Read header from nifti files

Does anyone know how to read the heard of a nifti file?

I load my data using data=load_untouch_nii(). When I typed data.hdr I got the following:

data = 

struct with fields:

      hk: [1×1 struct]
    dime: [1×1 struct]
    hist: [1×1 struct]

How can I see the details of the header?