CPC G01R 33/4828 (2013.01) [G01R 33/5608 (2013.01); G06T 7/262 (2017.01); G06T 2207/10088 (2013.01)] | 15 Claims |
1. A magnetic resonance imaging (MRI) water-fat image separation method, comprising:
within an echo period, acquiring a first echo set corresponding to a Dixon water-fat separation calculation under a first readout gradient polarity, and acquiring a second echo set corresponding to the Dixon water-fat separation calculation under a second readout gradient polarity, wherein the first readout gradient polarity and the second readout gradient polarity are opposite, echoes in the second echo set being located at positions that are positionally symmetric to echoes in the first echo set with respect to an echo center of the echo period;
obtaining a first echo image set based on first echo set data acquired in each echo period;
obtaining a second echo image set based on second echo set data acquired in each echo period, wherein the first echo set and the second echo set each comprise:
one nearly-in-phase echo meeting a set in-phase requirement and one nearly-out-of-phase echo meeting a set out-of-phase requirement, the Dixon water-fat separation calculation being a two-point Dixon water-fat separation calculation; or
one nearly-in-phase echo meeting a set in-phase requirement and two nearly-out-of-phase echoes meeting a set out-of-phase requirement, the Dixon water-fat separation calculation being three-point Dixon water-fat separation calculation; and
performing a Dixon water-fat separation calculation, based on the first echo image set and the second echo image set, to obtain a water image and a fat image.
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