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Signal recovery in free induction decay imaging using a stimulated spin echo
Author(s) -
Hsu JungJiin,
Lowe Irving J.
Publication year - 2002
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.10057
Subject(s) - free induction decay , pulse sequence , extrapolation , nuclear magnetic resonance , spin echo , physics , signal (programming language) , k space , merge (version control) , offset (computer science) , algorithm , computer science , chemistry , magnetic resonance imaging , mathematics , mathematical analysis , fourier transform , medicine , quantum mechanics , information retrieval , radiology , programming language
A novel pulse sequence for acquiring a stimulated spin echo (SSE) is devised and implemented to recover the initial portion of the signal that is usually blanked or distorted in MRI using free induction decays (FIDs). The receiver‐phase offset, center of the k ‐space, and time frame coordinates of the FID data points can be accurately determined from the SSE. A simple numerical method of signal recovery is formulated which can merge the FID and the SSE data for higher extrapolation accuracy. The application of the signal recovery method is demonstrated using the rotating ultrafast imaging sequence (RUFIS). The result shows the importance of experimentally finding the correct time origin of the FID signal. Magn Reson Med 47:409–414, 2002. © 2002 Wiley‐Liss, Inc.