Re: [Icatb-discuss] about setupICA

[Srinivas R. <sra...@mr...>]

Hi Quanquan,

Default mask uses voxels >= mean to determine in brain voxels. It might not
work when temporal pre-processing is done on the data. You could use a
custom mask (matching size of fmri data) defining the
in brain voxels instead of  default mask.

Thanks,
Srinivas

On Wed, Dec 3, 2014 at 11:16 AM, Quanquan Gu <guq...@gm...> wrote:

> Hi experts,
>
> I used the realigned, normlized, smoothed, detrended, filtered and
> regressed ( with signals of WM, head motion, CSF regressed ) data sets to
> do ICA. I don't know if it's appropriate, some studies used only smoothed
> datasets. could you please help me to confirm it? And when I have chosen
> the fmri data set (a group of nii files), a error message poped up, showing
> :
>
> Creating Mask
> Default mask includes voxels >= mean. Using first file of each subject to
> create default mask ...
>
> ......................................
> Group ICA Error Information:
>
>
> Error using icatb_createMask (line 176)
> No voxels found. Error in creating Mask
>
> Error in ==> icatb_createMask at
> 176
>
> Error in ==> icatb_update_mask at
> 39
>
> Error in ==> applyCallback at
> 1462
>
> ......................................
> Error using icatb_displayErrorMsg (line 23)
>
>
> Error in icatb_setup_analysis>applyCallback (line 1519)
>     icatb_displayErrorMsg;
>
> Error while evaluating uicontrol Callback
>
> is there something wrong with my data format or other settings I got them
> wrong?
>
> Thanks in advance
>
> regards,
> Carmen
>
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