RF Shielding (Faraday Cage)
Required for MRI installs to prevent external radiofrequency from entering the magnet room. Materials: copper mesh or galvanized-steel panels. Typical attenuation: 100 dB at relevant frequencies.
Failure modes
- Door gasket wear → RF leak → image artifacts
- Penetration panels (cables + pipes) → same
- Physical damage from construction → must be retested
Annual RF leakage survey is part of MRI PM.