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. Author manuscript; available in PMC: 2016 Dec 1.
Published in final edited form as: Magn Reson Med. 2014 Dec 9;74(6):1621–1631. doi: 10.1002/mrm.25559

Figure 1.

Figure 1

a: A pulse sequence diagram of the MRF-FISP sequence. An adiabatic inversion pulse is followed by a series of FISP acquisitions. b: A sinusoidal variation of flip angles, and repetition times in a Perlin noise pattern, are used in the MRF-FISP sequence. c: One interleaf of a variable density spiral trajectory is used in each repetition. The spiral trajectory is zero moment compensated. It needs 24 interleaves to fully sample the center of the k space, and 48 interleaves for 256*256. The trajectory rotates 7.5 degrees every repetition.