[Freesurfer] Control points coordinates

Hi Freesurfer users! We are performing such analysis on Matlab using cartesian coordinates of the control points for the study of cortical thickness. We have some problems to exactly localize control points from matlab viewing to freview or tkmedit: if the localization in Matlab is fine, in freeview are there some trasformations that I'm missing? We' d like to know if is there a file that exactly reports the trasformation matrix to change Cartesian coordinates (row, column, slice) into the "Volume RAS coordinates§" ( i.e. the coordinates used in "control.dat" file)? Any suggestions will be appreciate. Thanks in advance

Andrea Gerardo Russo Student at University of Naples "Federico II" (Italy)