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Iterative schemes for bilinear operators; application to spin decoupling

1988; Elsevier BV; Volume: 77; Issue: 2 Linguagem: Inglês

10.1016/0022-2364(88)90178-3

1557-8968

A.J. Shaka, C.J Lee, Alexander Pines,

Advanced MRI Techniques and Applications

We extend the idea of iterative schemes from the single-spin to the two-spin-case. As an application we derive a new series of broadband heteronuclear decoupling sequences, called the DIPSI sequences. They give better quality decoupling of protons from carbon-13 than previous sequences like WALTZ-16 when there is scalar coupling among the protons. In the absence of such coupling, the DIPSI sequences offer the same high standard of performance as WALTZ-16, but over somewhat smaller bandwidths.