[Mristudio-users] Eddy_current_correction

[susumu mori]

When you load the REC file using "Mri3DView", make sure how many images are
in the file. For example, if you used Philips "High" table, you have 1 b0 +
32 DWI + 1 extra image, total 34 images. The last one is an
isotropically-weighted image generated from the DWIs. Then make sure your
gradient table. Most likely, the number of images in your REC and the
gradient table are not matching.

For example, you may have only 33 lines in the table. For the final image,
which you don't use, you can add an extra line with 33: 100, 100, 100. The
first "33" is the line number (34th table row), and "100, 100, 100" sends a
message to DtiStudio "don't use this image".



On Tue, Jun 29, 2010 at 6:19 AM, Seyede Ghazal Mohades <
Seyede.Ghazal.Mohades at vub.ac.be> wrote:

> >Dear all
> I have a completely basic question
> when I try to load Philips Rec images in DTI studio I can do it, however
> the same set file  (which is a DTI ss-EPI sequence )gives the following
> error when I try to do DTI mapping :
> the file is Bigger (and sometimes it says smaller)than a DWI sequence!
> where is the problem?
> regards
> Ghazal
> >Thanks
> >
> >-----Original Message-----
> >From: mristudio-users-bounces at mristudio.org on behalf of
> support at mristudio.org
> >Sent: Mon 6/28/2010 12:24 PM
> >To: DTI Studio, ROI Editor, DiffeoMap Questions/Support
> >Subject: Re: [Mristudio-users] Eddy_current_correction
> >
> >the 1st method would be fine: use the 1st B0 as a reference and register
> all
> >others with it.
> >
> >support
> >
> >
> >
> >>
> >> Hi All,
> >>
> >> We have diffusion data set acquired with 5 trails/repetitions(in single
> time
> >> point/cross sectional) for each and every subject. This means i have 5
> b0(same
> >> value) and DW (12 directions) data while doing eddy current correction
> can i
> >> choose for instance b0 from first trail and register all the DW and
> other b0
> >> images to this or do eddy current correction separately for each and
> every trail
> >> and finally register all of them together say for instance to the first
> trail.
> >>
> >> Thanks
> >>
> >> venkat
> >>
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> >Cleveland Clinic is ranked one of the top hospitals
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