US 12,226,201 B2
MRI system comprising patient motion sensor and signal processing method
Randall H. Buchwald, Nashotah, WI (US); and Louis Jay Vannatta, Crystal Lake, IL (US)
Assigned to GE Precision Healthcare LLC, Wauwatosa, WI (US)
Filed by GE Precision Healthcare LLC, Wauwatosa, WI (US)
Filed on Jul. 20, 2022, as Appl. No. 17/868,985.
Application 17/868,985 is a continuation in part of application No. 16/551,011, filed on Aug. 26, 2019, granted, now 11,419,516.
Prior Publication US 2022/0361767 A1, Nov. 17, 2022
Int. Cl. A61B 5/055 (2006.01); G01R 33/341 (2006.01); G01R 33/34 (2006.01)
CPC A61B 5/055 (2013.01) [G01R 33/341 (2013.01); G01R 33/34046 (2013.01)] 20 Claims
OG exemplary drawing
 
11. A method of processing a motion signal from a motion sensor having a resonator configured to sense motion of a patient in an imaging system, the method comprising:
receiving motion signal values sensed by the motion sensor;
detecting that a slope magnitude of the motion signal values exceeds a first threshold slope indicating a step change in the motion signal at a first time;
determining an amplitude offset by comparing the motion signal values received before the first time to the motion signal values received after the first time; and
adding the amplitude offset to the motion signal values received after the first time until an end to the step change in the motion signal is detected to generate a corrected motion signal; and
controlling image capture by the imaging system based on the corrected motion signal.