yes, seems good

On 9/2/2020 2:40 AM, 刘梦醒 wrote:

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Sorry I mean the talairach transform matrix in /mri/transform/talairach.xfm.

In this way, no matter how the brain is aligned when the data is collected, by translating it to a talairach coordinate system, the brain will be aligned to ac-pc at y-axis, the longitudinal fissure is aligned to z-axis, so x-axis is fixed. Then x=0 is the center of left and right hemisphere.

I checked the results it seems ok, but just want to make sure the logic is correct.

Many thanks!


On Tue, 1 Sep 2020 at 21:05, Douglas N. Greve <dgr...@mgh.harvard.edu <mailto:dgr...@mgh.harvard.edu>> wrote:









    What is TLRC? Otherwise, it sounds reasonable. I'd definitely look

    at the image to make sure:)






    On 9/1/2020 12:11 PM, 刘梦醒 wrote:








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    Thanks!

    I have a work-around solution but want to hear your comment

    on it.







    I use the TLRC transform matrix in mri/transform to

    translate the coordinates in native to TLRC, so that the

    origin set to anterior commisure. Then I cut the brain stem to

    left and right, by x>0 and x<0, then I use the inverse

    matrix to translate the left and right brain stem back.







    How do you feel about this?







    Many thanks!


    Mengxing














    On Tue, Sep 1, 2020 at 4:42 PM

    Douglas Greve <dgr...@mgh.harvard.edu
    <mailto:dgr...@mgh.harvard.edu>> wrote:






        Not that I know of, sorry





        On 9/1/20 10:20 AM, 刘梦醒 wrote:






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        Hi Freesurfer group,






        For some reason, I have to use the left and right

        brain stem separately.


        I wonder if there is one way to have a midline, to

        cut the brain stem into Left and Right?







        Many thanks,


        Mengxing














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