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Intuitive design guidelines for fast spin echo imaging with variable flip angle echo trains
Author(s) -
Lebel R. Marc,
Wilman Alan H.
Publication year - 2007
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.21220
Subject(s) - flip angle , echo (communications protocol) , fast spin echo , signal (programming language) , echo time , variable (mathematics) , spin echo , nuclear magnetic resonance , physics , computer science , acoustics , magnetic resonance imaging , mathematics , medicine , mathematical analysis , computer network , radiology , programming language
We present a simple and intuitive means for determining the flip angles (FAs) required for smooth transitions between static pseudo steady states (SPSSs) in fast spin echo (FSE) imaging with variable FA (VFA) echo trains. We demonstrate the effectiveness of single and multiple transition pulses to successfully vary refocusing FAs while retaining high signal levels. The graphical interpretation presented here is consistent with previous analytical techniques and permits accurate signal‐intensity predictions along the echo train. Magn Reson Med 57:972–975, 2007. © 2007 Wiley‐Liss, Inc.