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Publications (2)0.69 Total impact

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    ABSTRACT: The purpose of this study was to present a new innovative three-dimensional (3-D) cephalometric method. Part I deals with the set-up and validation of a voxel-based semi-automatic 3-D cephalometric reference system. The CT data (DICOM 3.0 files) of 20 control patients with normal skeletal relationships were used for this study. To investigate accuracy and reliability of the 3-D cephalometric reference system (Maxilimtrade mark, version 1.3.0) a total of 42 (14 horizontal, 14 vertical and 14 transversal) orthogonal measurements were performed on each patient twice by each of two investigators. The intra-observer measurement error was less then 0.88 mm, 0.76 mm and 0.84 mm for horizontal, vertical and transversal orthogonal measurements, respectively. The inter-observer measurement error was less as 0.78 mm, 0.86 mm and 1.26 mm for horizontal, vertical and transversal orthogonal measurements, respectively. Squared correlation coefficients showed a high intra-observer and inter-observer reliability. The presented 3-D cephalometric reference system proved to be accurate and reliable and can therefore be used for 3-D cephalometric hard and soft tissue analysis.
    Journal of Craniofacial Surgery 04/2006; 17(2):314-25. · 0.69 Impact Factor
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    ABSTRACT: Prediction of the facial outcome after maxillofacial surgery is not only of major interest for surgeons but also for patients. A mirror-like image of the expected surgical outcome gives important information for the patient and provides the surgeon with a good communication tool. This paper presents a method for registration of 3D photographs with 3D CT images, to provide the patient with a realistic view of the natural complexion of the simulated postoperative outcome of his/her face. A rigid ICP-based registration algorithm, followed by a non-rigid transformation produces a close match between the two surfaces.
    Medical Image Computing and Computer-Assisted Intervention - MICCAI 2001, 4th International Conference, Utrecht, The Netherlands, October 14-17, 2001, Proceedings; 01/2001