Multi-Objective Optimization Framework for Landmark Measurement Error Correction in Three Dimensional Cephalometric Tomography

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dc.contributor.authorLagravère, Manuel O.
dc.contributor.authorCarey, Jason P.
dc.contributor.authorDeCesare, Alessandro
dc.contributor.authorSecanell, Marc
dc.date.accessioned2025-05-01T12:23:22Z
dc.date.available2025-05-01T12:23:22Z
dc.date.issued2013
dc.descriptionThe purpose of this study is to minimize errors that occur when using a four vs six landmark superimpositioning method in the cranial base to define the co-ordinate system. Cone beam CT volumetric data from ten patients were used for this study. Co-ordinate system transformations were performed. A co-ordinate system was constructed using two planes defined by four anatomical landmarks located by an orthodontist. A second co-ordinate system was constructed using four anatomical landmarks that are corrected using a numerical optimization algorithm for any landmark location operator error using information from six landmarks. The optimization algorithm minimizes the relative distance and angle between the known fixed points in the two images to find the correction. Measurement errors and co-ordinates in all axes were obtained for each co-ordinate system. Significant improvement is observed after using the landmark correction algorithm to position the final co-ordinate system. The errors found in a previous study are significantly reduced. Errors found were between 1 mm and 2 mm. When analysing real patient data, it was found that the 6-point correction algorithm reduced errors between images and increased intrapoint reliability. A novel method of optimizing the overlay of three-dimensional images using a 6-point correction algorithm was introduced and examined. This method demonstrated greater reliability and reproducibility than the previous 4-point correction algorithm.
dc.identifier.doihttps://doi.org/10.7939/R3BR8MV83
dc.language.isoen
dc.relationhttp://dx.doi.org/10.1259/dmfr.20130035
dc.relation.isversionofDeCesare, A., Secanell, M., Lagravère, M., and Carey, J. (2013). Multi-Objective Optimization Framework for Landmark Measurement Error Correction in Three Dimensional Cephalometric Tomography. Dentomaxillofacial Radiology, 42(7), 20130035 (10 pages).
dc.rights© 2013 Alessandro DeCesare et al. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
dc.subjectCone Beam Computed Tomography
dc.subjectMaxillary Expansion Treatment
dc.subjectLandmark Optimization Procedure
dc.subjectOrthodontics
dc.titleMulti-Objective Optimization Framework for Landmark Measurement Error Correction in Three Dimensional Cephalometric Tomography
dc.typehttp://purl.org/coar/resource_type/c_6501 http://purl.org/coar/version/c_970fb48d4fbd8a85
ual.jupiterAccesshttp://terms.library.ualberta.ca/public

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