Influence of Ionizing Radiation on Two Generations of Cochlear Implants

Figure 2

(a) Left: cross section of the Digisonic SP cochlear implant. ① Silicone overmolding. ② Ceramic, thickness 1.2 mm. ③ Samarium cobalt magnet, 1.5 mm. ④ Titanium base, 0.4 mm. ⑤ Electronic board: epoxy resin FR-4, 0.4 mm. (b) Right: cross section of the Neuro cochlear implant. ① Silicone overmolding, min. thickness 0.4 mm. ② Ceramic, 1.25 mm: Zircon. ③ Titanium cover, 0.25 mm. ④ Magnet, 3 mm. ⑤ Electronic board and components.

(a)

(b)