RE: DeGaussing an MRI suite

[Richard_M_Pierson@RL.gov]

You may look into the naval engineering applications, specifically
submarine detection and/or the prevention of.  Large scale applications
obviously, but another avenue to explore for additional information.
Some submariners maybe able to elaborate.  I also have heard of similar
instances developing in large whole body counting shields but never
strong enough to affect counting system electronics.  HOPE IT HELPS.


-----Original Message-----
From:	John Moulder [SMTP:jmoulder@its.mcw.edu]
Sent:	Tuesday, January 26, 1999 3:14 PM
To:	Multiple recipients of list
Subject:	DeGaussing an MRI suite

Has anyone has any experience in dealing with the residual static
magnetic 
fields that remain in an MRI suite after a unit is removed?

The residual fields can reach 2 mT.  This is too low to be a real health

concern, but it's enough to cause problems for electronics and its
enough to 
upset people.

Degaussing is theoretically possible, but I can't find anyone who has
actually 
done it.


John Moulder (jmoulder@its.mcw.edu)

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