help > RE: Graph-theory in conn
Jul 21, 2012  07:07 PM | Alfonso Nieto-Castanon - Boston University
RE: Graph-theory in conn
Hi Igor,

The AAL atlas is already normalized/coregistered to MNI space (and the toolbox does not have any problem when specifying ROIs using volumes that have different voxel sizes and/or bounding box definitions from the MNI template, as long as these volumes are correctly normalized/coregistered), so you should be able to use this atlas without any modifications.

Best
Alfonso

Originally posted by Igor M:
Hello again,

Thanks for your quick replies. One more question.

The aal template provided by conn (conn\utils\otherrois\aal.nii) has 181x217x181 voxels and a 1x1x1mm spatial resolution.

Conn does not generate any error messages when this ROI template is used with the MNI152 structural image (91x109x91 voxels, 2x2x2mm). Does this mean that conn is registering one image to the other in the background?

Or should I register the aal template to MNI space myself and then just use the coregistered aal template for analysis?

I've run several analyses without realizing that this was happening and now I'm not sure if the results are legitimate.

Thanks!
Quote & Reply Reply 

Threaded View

TitleAuthorDate
Igor M Jul 9, 2012
Igor M Jul 9, 2012
Alfonso Nieto-Castanon Jul 10, 2012
Igor M Jul 10, 2012
Alfonso Nieto-Castanon Jul 11, 2012
Saman Sarraf Jan 21, 2014
Igor M Jul 12, 2012
Alfonso Nieto-Castanon Jul 13, 2012
Igor M Jul 21, 2012
RE: Graph-theory in conn
 Alfonso Nieto-Castanon Jul 21, 2012