Easy improvement of signal-to-noise in RARE-sequences with low refocusing flip 
angles

Hennig, J; Scheffler, K

doi:10.1002/1522-2594(200012)44:6<983::AID-MRM23>3.0.CO;2-8

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Easy improvement of signal-to-noise in RARE-sequences with low refocusing flip angles

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https://onlinelibrary.wiley.com/doi/epdf/10.1002/1522-2594%28200012%2944%3A6%3C983%3A%3AAID-MRM23%3E3.0.CO%3B2-8
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Citation

Hennig, J., & Scheffler, K. (2000). Easy improvement of signal-to-noise in RARE-sequences with low refocusing flip angles. Magnetic Resonance in Medicine, 44(6), 983-985. doi:10.1002/1522-2594(200012)44:6<983:AID-MRM23>3.0.CO;2-8.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0013-E3DA-3

Abstract

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.