When tested under scan conditions defined above, the HiRes Ultra 3D cochlear implant produced a maximum temperature rise of <3˚C after 15 minutes of continuous scanning.
Note: During the scan, patients might perceive auditory sensations. Adequate counseling of the patient is advised prior to performing the MRI. The likelihood and intensity of the auditory sensations can be reduced by selecting sequences with a lower Specific Absorption Rate (SAR) and slower gradient slew rates.
In MRI testing, the measured range of device image artifact radius extending from the HiRes Ultra 3D cochlear implant for spin and gradient echo sequences and all imaging planes are as follows (refer to Tables A-B):