Units of Fit_ppm_complex_TE()

[Byumri Rf]

Hi MEDI experts,

Can you confirm the output units of Fit_ppm_complex_TE()?

It looks to me that the script fits a first order polynomial to the phase of the first 3 echoes. The output p1, which is the slope of the polynomial, should have units of phase per second (assuming that the input vector is also in units of seconds.) Is this interpretation correct?

Because, when I put in some test data, the output seems to be whatever the frequency shift of each pixel is multiplied by the spacing between the first two echo times. Is this second interpretation the more correct understanding of Fit_ppm_complex_TE()?

Thanks!