A Nyquist Modulated Echo‐to‐View Mapping Scheme for Fast Spin‐Echo Imaging

A new scheme for assignment of echoes to views in fast spin‐echo imaging was developed. The scheme places early and late echoes in alternating lines of the periphery of k ‐space; continued alternation of echoes arising closer to the middle of the echo train encodes the central portion of k ‐space. The scheme has two effects: a) The echo‐to‐echo signal decay that usually gives rise to multiple faint ghosts, now yields a single Nyquist ghost that is removed by phase over‐sampling. b) Mapping earlier echoes (and thus more energy) to the periphery of k ‐space yields sharper edges.