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Easy improvement of signal‐to‐noise in RARE‐sequences with low refocusing flip angles
Author(s) -
Hennig Jürgen,
Scheffler Klaus
Publication year - 2000
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 - 10.1002/1522-2594(200012)44:6<983::aid-mrm23>3.0.co;2-8
Subject(s) - flip angle , signal (programming language) , pulse sequence , nuclear magnetic resonance , physics , intensity (physics) , pulse (music) , noise (video) , optics , acoustics , magnetic resonance imaging , computer science , medicine , artificial intelligence , image (mathematics) , detector , radiology , programming language
It is demonstrated that the signal intensity in a RARE (TSE, FSE…)‐sequence with low refocusing flip angle α can be significantly increased by setting the flip angle of the first refocusing pulse to 90°+α/2. In addition to the gain in signal intensity, the initial signal modulations over the first few echoes are reduced compared to a CPMG‐echo train with constant α. Magn Reson Med 44:983–985, 2000. © 2000 Wiley‐Liss, Inc.