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. Author manuscript; available in PMC: 2010 Jul 1.
Published in final edited form as: Magn Reson Med. 2009 Jul;62(1):193–204. doi: 10.1002/mrm.21990

Figure 2.

Figure 2

a: Examples of multiple-TR sequences are shown: bSSFP (N = 1), ATR-SSFP (N = 2), 3-1-1 (N = 3), 2-2-1-1 (N = 4). All RF pulses have the same flip angle (α); however, the phase cycling pattern may vary: (0-90-180-270)° for ATR-SSFP, and (0-180)° for the rest. Data is acquired only during the labeled intervals, which are usually in the longer TRs. b: The corresponding transverse magnetization profiles for the bSSFP, ATR-SSFP, 3-1-1, and 2-2-1-1 sequences are shown. ATR-SSFP creates a stop-band around the fat resonance (−220 Hz at 1.5 T); however, its pass-band is non-uniform. In contrast, both multiple-TR sequences (3-1-1 and 2-2-1-1) have a flatter pass-band. The 2-2-1-1 profile has a broader stop-band compared to the other techniques.