Dear Quentin,
Could you try modifying the spm_dcm_display.m file by commenting out
line 68: %M1(j,4) = 0;
https://github.com/spm/spm12/blob/r7219/spm_dcm_display.m#L68
You can ask to display again an extracted VOI file using the command:
>> spm_regions('Display','VOI_CSF_1.mat');
Best regards,
Guillaume.
On 04/01/18 16:36, Funk, Quentin wrote:
> SPM experts,
>
>
> I'm trying to use VOI's to extract time series for DCM in SPM. I'm using
> coordinates that came from a voxelwise analysis in SPM of some PET data,
> but when I plug those coordinates in, it shows the region in a different
> place than expected (e.g. if I open an MNI brain in a viewer and place
> the cursor at the same point, see attached images)
>
>
> Similarly, if I follow the example in the SPM 12 Manual (page 354)
> to get a voi for the CSF, the image in the graphics window shows a
> seed that intersects the cerebellum (see attached image). I had thought
> that these coordinates (0,-40,-5) must be incorrect--since they're
> supposed to be in the ventricle but they're at 0 on the X-axis, which is
> the midline in MNI space--and was unsurprised when I got the wrong
> image, but after getting a strange image with my own data I'm extra
> confused.
>
>
> Any help would be great!
>
>
> Quentin Funk, PhD
> Houston Methodist Research Institute
> 713-363-9003 <tel:713-363-9003>
>
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--
Guillaume Flandin, PhD
Wellcome Trust Centre for Neuroimaging
University College London
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