Simultaneous multi-slice (SMS) MRI has become a popular technique in both research and clinical practice, as it provides information about multiple slices at the time of a conventional single-slice measurement. For technical reasons, SMS is commonly limited to the acquisition of parallel slices. Here, we propose a new Cartesian sequence for the simultaneous excitation of orthogonal slices. We dub this technique simultaneous orthogonal multi-slice (SOMS). In this proof of concept phantom study, we reconstruct two 2-fold undersampled, simultaneously acquired orthogonal slices.
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