Complete Sequences, Elements and Building Blocks

Hundreds of pulse sequences [5.1 - 5.4] have been developed and every month improvements and new combinations of sequence units are published. For a number of different reasons there is no systematic nomenclature for the naming of pulse sequences. A name based on the exact combination of sequence units used in a pulse sequence would be very unwieldy whilst spectrometer manufacturers have built up their own pulse sequences library using their own nomenclature system. In addition the number and type of characters in the name depends upon the spectrometer operating system. 

The basic elements summarized in Table 5.1 are usually described by their overall effect on the spin system such that a IH cp decoupling sequence is described as the suppression of the H) coupling during the FID acquisition on the channel. 

NMR Spectroscopy Data Acquisition, Second Edition. C. Schom, B. Taylor Copyright 2004 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim ISBN 3-527-31070-3 

Sometimes sequence units can be mixed up so to avoided confusing a BIRD unit and a INEPT sequence it is important that all pulse sequences are analysed starting with the first pulse to trace the coherence evolution. 

Hard/shaped pulse, soft pulse, DANTE pulse train, composite pulse, cw-irradiation, cp decoupling sequence, spinlock, constant or incremented delay 

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