Figure 5: Ideal vs. actual encoding phase at a single k-space location.

A. Simulated off-resonance fieldmap in Hz. B. 1D plots of the encoding fields as a function of position, where the red dotted line correspond to the dotted red line in A. C. The ideal k-space encoding phase for $(k_x,k_y)=(0,0.426{\mathrm{cm}}^{-1})$. D. The actual k-space encoding phase for $(k_x,k_y)=(0,0.426{\mathrm{cm}}^{-1})$. Combined with k-space encoding errors at other k-space sampling locations, this phase error will lead to off-resonance image artifacts.