Echo planar sequence

Lin DD, Filippi CG, Steever AB, Zimmerman RD (2001) Detection of intracranial hemorrhage comparison between gradient-echo images and b(0) images obtained from diffusion-weighted echo-planar sequences. AJNR Am J Neuroradiol 22 1275-1281... 

HeUand S, Kreibich W, Reith W, Benner T, Dorfler A, Forsting M, Sartor K. Comparison of echo-planar sequences forperfusion-weightedMRI Whichisbest iVe rorad/o/ogy. 1998 40 216-221... 

Fig. 1.21 Echo Planar Imaging (EPI) pulse sequence. Gradient-echo based multiple echoes are used for fast single-shot 2D imaging. Slice selection along Gs and frequency encoding along C, are utilized. Phase encoding is realized using short blipped gradient pulses along Gp.

Figure 16.18. Pulse sequence of echo planar imaging.

FIGURE 14.3 Pulse sequence for echo-planar imaging. Slice selection is carried out as in Fig. 14.2. The readout gradient Gy is rapidly switched in direction in synchrony with application of a pulsed phase-encode gradient G as indicated. Data are acquired while Gy is turned on but Gx is off. 

Fig. 6.2.14 [Man6] Pulse sequences for two variants of 2D echo-planar imaging.

The CIDNP effect has been employed to boost the sensitivity of Frydman s "ultrafast" NMR experiments, which record a two-dimensional spectrum in one scan through spatially encoding the indirect dimension by gradients and reading out the spectrum with an echo-planar imaging sequence. Another unusual combination of CIDNP with an imaging technique has been employed to study the spatial distribution of the reaction products during photolysis. " ... 

Figure Bl.14.4. k-space representations of the (a) spin-echo imaging pulse sequence in figure Bl.14.1. (b) echo-planar imaging sequence in figure Bl. 14.3 and (c) back-projection imaging. In (a) and (b) the components of the wave vectors and represent frequency and phase encoding, respectively. For back-...

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