Separation of lipid and water MR imaging signals by chopper averaging in the time domain.

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Abstract
A convenient alternative to Dixon''s water/lipid imaging technique is proposed. The sequence exploits the automatic paired averaging capability that is used in commercial magnetic resonance imaging systems for data averaging to achieve lipid suppression. This can be easily implemented via a minor modification to an existing partial saturation sequence. This approach provides linear suppression of lipid signals that is independent of the relative abundance of water and lipid contributions, unlike the characteristics of the original Dixon sequence. The proposed sequence can be tuned before the imaging procedure to ensure optimum timing and freqeuncy adjustment.

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