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FSL  December 2007

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Subject:

Re: Using Siemens Trio field maps in FUGUE

From:

Matt Glasser <[log in to unmask]>

Reply-To:

FSL - FMRIB's Software Library <[log in to unmask]>

Date:

Wed, 19 Dec 2007 13:06:25 -0500

Content-Type:

text/plain

Parts/Attachments:

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text/plain (63 lines)

We know about that, but what about saving the phase at the same time?  This
is what we were having difficulty with.

-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf
Of Daniel Schwartz
Sent: Wednesday, December 19, 2007 12:50 PM
To: [log in to unmask]
Subject: Re: [FSL] Using Siemens Trio field maps in FUGUE

Getting the Siemens 3T Trio to save the magnitude images is a checkbox
in the protocol... just flip through the tabs until you see a "save
magnitude images" box. It will give you two volumes of magnitude images,
one for each TE, although I'm not exactly sure that fugue needs these
mag images at all. At least, that's what it does on our Trio. Does
anybody have any good ideas about what the UNITS are on these phase
field maps (3T Trio)?

-Daniel

Daniel Schwartz, CIC
Functional Brain Imaging Lab
Oregon Health & Sciences University
3181 SW Sam Jackson Pk. Rd.
Portland, OR 97239
(503) 494-6494
>>> [log in to unmask] 12/19/07 9:39 AM >>>
Which field map protocol is it?  We have been having some difficulty
getting
the phase and magnitude saved with the standard sequence.

Thanks,

Matt.

-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On
Behalf
Of Kent Conover
Sent: Wednesday, December 19, 2007 12:34 PM
To: [log in to unmask]
Subject: [FSL] Using Siemens Trio field maps in FUGUE

Hi,

I am writing to request help with using Siemens Trio field map in FUGUE.
There is a Siemens filed mapping protocol that provides two image files.
The
first looks like a field map image, while the second looks like a
magnitude
image. However, when I submit these files to FUGUE via the MELODIC gui
the
results are strange, (It appears as if the brain is on fire!).

I am encouraged by a report that something very similar has been done
(see:
http://users.fmrib.ox.ac.uk/~kylep/kyles_papers/abstracts/ismrm_def_abstract
_submitted.pdf).

I would be grateful for any insights!

-Kent Conover

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