Comparison of digital volume tomography and high-resolution computed tomography in detecting superior semicircular canal dehiscence – a temporal bone study. (September 2015)

• Record Type: Journal Article
• Authors: Bremke, Martin; Luers, Jan-Christoffer; Anagiotos, Andreas; Gostian, Antoniu-Oreste; Dorn, Franziska; Kabbasch, Christoph; Unkel, Claus; Höllering, Jens; Beutner, Dirk
• Is Part Of: Acta oto-laryngologica. Volume 135:Number 9(2015)
• Page Start: 901
• Page End: 906
• Publication Date: 2015-09
• Subjects: Otolaryngology -- Periodicals; Ear -- Diseases -- Periodicals; Throat -- Diseases -- Periodicals; Otolaryngology -- Electronic Resources; Otorhinolaryngologic Diseases; 617.8
• DOI: 10.3109/00016489.2015.1042041
• Languages: English
• ISSNs: 0001-6489

Abstract

<abstract> <title>Abstract</title> <p> <italic>Conclusion:</italic> In detecting a thin bony coverage of a superior semicircular canal (SSC), digital volume tomography (DVT) scans in Poeschl projection seem to be superior to high-resolution computed tomography (CT) scans. Still, a definite diagnosis of SSC dehiscence (SSCD) is not possible with any radiologic imaging technique. <italic>Objective:</italic> To compare CT and DVT to find out whether DVT is equal, better or worse in showing a thin bony layer on top of an SCC. <italic>Methods:</italic> In 11 human temporal bone specimens, the SSC was microscopically blue-lined leaving a thin bony coverage on top of it. All specimens were assessed with both high-resolution CT and DVT. After reconstructing the images in Stenvers and Poeschl projections, all images were evaluated by five independent examiners experienced in radiologic imaging of the temporal bone using a four-point ordinal scale, from 1 (distinct dehiscence) to 4 (distinct coverage). <italic>Results:</italic> The mean score for all CT scans was 2.58 compared with 3.22 for DVT scans (<italic>p</italic> = 0.000). Poeschl projection showed a mean score of 3.25 compared with 2.55 for Stenvers projection (<italic>p</italic> = 0.000). The best imaging modality was found to be DVT scans in Poeschl projections, with a mean score of 3.60.</p> </abstract>