Re: [Freesurfer] effect of the radius on lGI

2009-10-29 Thread Marie Schaer
Hi, As explained in the paper, the radius of the sphere correspond to the region of interest in which you analyze gyrification: if you take 25mm, you will measure all the amount of cortical surface enclosed in a 25 mm radius from each of the cortical point (that is the default). You can

[Freesurfer] effect of the radius on lGI

2009-10-27 Thread Zhangyuanchao
Hi, expert,   Could anyone tell me the effect of the radius on lGI. After reading the paper on lGI carefully, I still can not get a clear view of the effect of the radius on lGI. I still wonder why the default radius are chosen to be 25mm since there is very little discussion of the standard