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Robust selective signal suppression using binomial off‐resonant rectangular (BORR) pulses
Author(s) -
Ye Yongquan,
Hu Jiani,
Haacke E. Mark
Publication year - 2014
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.24149
Subject(s) - pulse (music) , imaging phantom , robustness (evolution) , signal (programming language) , acoustics , pulse sequence , phase difference , physics , materials science , optics , nuclear magnetic resonance , phase (matter) , computer science , chemistry , biochemistry , quantum mechanics , detector , gene , programming language
Purpose To study the selective signal suppression capability of a binomial off‐resonant rectangular (BORR) radiofrequency pulse method. Materials and Methods The BORR pulse consists of two consecutive rectangular pulses with a phase difference of π. The exact solution of the Bloch equations was used to simulate its frequency response. The BORR pulse was implemented in a gradient echo sequence and tested on phantoms, the knee, and the breast. Results The frequency response of the BORR pulse acquired on the phantom confirmed the theory. Broad suppression bands ensured high suppression efficiency and robustness in both in vitro and in vivo scans compared with other saturation pulses. Conclusion The BORR pulse method provides a simple, efficient, and robust selective signal suppression alternative for three‐dimensional short TR (repetition time) imaging. J. Magn. Reson. Imaging 2014;39:195–202. © 2013 Wiley Periodicals, Inc.