2012/1/23 Michael Harms <[log in to unmask]>

Hi Harold,
I don't think that there is any way for you to distinguish between the
possibility of sequential vs. interleaved acquisitions simply based on
the ordering of the voxel coordinates. (Because interleaved
acquisitions get un-interleaved in terms of the slice ordering when the
DICOMs are written). So, you'll need to look in the DICOM fields
themselves to know whether the acquisition was interleaved or
sequential.

cheers,
-MH

On Mon, 2012-01-23 at 17:52 +0100, Harold Mouras wrote:
> Thank you very much for these quick and kind responses !
> When moving the crosshair from the bottom to the upper side of the
> brain for example on the saggital plan, this third coordinate goes
> from 0 to 28 (we hade 28 slices). So, simply, we acquired sequentially
> from the bottom to the upper part of the brain, am I right....?
>
>
> 2012/1/23 John Ashburner <[log in to unmask]>
> Just to add something to my previous response...
>
> You can see which is the first slice in an image via the
> Display
> button. You can identify the first slice by clicking on the
> corners
> of the volume and looking at the the voxel coordinates. The
> third
> value is the slice number of that point.
>
> Best regards,
> -John
>
> On 23 January 2012 16:09, Harold Mouras <harold.mouras@u-
> picardie.fr> wrote:
>
> > Dear SPM list,
> > I am beginning to work on data acquired in a new experiment.
> When looking at
> > DICOM data under osiriX for example, data appeared to have
> been acquired
> > sequentially from the bottom of the brain. A very first
> question would be
> > how to be sure of this parameter when looking at the DICOM
> header ?
> > Moreover, I wondered if the conversion to nifti could have
> an influence on
> > this in order to plan the slice timing parameters I'll apply
> in my
> > preprocessing steps. Once the conversion is done, is there
> any information
> > regarding this parameter in the nifti file header ?
> > Thank you so much in advance,
> > Best regards,
> > Harold
> >
> >
> > --
> > Harold Mouras
> > Maître de Conférences en Neuroscience
> > Editeur "Socioaffective Neuroscience & Psychology"
> >
> >
> -------------------------------------------------------------------------
> > Laboratoire de Neurosciences Fonctionnelles et Pathologies
> > Faculté de médecine
> > 3, rue des Louvels
> > 80036 Amiens, France
> > Téléphone: +33 9 50 48 30 10
> > [log in to unmask]
> > In french: Website personnal page / Lab page (Amiens) / Lab
> page (Lille)
> > In english: Website personnal page / Lab page (Amiens) / Lab
> page (Lille)
> >
> -------------------------------------------------------------------------
> >
>
>
>
>
>
> --
> Harold Mouras
> Maître de Conférences en Neuroscience
> Editeur "Socioaffective Neuroscience & Psychology"
>
> -------------------------------------------------------------------------
> Laboratoire de Neurosciences Fonctionnelles et Pathologies
> Faculté de médecine
> 3, rue des Louvels
> 80036 Amiens, France
> Téléphone: +33 9 50 48 30 10
> [log in to unmask]
> In french:Website personnal page / Lab page (Amiens) / Lab page
> (Lille)
> In english: Website personnal page / Lab page (Amiens) / Lab page
> (Lille)
> -------------------------------------------------------------------------
>
>