CHEMICAL SHIFT CODED IMAGING METHOD BASED ON TRANSITION REGION AND REGIONAL ITERATIVE PHASOR EXTRACTION

    公开(公告)号:US20250148746A1

    公开(公告)日:2025-05-08

    申请号:US19019221

    申请日:2025-01-13

    Abstract: The present disclosure discloses a chemical shift coded imaging method based on a transition region and regional iterative phasor extraction. Acquiring an initial image, and determining an initial phasor solution of the transition region based on the initial image; performing regional iterative phasor extraction in at least two set directions by taking the initial phasor solution as initial information, and obtaining a target phasor solution based on a regional iterative phasor extraction result corresponding to each set direction; and determining a first chemical composition signal and a second chemical composition signal based on the target phasor solution, and performing chemical shift coded imaging based on the first chemical composition signal and/or the second chemical composition signal. By means of regional iterative phasor extraction in a plurality of dimensions, wrong phasor information is transferred independently along different dimensions, wrong information transferred in different directions is excluded.

    METHOD, APPARATUS, AND DEVICE FOR MAGNETIC RESONANCE CHEMICAL SHIFT ENCODING IMAGING

    公开(公告)号:US20200241099A1

    公开(公告)日:2020-07-30

    申请号:US16645798

    申请日:2015-12-30

    Abstract: A method, an apparatus, and a device for magnetic resonance chemical shift encoding imaging are provided. The method includes in a phasor-error spectrum established based on a simplified multi-point magnetic resonance signal model, determining a pixel point having a unique phase factor value and causing the phasor-error spectrum to reach a local minimum value as an initial seed point; estimating a phase factor value of a pixel point to be estimated according to the initial seed point to obtain a field map; mapping and merging the field maps at the highest resolution to obtain a reconstructed field map; determining a reconstructed seed point from the reconstructed field map, and estimating the reconstructed seed point to obtain a phase factor value of a reconstructed pixel point to be estimated.

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