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An imaging scoring method was proposed to identify FCD based on ultra-high-resolution CT.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Forty patients (21 females and 19 males, mean age 44.3 \u00b1 17.4 years), whose tympanic facial canal (FC) was examined during otological surgery, were divided into the FCD group (<jats:italic>n<\/jats:italic>= 29) and the control group (<jats:italic>n<\/jats:italic>= 11) based on surgical findings. Imaging appearance of tympanic FC was scored 0\u20133: 0 = no evident bony covering, 1 = discontinuous bony covering with linear deficiency, 2 = discontinuous bony covering with dotted deficiency, and 3 = continuous bony covering. Both lateral and inferior walls were assigned a score as L<jats:sub>FCD<\/jats:sub>and I<jats:sub>FCD<\/jats:sub>, respectively. An FCD score was calculated as L<jats:sub>FCD<\/jats:sub>+ I<jats:sub>FCD.<\/jats:sub>The diagnostic value of the FCD score was tested using the ROC curve.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The inter-observer agreement was moderate for the lateral wall (Cohen\u2019s \u03ba coefficient 0.416, 95% CI 0.193\u20130.639), and good for the inferior wall (Cohen\u2019s \u03ba coefficient 0.702, 95% CI 0.516\u20130.888). In the FCD group, the most common appearance for both walls was discontinuous bony covering with linear deficiency (L<jats:sub>FCD<\/jats:sub>= 1, 22\/29, 75.9%; I<jats:sub>FCD<\/jats:sub>= 1, 15\/29, 51.7%). An FCD score of less than 4 was associated with high sensitivity (0.82) and specificity (0.93) for identifying FCD, with an AUC of 0.928.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Using the proposed scoring method, FCD score &lt; 4 could identify FCD of the tympanic segment with high concordance with surgical findings.<\/jats:p><\/jats:sec><jats:sec><jats:title>Key Points<\/jats:title><jats:p><jats:italic>\u2022 Imaging appearance of the tympanic facial canal (FC) is divided into four types based on ultra-high-resolution CT images.<\/jats:italic><\/jats:p><jats:p><jats:italic>\u2022 The most common appearance of FC with facial canal dehiscence (FCD) is discontinuous bony covering with linear deficiency.<\/jats:italic><\/jats:p><jats:p><jats:italic>\u2022 An FCD score, consisting of scores of the lateral and inferior walls, less than 4 is highly indicative of FCD.<\/jats:italic><\/jats:p><\/jats:sec>","DOI":"10.1007\/s00330-022-09231-2","type":"journal-article","created":{"date-parts":[[2022,11,15]],"date-time":"2022-11-15T03:03:07Z","timestamp":1668481387000},"page":"2830-2839","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["A novel imaging scoring method for identifying facial canal dehiscence: an ultra-high-resolution CT study"],"prefix":"10.1007","volume":"33","author":[{"given":"Ruowei","family":"Tang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhengyu","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pengfei","family":"Zhao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lei","family":"Zhao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ning","family":"Xu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hongxia","family":"Yin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhenghan","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8190-6469","authenticated-orcid":false,"given":"Zhenchang","family":"Wang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,11,15]]},"reference":[{"key":"9231_CR1","doi-asserted-by":"publisher","first-page":"679708","DOI":"10.1155\/2012\/679708","volume":"2012","author":"S Yetiser","year":"2012","unstructured":"Yetiser S (2012) The dehiscent facial nerve canal. 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