Dear Anastasia Yendiki ,

Thanks so much, I will read them.

Yours, Lulu

2013/10/15 Anastasia Yendiki ayendiki@nmr.mgh.harvard.edu

Hi Lulu - We actually have an automated method to do this. You can read about it in our paper: http://www.frontiersin.org/**Neuroinformatics/10.3389/** fninf.2011.00023/abstracthttp://www.frontiersin.org/Neuroinformatics/10.3389/fninf.2011.00023/abstract

And you can learn how to use it here: http://surfer.nmr.mgh.harvard.**edu/fswiki/Traculahttp://surfer.nmr.mgh.harvard.edu/fswiki/Tracula

If you wanted to do this manually, you wouldn't draw ROIs at the endings of the tracts, but deeper in the white matter. This is one paper on this: http://www.ncbi.nlm.nih.gov/**pubmed/17481925http://www.ncbi.nlm.nih.gov/pubmed/17481925

Hope this helps, a.y

On Sat, 12 Oct 2013, lujiao luo wrote:

Dear experts,

...

I was trying to define the ILF(inferior longtitudinal fasciculus), IFOF(inferori fronto-occipital fasciculus), arcuate fasciculus, and corpus callosum (CC). But I am not very familiar with the structure of the cortex. So I am considering that if I can segment some roi files from freesurfer aseg+aparc.annot file and changing them into .nii.gz file, Then use these rois as the seed of fiber tracking. Would you mind teaching me which rois I choose for each fiber tract if this way is possible?

Another question is about the meaing of labels with a wm- begining (e.g. wm-lh-G_frontal_superior) in the look-up table. Does it represent the white matter within the lh-G_ frontal_ superior or represent all white matter that passed through lh-G_frontal_superior?

Thanks so much for your concern.

Yours, Lulu

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