MRI Rooms Overview
MRI systems operate receiving very weak signals.
The radio frequency environment in a hospital is rather polluted due to the application of a wide variety of electronic equipment.
Environmental shielding attenuation is required to ensure a MRI system operates correctly, under all circumstances.
The required shielding effectiveness for various MRI systems is about 90dB.
The better the shielding effectiveness of the shielded room, the better the results of the MRI scan.
Such a shielded room is also known as "Cage of Faraday".
Comtest takes advantage of a modular system to build a shielded room.
The panels are prepared using folded non-ferro material.
It provide an attenuation of over 100dB at a frequency of 100MHz.
The non-ferro panels are mounted using bolts and nuts.
In between conducting gasket is mounted to ensure good galvanic contact between the panels.
The screened room is a self-supporting construction, which makes further finishing simple.
In case required it can be built electrical isolated from the environmental construction.
Construction of the door
The door for the MRI chamber is available both as a swing and a sliding door. Highly conductive finger stock material is used to ensure an RF-tight enclosure.
The door for an MRI system chamber is usually a sliding door in order to be able to create an entrance without threshold. A threshold-less entrance is an important issue for patient movements. Automatic movement of the door is a preferred method using electric systems.
Finishing of the chamber is easy because of the self supporting construction with plaster panels, which can be painted or wall-papered. Sufficient space between shielding panels and finishing is available to allow installation of sound suppressing materials, without damaging the shield.
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