RE: Magnetic Field interference

["Beasley, Charles W." <CWBeasley@sprg.smhs.com>]

About 17 years ago the hospital I was working at got their first MRI
scanner.  We placed a mobile gamma camera that had 37 PMTs at varying
distances from the magnet.  I cannot recall at what distance we noticed
nonuniformities occur.  I can tell you that Siemens Medical does not
recommend cameras within magnetic fringe fields of 0.05mT.

Charles Beasley 

> ----------
> From: 	Salladay John L PORT[SMTP:SalladayJL@mail.ports.navy.mil]
> Reply To: 	radsafe@romulus.ehs.uiuc.edu
> Sent: 	Monday, November 08, 1999 12:48
> To: 	Multiple recipients of list
> Subject: 	Magnetic Field interference
> 
> RADSAFERS,
> 
> Has anyone run across interference on PMT's that was due to magnetic
> fields?
> If so,  I would appreciate any information you could forward to me.  
> 
> Thanks in Advance  
> 
> 
> 
> John L. Salladay, CHP
> jlsalladay@mail.ports.navy.mil
> 
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