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Hi Sourena, Thanks a lot. I tried: fslswapdim orig_input -x y z flipped_output Because the orig_input has been registered into the T1 image, I don't need to do further registration, right? Mingxia On Wed, May 8, 2013 at 8:48 AM, Sourena Soheili <[log in to unmask]> wrote: > Hi, > I have not done it before and others may have better ideas;but maybe it > works: > swap left/right axis signs of both your original T1 and mask. If the > left/right axis is x it would be: > fslswapdim orig_t1 -x y z flipped_t1 > fslswapdim orig_mask -x y z flipped_mask > > Use flirt with 6DOF to register flipped_t1 into orig_t1, and apply the > transformation matrix to your flipped_mask. > > Cheers, > Sourena > > On 5/8/13, zhang mingxia <[log in to unmask]> wrote: > > Dear FSL experts, > > > > I have a result in left hemisphere and want to investigate the laterality > > of this area. So, I planned to make a mask of this area then make the > > corresponding right side of mask based on the first mask and then extract > > the mean value of the two masks for further calculation. > > > > My problem is I don't know how to make the corresponding right side of > mask > > based on mask in the left hemisphere. Hope to get some advice. > > > > Thanks in advance. > > > > Mingxia Zhang > > >