POSTER SECTIONS Coverpage Learning objectives Background Findings and procedure details Conclusion Personal information and conflict of interest References

ECR 2022 / C-10728

Cochlear implant. What the radiologist must to know?

Congress:

ECR 2022

Poster Number:

C-10728

Type:

Educational Exhibit

Keywords:

Ear / Nose / Throat, CT, Computer Applications-Detection, diagnosis, Education, Education and training

Authors:

B. C. Zaragoza, O. D. GARCIA

DOI:

10.26044/ecr2022/C-10728

DOI-Link:

https://dx.doi.org/10.26044/ecr2022/C-10728

References

Amy F. Juliano, ‘Cross-Sectional Imaging of the Ear and Temporal Bone, Head and Neck Pathology, 12.3 (2018), 302 <https://doi.org/10.1007/S12105-018-0901-Y>.
Joshi VM and others, ‘CT and MR Imaging of the Inner Ear and Brain in Children with Congenital Sensorineural Hearing Loss’, Radiographics : A Review Publication of the Radiological Society of North America, Inc, 32.3 (2012), 683–98 <https://doi.org/10.1148/RG.323115073>.
Gerlig Widmann and others, ‘Pre- and Post-Operative Imaging of Cochlear Implants: A Pictorial Review’, Insights into Imaging (2020) <https://doi.org/10.1186/s13244-020-00902-6>.
Thomas Lenarz, ‘Cochlear Implant – State of the Art’, GMS Current Topics in Otorhinolaryngology, Head and Neck Surgery, 16 (2017), <https://doi.org/10.3205/CTO000143>.
Alexiades et al, “Method to estimate the complete and two-turn cochlear duct length”. Otol Neurotol (2015), 36:904–907, <DOI: 1097/MAO.0000000000000620>
Benson et al, “The forgotten second window: A pictorial review of round window pathologies”, American Journal of Neuroradiology, 2019, <DOI:3174/ajnr.A6356>

Fig 1: A. HRCT axial plane at the level of the external auditory canal shows a normal...

Fig 2: A. HRCT axial plane at the level of a normal right mastoid, which shows: 1....

Fig 3: Anatomic structures at the level of the middle ear: 1. Prussak space 2. Tegmen...

Fig 4: Anatomic structures at the level of the middle ear. A. Axial HRCT that shows...

Fig 5: Axial HRCT at the level of the pyramidal eminence (1) separates two recesses:...

Fig 6: Anatomic structures of the inner ear: A and B. HRCT of the right ear in a...

Fig 7: Findings seen at the level of the internal auditory canal: A. HRCT of the right...

Fig 8: Course intratemporal of the facial nerve: (1) Labyrinthine, (2) geniculate, (3)...

Fig 9: Anatomic structures that are necessary to calculate basal turn diameter: A....

Fig 10: The formula proposed by Alexiades et al, to calculate the cochlear duct length.

Fig 11: High-Resolution Computed Tomography Protocol.

Fig 12: Stenvers plane is a slice along the long axis of the temporal bone; to achieve...

Fig 13: The Poschl plane is a slice along the short axis of the temporal bone.

Fig 14: A. Retroauricular incision. B. Creation of a periosteal pouch in occipital...

Fig 15: D. Partial mastoidectomy with exposure of the posterior wall of the auditory...

Fig 16: G. Insertion of the electrode inside the round window. H. HRCT with a...

Fig 17: Two axial HRCT of different patients show normal findings post cochlear...

Fig 18: 3D Reconstruction that shows the electrode entering by the mastoidectomy.

Fig 19: Two HRCT of different patients in a Stenvers plane shows normal findings post...

Fig 20: Regular electrode. A. HRCT in a Stenvers plane shows the distance from the...

Fig 21: A graphic diagram that represents the position of the split electrode (A), and...

Fig 22: A graphic diagram that represents unfavorable positions, like over-insertion...

Fig 23: A graphic diagram that represents an unfavorable position: Electrode pinching.

Fig 24: HRCT post-implant in a Stenvers plane that shows electrode pinching.

Fig 25: A graphic diagram that represents unfavorable position: Tip fold over.