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Automated segmentation of the craniofacial skeleton with “Black Bone” MRI

Accepted version
Peer-reviewed

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Article

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Authors

Delso, Gaspar 

Abstract

3D imaging of the craniofacial skeleton is integral in managing a wide range of bony pathologies. We have previously demonstrated the potential of “Black Bone” MRI (BB) as a non-ionising alternative to CT. However, even in experienced hands 3D rendering of BB datasets can be challenging and time consuming. The objectives of this study were to develop and test a semi- and fully-automated segmentation algorithm for the craniofacial skeleton. Previously acquired adult volunteer (n=15) BB datasets of the head were utilised. Imaging was initially 3D rendered with our conventional manual technique. An algorithm to remove the outer soft-tissue envelope was developed and 3D rendering completed with the processed datasets (semi-automated). Finally, a fully automated 3D-rendering method was developed and applied to the datasets. All 3D rendering was completed with Fovia High Definition Volume Rendering® (Fovia Inc, Palo Alto, CA. USA). Analysis was undertaken of the 3D visual results and the time taken for data processing and interactive manipulation. The mean time for manual segmentation was 12.8 minutes, 3.1 minutes for the semi- automated algorithm, and 0 minutes for the fully automated algorithm. Further fine adjustment was undertaken to enhance the automated segmentation results, taking a mean time of 1.4 minutes. Automated segmentation demonstrates considerable potential, offering significant time saving in the production of 3D BB imaging in adult volunteers. We continue to undertake further development of our segmentation algorithms to permit adaption to the paediatric population in whom non-ionising imaging confers the most potential benefit.

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Journal Title

Journal of Craniofacial Surgery

Conference Name

Journal ISSN

1049-2275

Volume Title

Publisher

Wolters Kluwer Health

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All rights reserved
Sponsorship
Academy of Medical Sciences (Unknown)
cademy of Medical Sciences Clinical Lecturer Starter Grant (K. Eley) [SGL019\1012]