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Hello,

 

I had a question regarding the aseg.stats and was hoping to get some help.

 

1.       How is the TotalGray calculated? On the wiki page it mentioned that it is the sum of lhCortex + rhCortex + SubCortGray + CerebellumGM. I tried calculating this based on the formula but got different results.

a.       TotalGray (from the aseg.stats) = 751765.612392

b.      298534.487540 (lhCortex) + 287682.124852 (rhCortex) +  58860.000000 (SubCortGray) + 49.3682 (L_cerebellum-cortex) + 50.1232 (R_cerebellum-cortex) = 645176.103792

 

2.       We have subjects that were processed in v4.0.4 and v6.0.0. Since the TotalGray measure did not exist in the v.4.0.4, what could we use to calculate the volume?

 

Thank you so much in advance for your help!

 

Best,

Da-Yea

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