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- From: weisberg@ee.rochester.edu (Jeff Weisberg)
- Newsgroups: sci.electronics
- Subject: Re: Nuclear Magnetic Resonance (NMR/MRI)
- Keywords: Think Snow!
- Message-ID: <1992Dec17.172120.19717@ee.rochester.edu>
- Date: 17 Dec 92 17:21:20 GMT
- References: <BzDI7y.53I@cantua.canterbury.ac.nz>
- Organization: Univ of Rochester, College of Engineering and Applied Science
- Lines: 22
-
- In article <BzDI7y.53I@cantua.canterbury.ac.nz> geoffrey@cosc.canterbury.ac.nz (Geoff Thomas) writes:
- /*
- /* I am wondering whether an NMR machine could be run 'inside-out'. As
- /* far as I understand them, NMR imagers consist of a toroidal magnet
- /* system, through which the subject is placed. Would it be possible to
- /* use a bar magnet type of configuration so that the subject didn't
- /* need to be placed within the physical magnet structure?
- /* [ascii graphic deleted]
- /*
- /* Can it be done? What range would the system typically be capable
- /* of measuring? How big would it be? How much power would be required?
- /*
- /* Any help much appreciated. Thanks in advance,
- /* Geoff Thomas
-
- From what I understand about MRI, your object must be within a
- uniform field. The cylindrical magnet produces an extremely
- uniform field. A bar magnet produces a non-uniform field, and thus
- would need be awful large to produce a field which is sufficintly
- uniform over the region containing the object.
-
- -jeff
-