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. Author manuscript; available in PMC: 2018 Feb 16.
Published in final edited form as: Magn Reson Med. 2017 Jul 7;79(3):1817–1828. doi: 10.1002/mrm.26814

FIG. 2.

FIG. 2

MRI pulse sequence for axisymmetric diffusion encoding (41,53). (a) Spin echo sequence with EPI image read-out (67,68) and a pair of modulated gradient waveforms with duration τ (red, green, and blue lines) encoding the signal for translational motion. The 90° and 180° RF pulses generate a spin echo at the time TE. (b) Four examples of gradient waveforms G(t) calculated with Eqs. [2]–[6] for the angles ζ = 0°, 20.5°, 32.1°, 54.7°. All examples have the same b-value, while the b-tensor anisotropy bΔ is given by the value of ζ through Eq. [7]. The global maximum gradient amplitude for the set of waveforms is Gmax.