Computer Graphics for Pulse Sequence Analysis

The development of software for the simulation of NMR experiments has increased at an enormous pace in the last decade. Its usefulness has spread far beyond the analysis of lineshapes and spectra. Today, search-and-optimize strategies are used to develop new pulse sequences while other programs measure the performance of pulse sequences on spin systems of interest [1, 2]. Up to now, most of the output from these programs has been displayed as twodimensional hard-copy output. With the arrival of relatively inexpensive graphics workstations, the possibility of visualizing the time development of the density operator has spurred us to develop graphics software in conjunction with our ongoing development of simulation software. Current projects which benefit from graphical analysis include the development of "time-suspension" sequences for use with solids imaging, development of improved sequences for the creation of Zeeman or quadrupolar order in deuterium NMR, and analysis of artefacts seen in imaging experiments in the presence of flow. Time Suspension