FIGURE 2.

A, Acquired 4‐echo MESS images, showing the FID‐like echoes (S+) and echo‐like echoes (S−). Water and fat in echo 1 (TE = 3.5 ms) and echo 4 (TE = 15.6 ms, effective TE = 34.7 ms) are mostly opposed‐phase, while for echo 2 (TE = 6.5 ms) and echo 3 (TE = 12.6 ms, effective TE = 31.7 ms) they are mostly in‐phase. B, Parameter maps reconstructed from the MESS images: water and fat (magnitude and phase), $R_2$, phase for S+ ($b_{+}$) and S− ($b_{‐}$), and magnetic field inhomogeneity (b). Note that the phase parameters wrap around outside the $\left[‐\pi ,\pi \right]$ range