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SEMs used for MDE MRI. Five spatial encoding magnetic fields (SEMs) were revealed by the Singular Value Decomposition of the z-component of the magnetic fields generated by PatLoc surface SEM coils. These included a SEM with iso-intensity contours in “O” shapes (O), two linear SEMs (Linear-X and Linear-Y), and two multipolar SEMs (Multipolar-1 and Multipolar-2). The combinations of these five SEMs (Table 1) gave different configurations of MDE MRI.
