You will want the "Mean" column. The value is

100*(W-G) GWC = --------- 0.5*(W+G)

The area is the surface area of the label. The "SNR" is the spatial mean gwc divided by the spatial stddev gwc, probably not very useful

On 05/17/2017 01:43 PM, Yaakub, Siti Nurbaya wrote:

Hi,

I read from a previous post that the "{lh,rh}.w-g.pct.stats files in $SUBJECTS_DIR/subject/stats … will have the mean gray-white contrast for each ROI in the aparc."

I've looked at the lh.w-g.pct.stats file and am not sure which values I should be looking at if I am interested in the ratio of grey to white matter averaged over each of the ROIs? What are the area in mm2 and the SNR in this w-g context?

Thank you, Siti

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