Systems and methods for positron emission tomography image reconstruction

A system for reconstructing a positron emission tomography (PET) image, comprising:

• at least one storage device storing a set of instructions;
• and
• at least one processor in communication with the at least one storage device, when executing the stored set of instructions, the at least one processor causes the system to perform operations including:
• obtaining PET data of a subject, the PET data corresponding to a plurality of voxels in a reconstructed image domain;
• obtaining a motion signal of the subject;
• obtaining motion amplitude data, the motion amplitude data indicating a motion range for each voxel of the plurality of voxels;
• determining gating data based at least in part on the motion amplitude data, the gating data including useful percentage counts each of which corresponds to at least one voxel of the plurality of voxels;
• gating the PET data based on the gating data and the motion signal;
• and
• reconstructing a PET image of the subject based on the gated PET data.

A non-transitory computer readable medium, comprising at least one set of instructions, wherein when executed by at least one processor of a computing device, the at least one set of instructions cause the at least one processor to effectuate a method comprising:

• obtaining PET data of a subject, the PET data corresponding to a plurality of voxels in a reconstructed image domain;
• obtaining a motion signal of the subject;
• obtaining motion amplitude data, the motion amplitude data indicating a motion range for each voxel of the plurality of voxels;
• determining gating data based at least in part on the motion amplitude data, the gating data including useful percentage counts each of which corresponds to at least one voxel of the plurality of voxels;
• gating the PET data based on the gating data and the motion signal;
• and
• reconstructing a PET image of the subject based on the gated PET data.