Hi Bas,
Thanks a lot for your response.
Unfortunately, the sequence we used at first is poor.
What about scanning 10 subjects with the previous and the new sequences (during activation and rest conditions) and checking for differences?
Best,
Sandra.
Le Vendredi 20 Juillet 2012 12:54 CEST, "Neggers, S.F.W." <[log in to unmask]> a écrit:
> Hi Sandra,
>
> this of course will highly depend on the differences in your sequence, hard to tell otherwise. But why dont you simply use the same sequence in the first place? That would be optimal. Mostly, results from different sequences are hard to compare quantitatively, especially for fMRI, IMHO.
>
> Good luck,
>
> Bas
>
>
> --------------------------------------------------
> Dr. S.F.W. Neggers
> Division of Brain Research
> Rudolf Magnus Institute for Neuroscience
> Utrecht University Medical Center
>
> Visiting : Heidelberglaan 100, 3584 CX Utrecht
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> --------------------------------------------------
>
> ________________________________________
> From: SPM (Statistical Parametric Mapping) [[log in to unmask]] on behalf of Sandra Chanraud [[log in to unmask]]
> Sent: Friday, July 20, 2012 12:20 PM
> To: [log in to unmask]
> Subject: [SPM] Longitudinal resting state study
>
> Dear all,
>
> We are planning to scan people who already had a MRI protocol about 2 years ago. The functional sequence that we will be using is different from the previous one, so that we wonder about the validity of comparing data from the 2 different scans.
>
> Any advise?
>
> Thanks in advance.
>
> Best,
> Sandra.
>
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