Hi Chiara,
I recently run into a similar problem, and the solution I found was to
use the PickAtlas toolbox (http://www.fmri.wfubmc.edu/download.htm)
which allows you to mask a T-map with any mask of your choice. The only
difference with the masking performed by SPM is that you have to create
your own mask from the desired contrast beforehand (using the "save"
option and then the "ImCalc" function to thresold and binarize your
saved image; you will find more helpful details in this post:
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind04&L=SPM&P=R249758&D=0&I=-3&X=5562383E86C74C74).
Hope it helps. All the best
Guillaume
Nosarti, Chiara a écrit :
> Dear list
> My question was asked in 1998 and at the time Karl stated that the
> contrasts had to come from the same statistical model. Is this still the
> case ?
>
> Best wishes
> Chiara Nosarti
>
>
>
> Date: Tue, 22 Sep 1998 18:03:55 +0100
> Reply-To: [log in to unmask] (Karl Friston)
> Sender: spm
> From: [log in to unmask] (Karl Friston)
> Subject: Re: mask from another analysis? (was:Predicted Interval
> Analysis
>
> Dear Ruth,
>
>
>> Dear Karl,
>> May I ask a further question on the subject of masks. Does the
>>
> mask
>
>> have to come from a contrast created in the very same analysis? Or is
>> it possible to "export" a mask from one analysis and use it as a mask
>> with another set of scans? Is there a way to save a mask as a file
>>
> for
>
>> later use?
>>
>
> The contrasts have to come from the same statistical model (i.e.
> analysis). This is not a mathematical requirement but is required by
> the data reduction [to a point list] employed by SPM.
>
> All the best - Karl
>
>
--
Guillaume Sescousse, Doctorant
Institut des Sciences Cognitives
Centre de Neuroscience Cognitive
CNRS UMR5229 - UCB Lyon 1
67 Boulevard Pinel
69675 Bron Cedex
France
Tel: 33 (0)4 37 91 12 44
Fax : 33 (0)4 37 91 12 10
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