Comput Methods Programs Biomed - Jaw tissues segmentation in dental 3D CT images using fuzzy-connectedness and morphological processing.

Tópicos

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Resumo

The success of oral surgery is subject to accurate advanced planning. In order to properly plan for dental surgery or a suitable implant placement, it is necessary an accurate segmentation of the jaw tissues: the teeth, the cortical bone, the trabecular core and over all, the inferior alveolar nerve. This manuscript presents a new automatic method that is based on fuzzy connectedness object extraction and mathematical morphology processing. The method uses computed tomography data to extract different views of the jaw: a pseudo-orthopantomographic view to estimate the path of the nerve and cross-sectional views to segment the jaw tissues. The method has been tested in a groundtruth set consisting of more than 9000 cross-sections from 20 different patients and has been evaluated using four similarity indicators (the Jaccard index, Dice's coefficient, point-to-point and point-to-curve distances), achieving promising results in all of them (0.726?0.031, 0.840?0.019, 0.144?0.023 mm and 0.163?0.025 mm, respectively). The method has proven to be significantly automated and accurate, with errors around 5% (of the diameter of the nerve), and is easily integrable in current dental planning systems.

Resumo Limpo

success oral surgeri subject accur advanc plan order proper plan dental surgeri suitabl implant placement necessari accur segment jaw tissu teeth cortic bone trabecular core inferior alveolar nerv manuscript present new automat method base fuzzi connected object extract mathemat morpholog process method use comput tomographi data extract differ view jaw pseudoorthopantomograph view estim path nerv crosssect view segment jaw tissu method test groundtruth set consist crosssect differ patient evalu use four similar indic jaccard index dice coeffici pointtopoint pointtocurv distanc achiev promis result mm mm respect method proven signific autom accur error around diamet nerv easili integr current dental plan system

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