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. Author manuscript; available in PMC: 2008 May 26.
Published in final edited form as: Magn Reson Med. 2002 Apr;47(4):655–664. doi: 10.1002/mrm.10105

FIG. 1.

FIG. 1

Pulse sequence used in the implementation of multishot EPI-SSFP including the excitation RF pulse, the slice-selection (GZ), phase-encoding (GY), and readout (GX) gradients. The first readout waveform (GX1) displays the standard balanced single-echo readout implemented for one-echo SSFP. The second readout waveform corresponds to the bipolar implementation of two-echo SSFP (GX2,BIPOLAR), while the third one corresponds to the “flyback” version of two-echo SSFP (GX2,FLYBACK). The last readout waveform is that of three-echo SSFP (GX3). All slice-select and readout wave-forms are zeroth- and first-moment nulled over TR. The RF transmit and receive phases were alternated to avoid signal cancellation. The phase encoding displayed is that of bipolar two-echo SSFP. Note that although GY is not first-moment nulled for any of the implementations displayed here, the use of PAGE greatly reduces the amplitude of the phase-encoding blip. The end of the readout waveforms corresponds to the actual TR of each sequence.