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Practicable assessment of cochlear size and shape from clinical CT images

All Rights Reserved https://www.rioxx.net/licenses/all-rights-reserved ;DOI: 10.17863/CAM.55677

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  • Title:
    Practicable assessment of cochlear size and shape from clinical CT images
  • Author: Gee, Andrew H ; Zhao, Yufeng ; Treece, Graham M ; Bance, Manohar L
  • Subjects: Cochlea ; Cochlear Implantation ; Cochlear Implants ; Humans ; Organ Size ; Temporal Bone ; Tomography, X-Ray Computed
  • Description: There is considerable interpersonal variation in the size and shape of the human cochlea, with evident consequences for cochlear implantation. The ability to characterize a specific cochlea, from preoperative computed tomography (CT) images, would allow the clinician to personalize the choice of electrode, surgical approach and postoperative programming. In this study, we present a fast, practicable and freely available method for estimating cochlear size and shape from clinical CT. The approach taken is to fit a template surface to the CT data, using either a statistical shape model or a locally affine deformation (LAD). After fitting, we measure cochlear size, duct length and a novel measure of basal turn non-planarity, which we suggest might correlate with the risk of insertion trauma. Gold-standard measurements from a convenience sample of 18 micro-CT scans are compared with the same quantities estimated from low-resolution, noisy, pseudo-clinical data synthesized from the same micro-CT scans. The best results were obtained using the LAD method, with an expected error of 8-17% of the gold-standard sample range for non-planarity, cochlear size and duct length.
  • Publisher: Springer Science and Business Media LLC
  • Creation Date: 2021
  • Language: English
  • Identifier: DOI: 10.17863/CAM.55677
  • Source: Cambridge University Library IR DSpace@Cambridge
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