Phonak B90 User Manual page 19

Special medical or dental
examination including
radiation described below,
may adversely affect the
correct functioning of your
hearing aids. Remove and
keep them outside the
examination room/area
before undergoing:
Medical or dental
examination with X-ray
(also CT scan).
Medical examinations with
MRI/NMRI scans, generating
magnetic fields.
Hearing aids don't need to
be removed when passing
security gates (airports
etc.). If X-ray is used at all,
it will be in very low doses,
and will not affect the
hearing aids.
36
Do not use your hearing
aid in areas where
electronic equipment
is prohibited.