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. Author manuscript; available in PMC: 2017 Nov 1.
Published in final edited form as: Magn Reson Med. 2015 Nov 27;76(5):1364–1374. doi: 10.1002/mrm.25973

Figure 3.

Figure 3

Pulse sequences used to evaluate the performance of 2D FM pulses. (a) Conventional single-slice spin-echo sequence with slice selection along the longitudinal axis of the cylindrical volume excited by the 2D pulses. (b) A version of this sequence with spiral readout. Isochromats that experience phase coherence first during excitation will “re-cohere” last during readout. (c) With a double spin-echo version of the sequence, a constant echo time between excitation and readout phase coherences is possible.