Frequency Selective Balanced SSFP Imaging with Randomised TR

Leupold, J; Hennig, J; Scheffler, K

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Frequency Selective Balanced SSFP Imaging with Randomised TR

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https://cds.ismrm.org/ismrm-2003/ismrm03.pdf
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Citation

Leupold, J., Hennig, J., & Scheffler, K. (2003). Frequency Selective Balanced SSFP Imaging with Randomised TR. Poster presented at 11th Scientific Meeting of the International Society of Magnetic Resonance in Medicine (ISMRM 2003), Toronto, ON, Canada.

Cite as: https://hdl.handle.net/21.11116/0000-0005-779B-7

Abstract

The balanced SSFP signal amplitude shows strong dependency on off-resonance frequencies (banding artifact). Several methods have been proposed to broaden the stopband for fat/water selection. However, a suppression is not possible for the whole range of off-resonance frequencies. Here we present a method that accomplishes the frequency selection by randomizing TR for each sequence repetition step and acquiring several acquisitions. It offers selectivity only to the on-resonance signal and suppresses off-resonance frequencies. The method is useful for applications which require averaging, such as low gamma nuclei CSI due to low SNR.