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Subject:

Re: CAT12 - Mask for Surface based morphometry results?

From:

Christian Gaser <[log in to unmask]>

Reply-To:

Christian Gaser <[log in to unmask]>

Date:

Sun, 26 Mar 2017 20:18:01 +0100

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (60 lines)

Dear Robin,

the mapping of spatially normalized 3D data (in Dartel MNI space) is using a surface that was extracted from the Dartel template (without spherical registration).

Best,

Christian

On Sun, 26 Mar 2017 18:54:33 +0000, Robin Shao <[log in to unmask]> wrote:

>Dear all,
>
>
>May I ask whether the mapping function works if both volume- and surface-based data were obtained using segmentation based on customized DARTEL template? I thought not as I believe the spherical registration of surface data were based on some default DARTEL map, not customized ones?
>
>
>Many thanks,
>
>Robin
>
>
>Sent from Outlook<http://aka.ms/weboutlook>
>
>
>________________________________
>From: SPM (Statistical Parametric Mapping) <[log in to unmask]> on behalf of Rodolphe Nenert <[log in to unmask]>
>Sent: Friday, March 24, 2017 5:08 PM
>To: [log in to unmask]
>Subject: Re: [SPM] CAT12 - Mask for Surface based morphometry results?
>
>Thanks a lot for your advice Christian, it worked perfectly!
>
>Allow me a follow-up question, is it still possible to use the T-to-p map tool as I can�t use combine spmT files with my mask with a tool like imcalc. ?
>
>Thanks again,
>
>Rodolphe.
>
>> On Mar 24, 2017, at 2:52 AM, Christian Gaser <[log in to unmask]> wrote:
>>
>> Dear Rodolphe,
>>
>> On Thu, 23 Mar 2017 09:58:28 -0500, Rodolphe Nenert <[log in to unmask]> wrote:
>>
>>> Basically, I want to use an exclusive mask to create a contrast result following a SBM analysis.
>>>
>>> 1) CAT12 tool to create p-maps from T-maps does not seem to have the masking option. Is there another way to do it?
>>>
>>> 2) As the second level analysis is done with SPM12, I could eventually create the contrast in SPM and use the masking option, but my mask is a nifti file. Is there a way to convert my .nii file into .gii file for that particular purpose?
>>>
>> You can use the mapping function "Map Normalized Volume (Template Space) to Template Surface" to map nifti-data to a surface. Please note that the nifti image has to be in the template space (Dartel MNI after CAT12 spatial registration). Then you can use this mapped mask image as exclusive mask in the SPM results section.
>>
>> Best,
>>
>> Christian
>>
>>> Thanks!
>>
>>
>

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