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Measuring the cochlea: comparison between otoplan and curved multiplanar reconstruction and literature review
Sushovit Sharma Luitel1, Manu Malhotra1, Madhu Priya1
1Department of Otorhinolaryngology, All India Institute of Medical Sciences, Rishikesh, India.
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.
