Hi Zhang

1. the aseg.stats should contains statistics on intensities in various structures.

2. Do you want a surface or a measurement at each point? If you want a surface use mris_expand, if just a measure use mri_vol2surf with a projfrac of 0.5

cheers Bruce

On Sun, 29 Dec 2019, a Chinese reader wrote:

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Dear Freesurfer experts, I have some questions about intensity map:

1. If I would like to calculates the gray matter nulcei to white matter signal

intensity ratio (GWR), which command I can use. 2. If I want to calculate half the thickness of the gray matter of the cortex and get the surface file(*.mgh),  what should I do?

Best regards, Zhang Xia