Dear Christophe,
You may need to check your spm defaults - the normalisation process could
be expecting data in radiological convention instead of neurological
(which would explain the left-right flip). Just see what's selected under
the defaults (spatial normalisation) button.
Emma
,---------------------------------------------------------------------.
| Emma Williams |
| MRI Physicist, Wolfson Brain Imaging Centre |
+----------------------------------------------------------------------+
| Wolfson Brain Imaging Centre |Email: [log in to unmask] |
| |Phone email: [log in to unmask] |
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`----------------------------------------------------------------------'
On Wed, 28 Jun 2000, Christophe GROVA wrote:
> Dear SPMers,
>
> I just want to ask you for some advice about a strange result I got after spatial normalization.
>
> First, I have made a converter from our own data file to spm-compatible Analyze file. To check it I tried to convert and to display a 3D T1 MRI presenting an easy identifiable anomaly on the right temporal lobe. Result was OK (the anomaly was on the left on the images in neuroradiological convention)
>
> Then I performed a spatial normalization with the T1 template on such data (I know this does not make sense but it was just to check). But I realized that the normalized data were Left-Right flipped. In fact the anomaly appeared now on the left temporal lobe (on the right on the images in neuroradiological convention).
>
> Can anyone give me an explanation of such Left-Right inversion ???
>
> Thanks in advance,
>
> Best Regards
>
> Christophe GROVA
>
> *************************************************
> Christophe GROVA
> Laboratoire SIM, faculte de Medecine,
> Université de Rennes 1
>
> tel : 02 99 33 68 63
> fax : 02 99 33 68 64
> e-mail : [log in to unmask]
> site : http://sim3.univ-rennes1.fr
> *************************************************
>
>
>
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