I compared the thickness, area, volume in the mild traumatic brain injury patients with health control by FreeSurFer, and found a statistic difference region in the cortex area, I defined the statistic difference region as a label on the fsaverage and mapped this label to subjects by Qdec/mri_label2label. The label defined on the fsaverage was mapped onto all subjects successfully, and the label in subjects matched well with the inflated cortex of subjects in Freeview Then the area value of the label in every single subjects was extracted, and I found that there is no statistic difference in the area value between the mild traumatic brain injury patients and health control. I have checked the segmentation of every subjects and it was a good job done by FreeSurFer.