Automatic extraction of the mid-facial plane for cranio-maxillofacial surgery planning

De Momi, E; Chapuis, J; Pappas, I; Ferrigno, G; Hallermann, W; Schramm, A; Caversaccio, M (2006). Automatic extraction of the mid-facial plane for cranio-maxillofacial surgery planning. International journal of oral & maxillofacial surgery, 35(7), pp. 636-42. Maryland Heights, Mo.: Elsevier 10.1016/j.ijom.2006.01.028

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Recently developed computer applications provide tools for planning cranio-maxillofacial interventions based on 3-dimensional (3D) virtual models of the patient's skull obtained from computed-tomography (CT) scans. Precise knowledge of the location of the mid-facial plane is important for the assessment of deformities and for planning reconstructive procedures. In this work, a new method is presented to automatically compute the mid-facial plane on the basis of a surface model of the facial skeleton obtained from CT. The method matches homologous surface areas selected by the user on the left and right facial side using an iterative closest point optimization. The symmetry plane which best approximates this matching transformation is then computed. This new automatic method was evaluated in an experimental study. The study included experienced and inexperienced clinicians defining the symmetry plane by a selection of landmarks. This manual definition was systematically compared with the definition resulting from the new automatic method: Quality of the symmetry planes was evaluated by their ability to match homologous areas of the face. Results show that the new automatic method is reliable and leads to significantly higher accuracy than the manual method when performed by inexperienced clinicians. In addition, the method performs equally well in difficult trauma situations, where key landmarks are unreliable or absent.

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Craniomaxillofacial Surgery 04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Ear, Nose and Throat Disorders (ENT)
UniBE Contributor:	Hallermann, Wock Fritz, Caversaccio, Marco
ISSN:	0901-5027
ISBN:	16542822
Publisher:	Elsevier
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:46
Last Modified:	05 Dec 2022 14:14
Publisher DOI:	10.1016/j.ijom.2006.01.028
PubMed ID:	16542822
Web of Science ID:	000238845600011
URI:	https://boris.unibe.ch/id/eprint/18912 (FactScience: 1182)