US 11,941,733 B2
System and method for motion signal recalibration
Tao Feng, Houston, TX (US); and Gang Yang, Shanghai (CN)
Assigned to SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD., Shanghai (CN)
Filed by SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD., Shanghai (CN)
Filed on Aug. 8, 2022, as Appl. No. 17/818,356.
Application 17/818,356 is a continuation of application No. 16/799,915, filed on Feb. 25, 2020, granted, now 11,410,354.
Prior Publication US 2022/0383566 A1, Dec. 1, 2022
Int. Cl. G06T 11/00 (2006.01)
CPC G06T 11/008 (2013.01) [G06T 2210/41 (2013.01); G06T 2211/412 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for motion signal recalibration, implemented on a computing device having one or more processors and one or more storage devices, the method comprising:
obtaining 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, wherein the motion signal includes a respiratory signal including a plurality of peaks and a plurality of valleys;
determining durations of actual motion cycles based on durations of the plurality of motion cycles;
correcting 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 durations of actual motion cycles to obtain corrected motion cycles; and
reconstructing a PET image by gating the PET data based on the corrected motion cycles.