Patent ID: 11941733
Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 17:
18. A system, comprising:
a storage device storing a set of instructions, and
at least one processor configured to communicate with the storage device, wherein when executing the set of instructions, the at least one processor is configured to cause the system to:
obtain a motion signal of a subject from positron emission tomography (PET) data of the subject, wherein the motion signal represents a plurality of motion cycles, and different motion cycles include different fluctuation degrees, wherein the motion signal includes a respiratory signal including a plurality of peaks and a plurality of valleys;
determine a distribution of the motion cycles, wherein the distribution of the motion cycles indicates a probability that each motion cycle of the plurality of motion cycles corresponds to an actual motion cycle;
correct the motion cycles of the motion signal by flipping one or more peaks and/or one or more valleys of the respiratory signal based on the distribution of the motion cycles to obtain corrected motion cycles; and
reconstruct a PET image by gating the PET data based on the corrected motion cycles.