The Provox Vega Voice Prothesis, supplied by Atos Medical AB, are electrically nonconductive, nonmetallic and nonmagnetic and have therefore no potential for interaction with the MR-field. They are solely manufactured by plastic material and silicone rubber and therefore the device are considered to be MR-safe, as defined in ASTM F2503.
This safety information is the voices prothesis in three different diameters (17, 20 and 22.5Fr) and in six different lengths (4 6 8 10 12.5 15mm)