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MRI Forum
'Cryogen'
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Result: Searchterm 'Cryogen' found in 3 messages
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Wendy Malloran

Thu. 10 Feb.11,
20:06

[Reply (1 of 3) to:
'acceptable levels of cryoges'
started by: 'vasi red'
on Thu. 10 Feb.11]


 
  Category: 
Site Planning and Specifications

 
acceptable levels of cryoges
A quench is possible around a helium level of 40%. An acceptable cryogen level should be above 50% if you don't like risks.
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Patricia Burns

Fri. 24 Oct.08,
19:20

[Reply (3 of 5) to:
'Mobile MRI - Keeping Magnet Cold'
started by: 'Will B'
on Thu. 23 Oct.08]


 
  Category: 
Devices, Scanner, Machines

 
Mobile MRI - Keeping Magnet Cold
The chillers can be off during transport. For short trips, the boil off of cryogens will be minimal.
 
 

p.burns
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Patricia Burns

Fri. 24 Oct.08,
13:17

[Reply (1 of 5) to:
'Mobile MRI - Keeping Magnet Cold'
started by: 'Will B'
on Thu. 23 Oct.08]


 
  Category: 
Devices, Scanner, Machines

 
Mobile MRI - Keeping Magnet Cold
Will,
When a mobile MRI Scanner is in motion going from site to site a "ramp down" is performed before moving.This is when the magnetic field is lowered but not completely shut off. The field still keeps it's integrity due to the Cryogens that surround it. When it comes to the new site, a "ramp up" is performed to bring the magnetic strength back up to par. Bottom line...The Cryogens are not boiled off and keep the magnet cold when it is motion. If the magnet were to suddenly lose it's power, it could be due to a cryogen boil off.
 
 

p.burns
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