Dynamic Cone-Beam CT of the Middle Ear for Determining Excursion of the Ossicles: Technical Proof of Concept.

IF 1.9 3区 医学 Q3 CLINICAL NEUROLOGY
Otology & Neurotology Pub Date : 2025-04-01 Epub Date: 2025-02-04 DOI:10.1097/MAO.0000000000004422
Steven Arild Wuyts Andersen, Bilal Hussain Akram
{"title":"Dynamic Cone-Beam CT of the Middle Ear for Determining Excursion of the Ossicles: Technical Proof of Concept.","authors":"Steven Arild Wuyts Andersen, Bilal Hussain Akram","doi":"10.1097/MAO.0000000000004422","DOIUrl":null,"url":null,"abstract":"<p><strong>Objective: </strong>Conductive hearing loss can be caused by fixation or discontinuity of the ossicles. Current noninvasive methods such as tympanometry and conventional clinical imaging might indicate mobility and/or pathology but cannot quantify the excursion. The objective of this study is to measure the excursion of the malleus and incus using timed pressurization during clinical cone-beam CT (CBCT) of the middle ear.</p><p><strong>Patients: </strong>Five human cadaveric heads.</p><p><strong>Intervention: </strong>CBCT imaging obtained at an isotropic resolution of 0.08 mm of five cadaveric heads (10 ears). A tympanometer was used to pressurize the ear drum and change pressure during the scan.</p><p><strong>Main outcome measures: </strong>The excursion of the manubrium of malleus and the long process of incus was determined based on manual segmentation of the imaging series.</p><p><strong>Results: </strong>It was technically feasible to change pressure midways during scan and use 180° virtual reconstructions of the negative and positive pressure phase to quantify the mobility of the malleus and incus. In ears with normal impedance of the tympanic membrane (type A tympanogram), we found an average excursion of the manubrium of malleus of 0.61 mm and the long process of incus of 0.27 mm.</p><p><strong>Conclusion: </strong>Dynamic CBCT of the middle ear can be used to quantify the excursion of malleus and incus in ears with normal ear drum impedance. This might provide additional information compared with conventional static imaging at atmospheric pressure and other current in vivo methods such as wideband tympanometry. Further studies are needed to explore the clinical value of the method.</p>","PeriodicalId":19732,"journal":{"name":"Otology & Neurotology","volume":" ","pages":"e120-e124"},"PeriodicalIF":1.9000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Otology & Neurotology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1097/MAO.0000000000004422","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/2/4 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"CLINICAL NEUROLOGY","Score":null,"Total":0}
引用次数: 0

Abstract

Objective: Conductive hearing loss can be caused by fixation or discontinuity of the ossicles. Current noninvasive methods such as tympanometry and conventional clinical imaging might indicate mobility and/or pathology but cannot quantify the excursion. The objective of this study is to measure the excursion of the malleus and incus using timed pressurization during clinical cone-beam CT (CBCT) of the middle ear.

Patients: Five human cadaveric heads.

Intervention: CBCT imaging obtained at an isotropic resolution of 0.08 mm of five cadaveric heads (10 ears). A tympanometer was used to pressurize the ear drum and change pressure during the scan.

Main outcome measures: The excursion of the manubrium of malleus and the long process of incus was determined based on manual segmentation of the imaging series.

Results: It was technically feasible to change pressure midways during scan and use 180° virtual reconstructions of the negative and positive pressure phase to quantify the mobility of the malleus and incus. In ears with normal impedance of the tympanic membrane (type A tympanogram), we found an average excursion of the manubrium of malleus of 0.61 mm and the long process of incus of 0.27 mm.

Conclusion: Dynamic CBCT of the middle ear can be used to quantify the excursion of malleus and incus in ears with normal ear drum impedance. This might provide additional information compared with conventional static imaging at atmospheric pressure and other current in vivo methods such as wideband tympanometry. Further studies are needed to explore the clinical value of the method.

求助全文
约1分钟内获得全文 求助全文
来源期刊
Otology & Neurotology
Otology & Neurotology 医学-耳鼻喉科学
CiteScore
3.80
自引率
14.30%
发文量
509
审稿时长
3-6 weeks
期刊介绍: ​​​​​Otology & Neurotology publishes original articles relating to both clinical and basic science aspects of otology, neurotology, and cranial base surgery. As the foremost journal in its field, it has become the favored place for publishing the best of new science relating to the human ear and its diseases. The broadly international character of its contributing authors, editorial board, and readership provides the Journal its decidedly global perspective.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信