AMMRL: Does magnet drift affect the room temperature Z1 shim?

From: Zhang, Weixing <Weixing.Zhang_at_STJUDE.ORG>
Date: Mon, 3 Jan 2011 17:33:36 -0600

Hello:



Our Active-shilded magnet has been drifting at 4.5 Hz/hour during the past 10 years.

The Z1 shim has been changing from about -20000 to about the limit value -32767.

Is the Z1 shim change related to the magnet drift?

Did you notice this kind of relation with your magnets?



Thanks,

Weixing Zhang

St. Jude Children's Research Hospital





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Received on Mon Jan 03 2011 - 13:32:41 MST