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Cryogens

Terms in this set (13)

What zone is the quench vent pipe when it enters the ceiling?
zone 3
zone 2
zone 1
zone 4
zone 3
A device used to keep helium in a liquid state by keeping the hollow tubes inside thermally insulated is known as
Cryopins
Cryogen
Bobbins
Cryostat
Cryostat
Identify the hazards of a failed quench when the helium leaks into the MRI room.
Frostbite
Ear drum rupture
Hypothermia
Asthma attack
Frostbite
Ear drum rupture
Hypothermia
Asthma attack
A sudden loss of magnet superconductivity is known as:

MRI does not ever have a loss of magnet superconductivity
Hydrogen Boil-off
Quench
Helium Boil-off
Quench
The process of energizing an MRI solenoid to create an electromagnetic force is called:

Sloping
Dampening
Ramping
Camping
Ramping
What element is the main source used in cryogens?
Carbon dioxide
Oxygen
Nitrogen
Helium
Helium
Recondenses the helium gas to liquid to prevent it from burning off entirely.
Cold Head
Responsible for circulating the helium through the magnet. Should it fail, the magnet starts to lose liquid and the ability to keep the magnets cool.
Compressor
This component is responsible for monitoring the temperature.
Chiller Temperature
This component is responsible for circulating the chiller unit to the heat exchanger on the cold head.
Chill water flow
When a quench occurs, it may take up to 30 seconds before a technologist knows a quench is occurring. (T/F)
T
What happens to liquid helium if it reaches room temperature?

It will change to a solid state
Nothing will happen
It will change to the element hydrogen.
It will change to a gaseous state
It will change to a gaseous state
Identify the standard refrigeration system used in modern MRI scanners that reduces the need for helium refills as frequently.
Cold Head
Compressor
Zero Boil Off (ZBO)
Chiller
Zero Boil Off (ZBO)
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