Surgical reconstruction of orbital defects
Diagnosis of orbital defects is typically performed with CT or DVT (Cone beam CT). The planning of a surgical treatment of orbital fractures or dismorphisms is based on 2D-slices of a CT data acquisition, where dislocations of bony structures in general are clearly visible. However, the surgical reconstruction of a fractured orbita is difficult and often demands for computer assisted 3D reconstruction and planning methods. An automatic 3D reconstruction of thin orbita walls from tomographic data is unreliable due to the so called partial volume effects. Thus, a tedious manual segmentation of such structures is currently required.
The goal of the Orbita project is to provide reliable and fast segmentation methods for a 3D reconstruction of the human orbita from CT data. Therefore, anatomic knowledge is to be used, that will be extracted from a series of CT data sets of non-pathologic orbita structures, and provided by means of a statistical 3D shape model of the human orbita. This 3D shape model (Orbita Atlas) is intended to be used for automatic segmentation as well as a template for surgical reconstruction.
Further information is available in the detailed project description.
AO Foundation - Development Institute, Davos, Schweiz (Priv.-Doz. Dr. Hansrudi Noser, Dr.Dr. Lukas Kamer)
cfc Hirslanden, Cranio Facial Center, Aarau, Schweiz (Prof. Dr. Dr. med. Beat Hammer)
A. Wittmers was funded by the AO Foundation
11/01/2005 - 10/31/2006