Moving left to right in the figure, you will first find the complex method of estimating PDFF, which acquires real and imaginary images to generate a PDFF map from 0–100%, labeled “C-MRI PDFF” here. Next are the magnitude images which are squared to generate a PDFF map from 0–50%, labeled “M-MRI PDFF” here. Both techniques acquire multiple images at echo times optimally spaced for fat water separation and T2* signal decay correction, and both apply a multi peak spectral model to correct for multi-frequency interference effects of fat proton signals. Note that for magnitude based PDFF, the calculated image only has a range of 0 to 50%. This is within the typical biological limits of liver fat content.