Shielding Enclosure (Faraday Cage)
An area (box, room, or building) specifically designed to attenuate electromagnetic radiation, or
electromagnetic radiation and acoustical emanations, originating either inside or outside the
area.
Shielding Effectiveness (SE)
A measure of the reduction or attenuation in the electromagnetic field strength at a point in
space caused by the insertion of a shield between the source and that point.
Primary Ground
All RF Shield components (walls, floor, ceiling, etc) must be electrically bonded together to form
one common ground plane which is connected to the Facility Grounding Conductor
Secondary Ground
Other grounds that connect the outside of the RF Shield room to earth grounds are called
secondary grounds
5.3 Customer Responsibilities
The Customer is responsible for:
1. The selection of a quality RF shielded room vendor who understands the RF shielding room
purpose described in
.
2. Contracting with a RF shielded room vendor to design and install (including installation of
dock anchor) the RF shielded room to meet requirements in
3. Maintenance and repair of RF shielded room, to include, but not limited to, shielding
effectiveness (SE), door threshold and door seal, pressure equalization vent operation for
the life of the MR System.
NOTE:
•
On request, the GE Healthcare Project Manager of Installation (PMI) can supply a
list of RF shielding room vendors.
•
The RF shielded room may not be in a temperature or humidity controlled
environment, the customer must take local measures to prevent RF shield
effectiveness degradation.
•
Special care should be used when installing all fixtures penetrating the RF shield
(e.g., vents, electrical conduit, penetration panels, etc.) to ensure the integrity of
the RF shielded room is maintained.
SIGNA Voyager Pre-Installation
Direction 5680008–1EN, Revision 2
Chapter 3 Magnet Room
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