Wimmer, WilhelmWilhelmWimmer0000-0001-5392-2074Venail, FredericFredericVenailWilliamson, TomTomWilliamsonAkkari, MohamedMohamedAkkariGerber, NicolasNicolasGerber0000-0003-0308-699XWeber, StefanStefanWeberCaversaccio, MarcoMarcoCaversaccioUziel, AlainAlainUzielBell, BrettBrettBell2024-10-232024-10-232014-07-02https://boris-portal.unibe.ch/handle/20.500.12422/128999A major component of minimally invasive cochlear implantation is atraumatic scala tympani (ST) placement of the electrode array. This work reports on a semiautomatic planning paradigm that uses anatomical landmarks and cochlear surface models for cochleostomy target and insertion trajectory computation. The method was validated in a human whole head cadaver model (n = 10 ears). Cochleostomy targets were generated from an automated script and used for consecutive planning of a direct cochlear access (DCA) drill trajectory from the mastoid surface to the inner ear. An image-guided robotic system was used to perform both, DCA and cochleostomy drilling. Nine of 10 implanted specimens showed complete ST placement. One case of scala vestibuli insertion occurred due to a registration/drilling error of 0.79 mm. The presented approach indicates that a safe cochleostomy target and insertion trajectory can be planned using conventional clinical imaging modalities, which lack sufficient resolution to identify the basilar membrane.en600 - Technology::610 - Medicine & healtharticle10.7892/boris.627582510128910.1155/2014/596498