Method and device for removing interference in signals, magnetic resonance system and storage medium
A technology without interference and motion signals, applied in the directions of using nuclear magnetic resonance imaging system for measurement, magnetic resonance measurement, and measurement of magnetic variables, etc., can solve the problems that breathing motion can no longer be accurately represented, and cannot be regarded as breathing navigation signals, etc.
Pending Publication Date: 2021-02-26
SIEMENS SHENZHEN MAGNETIC RESONANCE
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It can be seen that this distorted signal can no longer accurately represent respiratory motion and therefore cannot be considered as a respiratory navigation signal
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[0048]In the embodiment of the present invention, considering that for the same signal, when using multiple channels to simultaneously collect the same signal, the signals collected by these multiple channels must be strongly correlated. From the perspective of matrix analysis, multiple The signals collected by the channel can form an omnidirectional feature space, and most of the energy of the signal is distributed on a small number of feature vectors, such as one or two feature vectors. Therefore, in the embodiment of the present invention, a strong interference signal can be obtained by using the interference signal and the non-interference signal of a target motion signal, and the eigenvector decomposition is performed on the strong interference matrix formed by the strong interference signal, then the eigenvector with the largest energy is located in The direction of is the interference feature direction. By removing the eigenvectors in this direction, an interference supp...
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The embodiment of the invention discloses a method and device for removing interference in signals, a magnetic resonance system and a storage medium. The method comprises the steps of carrying out interference elimination on a target motion signal received by a plurality of channels through employing a current interference suppression matrix to obtain a target motion navigation signal, wherein thecurrent interference suppression matrix is obtained by the following method: aiming at the target motion signal, data received by a plurality of channels in a set time period is obtained, and the data comprises non-interference data of a first set sub-time period and interference data of a second set sub-time period; the non-interference data of the first set sub-time period and the interferencedata of the second set sub-time period are utilized to obtain interference data in a corresponding time period, and an interference matrix is formed; and eigenvalue and eigenvector decomposition is carried out on the interference matrix, and an eigenvector with the maximum energy is removed to generate a current interference suppression matrix. According to the technical scheme in the embodiment of the invention, the target motion navigation signal required by scanning navigation can be reproduced.
Description
technical field [0001] The invention relates to the technical field of magnetic resonance imaging, in particular to a method and device for removing interference in target motion signals, a magnetic resonance imaging system, and a computer-readable storage medium. Background technique [0002] Magnetic resonance imaging (MRI) is a technique that uses magnetic resonance phenomena for imaging. The principle of magnetic resonance imaging mainly includes: atomic nuclei containing a single number of protons, such as hydrogen nuclei widely present in the human body, the protons have spin motion, just like a small magnet, and the spin axes of these small magnets have no certain rules. External magnetic field, these small magnets will be rearranged according to the magnetic force lines of the external magnetic field, specifically in two directions parallel to or antiparallel to the magnetic force lines of the external magnetic field, and the above-mentioned direction parallel to the...
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Login to View More IPC IPC(8): G01R33/54A61B5/055
CPCG01R33/54A61B5/055
Inventor 黄艳图张秋艺李志宾
Owner SIEMENS SHENZHEN MAGNETIC RESONANCE