Hi Charles,
> - Is there an other way to compute automatically the total ICV with the
> tissue volume procedure of SPM12 ?
There may be another elegant way, but you can compute ICV
automatically with the following (See the attached screenshot);
In the batch editor, after you specify SPM -> Util -> Tissue Volumes,
add "BasicIO -> Variable Input/Output -> Pass Output to Workspace"
Output Variable Name: e.g. ICV
Output Item: Here you click "Dependency" and select "Tissue Volumes: Sum"
Then run the batch and ICV will be saved in the variable name "ICV".
Hope this helps,
Kiyotaka
2015-05-28 21:35 GMT+09:00 charles laidi <[log in to unmask]>:
> Dear SPM users,
>
> I would like to estimate the total intracranial volume (TIV) with SPM12
> using the method recently described by Malone et al.
> (http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4265726/).
>
> I believe that my problem is quite simple but I didn't find an answer so
> far.
>
> I performed the segmentation using SPM12 segment procedure. I then used in
> the batch editor the Tissue Volume Util as it was suggested in the online
> documentation of SPM12.
> The input in the batch is the Segmentation mat file produced by the Segment
> procedure.
>
> The tissue Volume procedure works just fine but i'm not able to understand
> the output !
>
> I get three number for each patients (I just want the total intracranial
> volume). In the help section, it is suggested that these three numbers
> correspond to GM, WM and CSF volume. However, it is also mentionned that the
> sum of these tissue will be computed which doesn't seem to be the case.
>
> The Maximum tissue class is by default of three.
>
> So my question is :
> - Should I just add the three numbers to get total ICV (if there are GM, CSF
> and WM) ?
> - Is there an other way to compute automatically the total ICV with the
> tissue volume procedure of SPM12 ?
>
> I would like to use a procedure similar with the one described in the Malone
> et al. paper.
>
> Thank you so much for your help,
>
> Best regards,
>
> Charles
--
Kiyotaka Nemoto, M.D., Ph.D.
Assistant Professor
Department of Psychiatry
Division of Clinical Medicine, Faculty of Medicine
University of Tsukuba
1-1-1Tennodai Tsukuba, Ibaraki 305-8575, Japan
E-mail: [log in to unmask]
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