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Dental arch definition in computed tomographs using two semi-automatic methods

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Abstract

Computed tomography is a widely used image examination in dental imaging that provides an accurate location of oral structures and features, including the dental arch, which is an important anatomical feature. This study proposes two new semi-automatic methods for arch definition in CTs, with minimal user effort. This study includes 25 CT examinations. The first method is based on the teeth pulps, and the second one is based on the whole mandible. The methods use thresholding and morphological operations to obtain the arches. The evaluation process includes two different metrics DTW and IoU. For both metrics, the initial results of M1 were very low, but the average performance of M2 can be considered high. The analysis showed that changing the input improves the M1 results substantially. The promising results presented here suggest that these methods can be used as auxiliary tools for the proposed task.

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  1. https://scikit-image.org/docs/stable/api/skimage.morphology.html

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Acknowdgements

This work is supported by the Health Department of the State of Rio de Janeiro. A.C. is partially supported by MACC-INCT, CNPq Brazilian Agency (402,988/2016–7 and 305,416/2018–9) and FAPERJ (project SIADE-2). We would like to thank the Professional Master’s program in Health, Laboratory Medicine and Forensic Technology at UERJ.

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Authors and Affiliations

  1. Núcleo de Radiologia Odontológica, Policlinica Piquet Carneiro, Universidade do Estado do Rio de Janeiro, Avenida Marechal Rondon, 381, Rio de Janeiro, RJ, 20950-003, Brazil

    Larissa Aparecida Vaz Oliveira, Maira Beatriz Hernandez Moran, Marcelo Daniel Brito Faria & Luciana Freitas Bastos

  2. Instituto de Computação, Universidade Federal Fluminense, Av. Gal. Milton Tavares de Souza, s/n, Niterói, RJ, 24210-346, Brazil

    Maira Beatriz Hernandez Moran & Aura Conci

  3. Faculdade de Odontologia, Universidade Federal do Rio de Janeiro, Av. Pedro Calmon, 550, Rio de Janeiro, RJ, 21941-617, Brazil

    Marcelo Daniel Brito Faria

  4. Laboratório Nacional de Computação Científica, Av. Getulio Vargas, 333, Petrópolis, RJ, 25651-076, Brazil

    Gilson Giraldi

  5. Instituto de Radioproteção E Dosimetria, Comissão Nacional de Energia Nuclear, Rio de Janeiro, Brazil

    Luiz Antonio Ribeiro da Rosa

  6. Faculdade de Ciências Médicas, Universidade Do Estado Do Rio de Janeiro, Avenida Marechal Rondon, 381, Rio de Janeiro, RJ, 20950-003, Brazil

    José Firmino Nogueira Neto

Authors
  1. Larissa Aparecida Vaz Oliveira
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Correspondence to Maira Beatriz Hernandez Moran.

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Oliveira, L.A.V., Moran, M.B.H., Faria, M.D.B. et al. Dental arch definition in computed tomographs using two semi-automatic methods. Med Biol Eng Comput 60, 3499–3508 (2022). https://doi.org/10.1007/s11517-022-02684-z

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  • DOI: https://doi.org/10.1007/s11517-022-02684-z

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