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. Author manuscript; available in PMC: 2015 May 1.
Published in final edited form as: J Magn Reson. 2014 Mar 1;242:243–255. doi: 10.1016/j.jmr.2014.02.010

Fig. 6.

Fig. 6

(a) Waveforms of ‘spredrex’ (blue) and truncated ‘sinc’(grey) FA=80° pulses used in our ‘Four-FA MRI sequences. The ‘spredrex’ pulse is more than twice as long as the truncated sinc pulse. Parts (b–d) show the slice profiles for the spredrex and sinc pulses determined from the magnitude of the transverse magnetization for (b) 30°, (c) 80°, and (d) 140° pulses used in the ‘Four-FA studies. The dashed red line is an ideal 5mm slice pulse profile.