Magnetic Resonance Imaging (MRI) is one of the key technologies used in the Hos[tials . MRI allows medical professionals to collect important information about their patient’s condition without exposing them to radiation.
MRI Scanners use Liquid Helium (He) to cool the superconducting magnet, which is the part of the MRI Scanner that generates high-resolution images of the human body.
Liquid Helium is used due to its extreme low temperatures ( minus 268 degrees centigrade ) which are required for Superconducting magnets to operate.
However Helium is an inert Gas and as such if it were to leak in to the MRI room it would remove the Oxygen from the Atmosphere and could cause death via asphyxiation.
Oxygen detection is therefore a requirement to protect workers and patients in case of the leak.
Oxygen Detection installed in an MRI does have restrictions.
This represents some challanges for installers.
One good solution is to use a sample draw monitor such as the Riken Keiki Model GD-70D intelligent sample draw monitor.
The GD-70D can be mounted outside the MRI and a Teflon sampling hose run into the room to a ceiling location to sample the Oxygen levels in the room.
This arrangement offers two specific advantages:
The GD-70D is highly reliable and robust with many 100's of thousands installed worldwide, used in many applications including MRI scanner rooms, and give many years of trouble free service.
See GD-70D for more details.
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Disclaimer : Information given in this article is for general guidance only, and is based on experience and is not intended to replace advise from professional gas sensor location experts and/or gas mapping services, that can provide accurate bespoke design.
For more information about positioning fixed gas detectors, further guidance can be found in the new Gas Mapping Standard BS 60080 (Fire and Gas Mapping ), IEC 60079-29-2 (Explosive atmospheres – Part 29-2: Gas detectors – Selection, installation, use and maintenance of detectors for flammable gases and oxygen), and also EN 45544-4 (Workplace atmospheres – Electrical apparatus used for the direct detection and direct concentration measurement of toxic gases and vapours. Guide for selection, installation, use and maintenance.). Additionally, The CoGDEM ( Council of Gas Detection and Enviromental Monitoring ) Guide to Gas Detection is an excellent general user guide for Gas Detection, written by those in the industry.View Story
Catalytic combustion sensors are the standard method for detecting combustible gases including Hydrogen, however in order to operate a minimum of about 10% Oxygen needs to be present. IR sensors are a good solution to this problem for measuring most combustible gases in an inert environment where O2 levels are below 10% volume but IR sensors cannot detect Hydrogen.
Riken Keiki offers several solutions around this problem.View Story