B1-Mapping with the Transient Phase of SSFP

Ganter, C; Settles, M; Scheffler, K; Bieri, O

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B1-Mapping with the Transient Phase of SSFP

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https://cds.ismrm.org/protected/11MProceedings/files/1_program.htm
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Citation

Ganter, C., Settles, M., Scheffler, K., & Bieri, O. (2011). B1-Mapping with the Transient Phase of SSFP. In 19th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2011).

Cite as: http://hdl.handle.net/21.11116/0000-0002-4C33-0

Abstract

In rapid SSFP sequences, the approach toward dynamical equilibrium (transient phase) typically consists of a smooth decay and a superimposed damped oscillation. Recent theoretical studies for the FID signal of unbalanced SSFP showed that the frequency of the latter is closely connected to the actual flip angle α and depends only weakly on tissue parameters. In this work, we show that fast and accurate B1-mapping, based on a frequency analysis of the transient phase of SSFP, can be implemented in a conceptually simple and flexible manner.