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Measuring the cochlea: comparison between otoplan and curved multiplanar reconstruction and literature review

Published online by Cambridge University Press:  06 August 2025

Sushovit Sharma Luitel ,
Manu Malhotra Open the ORCID record for Manu Malhotra [Opens in a new window] ,
Madhu Priya ,
Abhishek Bhardwaj Open the ORCID record for Abhishek Bhardwaj [Opens in a new window] ,
Sailaja Timmaraju ,
Pankaj Sharma ,
Shriya Bhattarai  and
Shreya Mishra
Sushovit Sharma Luitel
Affiliation:
Department of Otorhinolaryngology, All India Institute of Medical Sciences, Rishikesh, India
Manu Malhotra*
Affiliation:
Department of Otorhinolaryngology, All India Institute of Medical Sciences, Rishikesh, India
Madhu Priya
Affiliation:
Department of Otorhinolaryngology, All India Institute of Medical Sciences, Rishikesh, India
Abhishek Bhardwaj
Affiliation:
Department of Otorhinolaryngology, All India Institute of Medical Sciences, Rishikesh, India
Sailaja Timmaraju
Affiliation:
Education & Training, Med-EL India Pvt Ltd, New Delhi, India
Pankaj Sharma
Affiliation:
Department of Radiodiagnosis, All India Institute of Medical Sciences, Rishikesh, India
Shriya Bhattarai
Affiliation:
Department of Otorhinolaryngology, All India Institute of Medical Sciences, Rishikesh, India
Shreya Mishra
Affiliation:
Department of Ophthalmology, All India Institute of Medical Sciences, Rishikesh, India
*
Corresponding author: Manu Malhotra; Email: manumalhotrallrm@gmail.com
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Abstract

Objectives

To compare two high-resolution computerised tomography based pre-surgical planning software in measuring the cochlear dimensions, which can aid in designing/choosing customised cochlear implant electrodes.

Methods

A cross-sectional-observational study was conducted in a tertiary care centre using high-resolution computerised tomography–supported software Otoplan and curved multi-planar reconstruction to find cochlear duct length’s maximum and minimum width/diameter and height in 110 ears (55 subjects). Measurements and the time taken by both techniques were compared.

Results

There were no significant differences in the measurements taken with the two software; however, the time taken for analysis was significantly higher for curved multi-planar reconstruction than with Otoplan.

Conclusion

The steep learning curve, the need for an expert radiologist and the difficulty of use are factors that significantly limit the use of curved multi-planar reconstruction. Otoplan requires less time and can be operated even by someone with less expertise in measuring cochlear dimensions for pre-surgical planning and research.

Keywords

cochleacochlear implantscomputer-assisted image processingtomographyX-ray computed

Information

Type
Review Article
Information
The Journal of Laryngology & Otology , Volume 139 , Issue 10 , October 2025 , pp. 891 - 896
Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of J.L.O. (1984) LIMITED.

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Footnotes

Manu Malhotra takes responsibility for the integrity of the content of the paper.

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