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  Is TrueFISP a gradient-echo or a spin-echo sequence?

Scheffler, K., & Hennig, J. (2003). Is TrueFISP a gradient-echo or a spin-echo sequence? Magnetic Resonance in Medicine, 49(2), 395-397. doi:10.1002/mrm.10351.

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Scheffler, K1, Author           
Hennig, J, Author
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1External Organizations, ou_persistent22              

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 Abstract: It is commonly accepted that TrueFISP (balanced FFE, FIESTA) belongs to the class of gradient-echo (GRE) sequences. GRE sequences are sensitive to dephasing effects of the transverse magnetization between the excitation pulse and echo acquisition, and phase coherence is only established directly after and before excitation pulses. However, an analysis of the phase evolution of transverse magnetization in a TrueFISP experiment shows very close similarities to the echo formation of a spin-echo (SE) experiment. If dephasing between excitation pulses is below ±π, TrueFISP exhibits a nearly complete refocusing of transverse magnetization at TE = TR/2. Only signals acquired before and after TR/2 show an additional Tmath image sensitivity.

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 Dates: 2003-02
 Publication Status: Published in print
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 Identifiers: DOI: 10.1002/mrm.10351
BibTex Citekey: SchefflerH2003
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Title: Magnetic Resonance in Medicine
Source Genre: Journal
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Publ. Info: New York : Wiley-Liss
Pages: - Volume / Issue: 49 (2) Sequence Number: - Start / End Page: 395 - 397 Identifier: ISSN: 0740-3194
CoNE: https://pure.mpg.de/cone/journals/resource/954925538149