Freesurfer thickness normalized map

Hello,

I get the thickness data from custom average subject:

thick_meanavg=nib.load('mean_thickness.mgh').get_data().view(type=np.ndarray

and one subject:

thick_subj=nib.load('lh.thickness.fsaverage.mgh').get_data().view(type=np.ndarray

normalized it to avoid thickness over intensities regions:

?

and ploted distribution of thicknesses of average and subjects:

Screenshot%20(37)

Now I would like to transform normalized data (norm on plot) to ?h.thickness map.

Is it possible to transform from ndarray to ?h.thickness to apply in on ?h.inflated subject thick_subj?

Thank you!