[Freesurfer] Help with mri_vol2surf incorrect surface generation

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We are experiencing issues with `mri_vol2surf` generating an incorrect surface for the `Paramagnetic.nii` volume. Although the registration file (`volume_transform.dat`), created using `bbregister`, appears accurate, the output surface file (`Paramagneticsurface.mgh`) does not look correct. Specifically, some voxel values in the cortical areas are incorrectly predicted as zero.

Command: ```bash input_volume=Paramagnetic.nii output_surface=Paramagneticsurface.mgh output_reg_file=volume_transform.dat

mri_vol2surf --mov "$input_volume" --reg "$output_reg_file" --hemi lh --projfrac 0.2 --o "$output_surface" ```

Any guidance on resolving this issue with the surface generation would be greatly appreciated.