US 12,313,718 B2
Target motion signal acquisition
Yan Tu Huang, Shenzhen (CN); and Peter Speier, Erlangen (DE)
Assigned to Siemens Healthineers AG, Erlangen (DE)
Filed by Siemens Shenzhen Magnetic Resonance Ltd., Shenzhen (CN)
Filed on Jan. 30, 2023, as Appl. No. 18/102,846.
Claims priority of application No. 202210113947.8 (CN), filed on Jan. 30, 2022.
Prior Publication US 2023/0243911 A1, Aug. 3, 2023
Int. Cl. G01V 3/00 (2006.01); G01R 33/56 (2006.01); G01R 33/565 (2006.01)
CPC G01R 33/56509 (2013.01) [G01R 33/5608 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for acquiring at least one target motion signal in a magnetic resonance imaging system, comprising:
acquiring, by a multi-channel receiver comprising multiple local coils with integrated pilot tone devices, multi-channel complex signals, wherein each of the multi-channel complex signals is a signal received after a high-frequency signal transmitted by a pilot tone transmitter is modulated by at least one target motion signal of a scanned object in magnetic resonance scanning;
acquiring, by at least one processor operatively coupled to the multi-channel receiver, from the multi-channel complex signals by using a motion signal synthesis vector corresponding to at least one target motion signal, at least one target motion complex signal with interference removed, wherein the motion signal synthesis vector corresponding to the at least one target motion signal is acquired by:
acquiring, during a specified period of the magnetic resonance scanning, data received by the multiple local coils, wherein the data comprises data without radio frequency interference in a first specified sub-period before a radio frequency pulse sequence runs and data with radio frequency interference in a second specified sub-period when the radio frequency pulse sequence runs;
acquiring a radio frequency interference suppression matrix based on the data without radio frequency interference and the data with radio frequency interference, and acquiring radio frequency interference suppression data based on the data without radio frequency interference or the data with radio frequency interference and the radio frequency interference suppression matrix;
acquiring a motion signal correlation matrix of the at least one target motion signal in frequency domain based on the radio frequency interference suppression data and a frequency range of the at least one target motion signal; and
using, as the motion signal synthesis vector, an eigenvector acquired according to an eigenvalue of the motion signal correlation matrix; and
outputting the at least one target motion complex signal for use in magnetic resonance image acquisition timing or motion correction.