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.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.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).The mean score for all CT scans was 2.58 compared with 3.22 for DVT scans (p = 0.000). Poeschl projection showed a mean score of 3.25 compared with 2.55 for Stenvers projection (p = 0.000). The best imaging modality was found to be DVT scans in Poeschl projections, with a mean score of 3.60.

作者：Martin, Bremke；Jan-Christoffer, Luers；Andreas, Anagiotos；Antoniu-Oreste, Gostian；Franziska, Dorn；Christoph, Kabbasch；Claus, Unkel；Jens, H?llering；Dirk, Beutner

来源：Acta oto-laryngologica 2015 年 135卷 9期