An assembly for shielding an implanted medical device from the effects of
high-frequency radiation and for emitting magnetic resonance signals
during magnetic resonance imaging. The assembly includes an implanted
medical device and a magnetic shield comprised of nanomagnetic material
disposed between the medical device and the high-frequency radiation. In
one embodiment, the magnetic resonance signals are detected by a receiver,
which is thus able to locate the implanted medical device within a
biological organism.