Yin-Cheng Kris Huang1,2, Teng-Yi Huang3, Wen-Chau Wu4, Ying-Po Liao5, Hsiao-Wen Chung1,2
1Department of Electrical Engineering, National Taiwan University, Taipei City, Taiwan; 2Department of Radiology, Tri-Service General Hospital, Taipei City, Taiwan; 3Department of Electrical Engineering, National Taiwan University of Scienece and Technology, Taipei City, Taiwan; 4Graduate Institute of Clinical Medicine, National Taiwan University, Taipei City, Taiwan; 5Department of Civil Engineering, National Taiwan University, Taipei City, Taiwan
Transition into Driven Equilibrium balanced steady-state free precession sequence (TIDE bSSFP) has been shown to carry an intrinsic fat suppression. This phenomenon was described to come from the appearance of an off-resonance signal null or transient stopbands. Fat suppression remained although TIDE preparations of various TIDE-specific parameters were used. In this study, we devoted ourselves to the analysis of the mechanism why the signal null comes to existence, using simulation and analytical derivation. The results show that the magnetization of a dephasing angle c = 360X evolves in a fashion analogous to inversion recovery (IR), which might be informally dubbed as frequency-selective IR-like evolution.
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