Медел вроде с самого начала позиионировал свои импланты, как MRI-safe, без удаления внутренней части Вот, тут нашла http://www.medel.com.ar/ENG/US/20_Products/10_Cochlear_Implants/999_mri_safe.aspCochlear implant users may require an MRI (Magnetic Resonance Imaging) scan at some point in their life, so MRI compatibility is an important consideration when selecting a cochlear implant. MED-EL cochlear implants offer MRI safety* without the need to surgically remove the internal magnet. At MED-EL, we recognize the importance of providing access to sophisticated medical diagnostics, including MRI, without any surgical intervention.No need for surgery to remove and replace the internal magnetNo incision or swelling to heal after an MRI scanNo recovery time to affect implant use or performanceNo significant impact on MRI image qualityNo limitations on daily activities following an MRI scanNo risk of magnet displacement* In the US, PULSARCI100 and SONATATI100 are currently approved for use at a scanner strength of 0.2 Tesla.