Dear Freesurfer Developers,

I have two questions about coordinate of ROI when running the QDEC module: (1) After drawing a ROI,the terminal demostrated the results like this:

ClusterNo Max VtxMax Size(mm^2) TalX TalY TalZ CWP CWPLow CWPHi NVtxs WghtVtx Annot

1 -4.407 13586 966.10 44.2 -39.2 7.1 0.02020 0.01840 0.02200 2402 -4786.73 bankssts

Could you tell me what exactly the "TalX TalY TalZ" refers to and whether the coordinate "TalX TalY TalZ" represents the VtxMax of the ROI? When I clicked the button "FindClustersAndGotoMax", the terminal showed the results:

ClusterNo Max VtxMax Size(mm2) TalX TalY TalZ NVtxs Annotation

--------- --- ------ --------- ---- ---- ---- ----- ----------

1 -1.6946 7 966.10 45.9 -43.8 7.5 2402 bankssts

The size(966.10mm2) and NVtxs(2402) of the two results are the same, but the "Tal X Y Z" is a little different. So are they the same region?

(2) I used mris_anatomical_stats to get a set of statistics on each individual label created before, the average thickness,number of vertices, surface area and gray matter volume were saved in the file of stat. Was the average thickness the normalized one?

Thank you for your help.

Best regards,

Dongsheng Wu

Huaxi MR Research Center, Westchina Hospital,Sichuan University

Chengdu,Sichuan,China