Shielding Effectiveness Testing & Earth Isolation Measurement Testing

Post installation, and prior to the MRI scanner installation, EEP are able to carry out Shielding Effectiveness (SE) Testing and Earth Isolation Measurement Testing on the constructed Shielded Room.

 


An MRI scanner operates by picking up incredibly small electrical signals emitted from the patient whilst they are being scanned. These signals are then processed into the images we are all familiar with. Any external electrical interference picked up by the scanner can unfortunately distort or ruin the images. To prevent this from happening the scanner is placed inside a copper or aluminium Faraday Cage / Shielded Room designed to reduce external interference from entering the scanner.

All scanner suppliers have detailed requirements for the Faraday Cages performance and frequency range of operation. The performance is called SHIELDING EFFECTIVENESS and specifies how much any external signals must be reduced by.

Post installation, and prior to the MRI scanner installation, EEP are able to carry out Shielding Effectiveness Testing (SE) on the constructed Faraday Cage. The end results will determine whether or not the room meets the standards required by the scanner manufacturer.

At the same stage the shielded room can also be checked for electrical isolation from the host building. This is to again ensure potential interference from the host building cannot affect the MRI scanner during operation. Earth Isolation Measurement Testing is carried out strictly in accordance to the scanner manufacturers specifications.

Our highly experienced test engineers are externally assessed at regular intervals and carry out shielding effectiveness testing using calibrated transmitters and receivers to accurately define the signal reduced at specific frequencies. All tests are carried out to predetermined international standards to ensure conformity across the industry, and test equipment is calibrated using independent test houses.

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