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. Author manuscript; available in PMC: 2013 Jun 26.
Published in final edited form as: NMR Biomed. 2011 Aug 23;24(8):958–972. doi: 10.1002/nbm.1761

Figure 7.

Figure 7

Polarization transfer sequence based on adiabatic AFP and BIR-4 pulses. The acquisition phase should be phase-cycled in concert with the second 1H 90° pulse in order to retain the transferred polarization and cancel the direct 13C magnetization. All RF pulses are executed with BIR-4 waveforms, except for the first 13C and last 1H RF pulses, which are executed as shorter AFP pulses, thereby reducing RF power deposition. WALTZ-16 is often used for broadband decoupling during acquisition.