Evaluation of the Normal Cochlear Second Interscalar Ridge Angle and Depth on 3D T2-Weighted Images: A Tool for the Diagnosis of Scala Communis and Incomplete Partition Type II

Abstract

A measured angle of >114° and a depth of the second interscalar ridge notch of ≤0.31 mm suggest the diagnosis of incomplete partition type II malformation and scala communis. These measurements can be accurately made by novice readers.

Variations in the Size and Shape of Human Cochlear Malformation Types

“…As a result, supporting preplanning tool like OtoPlan (http://www.otoplan.ch) is now European Confirmity marked and is in clinical application (Lovato and de Folippis ) assisting clinicians in measuring the cochlear size and choosing the cochlear implant (CI) electrode accordingly. Though abnormal anatomy cochleae were studied enough with the help of 2D radiographic images (Sennaroglu and Saatci ; Sun et al ; Sennaroğlu and Bajin ), only limited number of reports (Hara et al ; Liu et al ; Booth et al ) are available bringing most of the widely recognized malformation types especially in three‐dimensional (3D) format in knowing the variation in its size and shape.…”