Print

Print
As I mentioned before, I want to investigate the structural integrity difference between two populations of single fiber tracts (ex: corticospinal tract). I tried what was suggested and made a mask on a standard atlas and multiple that against the FA_mean_skeleton_mask. When I tried to run randomise using the same parameters and files when I did the whole brain except exchanging the new mean_FA_skeleton_mask, I got the message: 

Loading Data: 
Data loaded
ERROR: Program failed

An exception has been thrown
Logic error:- detected by Newmat: incompatible dimensions

MatrixType = Rect   # Rows = 53; # Cols = 53
MatrixType = Rect   # Rows = 1; # Cols = 884
Trace: MatrixMult.


What am I doing wrong?

Thanks,
Leslie
On Fri, Jan 20, 2012 at 10:45 AM, Leslie Engineering <[log in to unmask]> wrote:
By overlay, do you mean I use fslmaths and multiply the mean_skeleton_mask with say a masks I make of a specific tract?

Sorry to be dense!

Thanks,

Leslie 


On Wed, Jan 18, 2012 at 8:36 PM, Jeremy Strain <[log in to unmask]> wrote:
Hi,
 I  wanted to chime in on this conversation because I have tried this approach before with confusing results.  Whenever I have restricted my mean skeleton to a Track of interest (in this case the corticospinal tract) the results show fewer voxels than when I ran the global comparison.  In other words comparing the number of significant voxels within the same region is always larger during the original analysis as compared to an additional randomize analysis that only comprises the tract of interest.  I am curious if this issue is common or if I am overlooking something.

Thanks,
Jeremy