evaluation using EAA. A detailed description and evaluation of this adjustment can be seen in [11], [14]. The same procedure is repeated to all remaining slices as well.…”

“…The same procedure is repeated to all remaining slices as well. As presented by [11] the prosthesis piece is defined when all virtual arcs are superimposed in 3D space. Now, in a different way, we use the ellipse parameter to find a similar slice from another patient stored in database.…”

“…We need to generate the geometric representation without enough information. The work of [11] suggested to use ellipses virtually created to build a new surface. Here, we are overtaking its approach by finding a similar shape retrieved from databases.…”

“…The prosthesis modelling from the 3D reconstructed image as in [9] and the bone modelling to rapid prototyping applications as in [10] illustrated that the geometric definition is still a complex task. An alternative method proposed by [11] is based on ellipse adjustment on CT (Computed Tomography) slices. In that case the ellipses adjusted in each defective slice define arcs that can be superimposed to create a CAD model of a 3D piece and respective data can be used in machining.…”

“…The proposal here is based on modified approach of the previous work of [11] that suggests the use of elliptical approximation to recover its shape's characteristics. We are assuming that the physics characteristics of skull shapes are similar among humans (equivalent ages and gender).…”