Rebecca Susan Dewey, Robert A Dineen, Matthew Clemence, Nitin Menon, Richard Bowtell, Patrick Boyle, Douglas E H Hartley
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Images were compared to a control condition without a CI present. and CI users were imaged with similar sequences.</p><p><strong>Main outcome measures: </strong>In normally hearing controls, the likely impact of the artifact on detection of pathology for multiple neuroradiological locations as rated by two independent radiologists. In CI users, a qualitative assessment of the diagnostic usability of images.</p><p><strong>Results: </strong>Visibility of the ipsilateral IAC and cochlea varied among the three CI users, with images from one participant deemed largely usable, while those from the other two participants exhibited less diagnostic certainty, likely due to differences in implant locations and cranial/neuroanatomical variations. Ratings of images in normally hearing participants showed that more middle-to-anterior CI locations were associated with reduced likelihood of overlooking gross abnormalities.</p><p><strong>Conclusion: </strong>Through meticulous surgical placement, bilateral IAC visualization may be achievable for monitoring chronic health conditions such as tumor surveillance in high-risk patients, and as a safety monitoring outcome measure in clinical trials.</p>","PeriodicalId":19732,"journal":{"name":"Otology & Neurotology","volume":" ","pages":"e105-e108"},"PeriodicalIF":1.9000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11939083/pdf/","citationCount":"0","resultStr":"{\"title\":\"Magnetic Resonance Imaging of Inner Ear and Internal Auditory Canal Structures in the Presence of a Cochlear Implant.\",\"authors\":\"Rebecca Susan Dewey, Robert A Dineen, Matthew Clemence, Nitin Menon, Richard Bowtell, Patrick Boyle, Douglas E H Hartley\",\"doi\":\"10.1097/MAO.0000000000004445\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Objective: </strong>To determine whether the internal auditory canal (IAC) can be visualized using magnetic resonance imaging (MRI) in users of a cochlear implant (CI) model that can safely undergo MRI at 3 T.</p><p><strong>Patients: </strong>Four normally hearing controls and three individuals unilaterally implanted with a HiRes Ultra 3D (Advanced Bionics LLC, California, USA).</p><p><strong>Interventions: </strong>Participants underwent 3 T MRI using sequences appropriate for the postoperative surveillance of the IAC. 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引用次数: 0
摘要
目的:研究使用人工耳蜗(CI)模型的患者是否可以使用磁共振成像(MRI)显示内耳道(IAC),该模型可以在3 t时安全地进行MRI检查。患者:4名听力正常的对照组和3名单侧植入了HiRes Ultra 3D (Advanced Bionics LLC, California, USA)的个体。干预措施:参与者使用适合于IAC术后监测的序列进行3t MRI检查。在8个候选头皮位置(头部两侧各4个)放置一个功能齐全、无动力的CI后,在游泳帽下获得正常听力个体的图像。将图像与没有CI存在的对照条件进行比较。和CI用户的成像序列相似。主要结果测量:在听力正常的对照组中,由两名独立的放射科医生评定的伪影对多个神经放射部位病理检测的可能影响。在CI用户中,对图像诊断可用性的定性评估。结果:同侧IAC和耳蜗的可见性在三名CI使用者中有所不同,其中一名参与者的图像被认为大部分可用,而来自其他两名参与者的图像显示出较少的诊断确定性,可能是由于植入物位置和颅/神经解剖学变异的差异。听力正常的参与者的图像评分显示,更多的中前CI位置与忽略严重异常的可能性降低有关。结论:通过精心的手术放置,双侧IAC可视化可以用于监测高风险患者的慢性健康状况,如肿瘤监测,并可作为临床试验中安全监测结果的指标。
Magnetic Resonance Imaging of Inner Ear and Internal Auditory Canal Structures in the Presence of a Cochlear Implant.
Objective: To determine whether the internal auditory canal (IAC) can be visualized using magnetic resonance imaging (MRI) in users of a cochlear implant (CI) model that can safely undergo MRI at 3 T.
Patients: Four normally hearing controls and three individuals unilaterally implanted with a HiRes Ultra 3D (Advanced Bionics LLC, California, USA).
Interventions: Participants underwent 3 T MRI using sequences appropriate for the postoperative surveillance of the IAC. Images in normally hearing individuals were acquired after placing a fully functional, unpowered, CI underneath a swimming cap at each of eight candidate scalp positions, four on each side of the head. Images were compared to a control condition without a CI present. and CI users were imaged with similar sequences.
Main outcome measures: In normally hearing controls, the likely impact of the artifact on detection of pathology for multiple neuroradiological locations as rated by two independent radiologists. In CI users, a qualitative assessment of the diagnostic usability of images.
Results: Visibility of the ipsilateral IAC and cochlea varied among the three CI users, with images from one participant deemed largely usable, while those from the other two participants exhibited less diagnostic certainty, likely due to differences in implant locations and cranial/neuroanatomical variations. Ratings of images in normally hearing participants showed that more middle-to-anterior CI locations were associated with reduced likelihood of overlooking gross abnormalities.
Conclusion: Through meticulous surgical placement, bilateral IAC visualization may be achievable for monitoring chronic health conditions such as tumor surveillance in high-risk patients, and as a safety monitoring outcome measure in clinical trials.
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.