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Starter sequence for steady‐state free precession imaging
Author(s) -
Foxall D. L.
Publication year - 2005
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.20437
Subject(s) - starter , precession , steady state (chemistry) , nuclear magnetic resonance , sequence (biology) , relaxation (psychology) , transient (computer programming) , physics , magnetic resonance imaging , steady state free precession imaging , computer science , condensed matter physics , chemistry , medicine , biology , neuroscience , biochemistry , food science , radiology , operating system
The dynamic equilibrium exploited by balanced steady‐state free precession imaging develops slowly because its formation is dependent on both spin–spin and spin–lattice relaxation times. Attempting to image before steady state is established results in artifacts due to transient signal oscillations. Using a starter sequence to precondition the spin system can significantly reduce the delay before imaging. An improved design for a steady‐state starter sequence is presented. The new sequence has the advantage of uniformly exciting the steady‐state response for all resonance offsets and can be phase cycled to suppress banding artifacts. Magn Reson Med 53:919–929, 2005. © 2005 Wiley‐Liss, Inc.