Main magnetic field homogenization method and device of magnetic resonance scanner and medium
A main magnetic field and scanner technology, applied in the field of magnetic resonance scanner's main magnetic field homogenization method, equipment and computer-readable storage media, can solve the problems of long time for main magnetic field homogenization, and achieve shortening of main magnetic field homogenization the effect of time
Active Publication Date: 2019-12-24
SHANGHAI UNITED IMAGING HEALTHCARE
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[0005] Embodiments of the present invention provide a method, device, and computer-readable storage medium for homogenizing the main magnetic field of a magnetic resonance scanner, so as to at least solve the problem of magnetic resonance in the related art. The problem of long time for the homogenization of the main magnetic field of the scanner
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[0028] In this embodiment, a method for homogenizing the main magnetic field of a magnetic resonance scanner is provided. figure 1 It is a flowchart of a method for homogenizing the main magnetic field of a magnetic resonance scanner according to an embodiment of the present invention, such as figure 1 As shown, the process includes the following steps:
[0029] Step S101, acquiring a magnetic resonance image of the scanned object;
[0030] In this embodiment, the magnetic resonance image is the image acquired by the magnetic resonance sequence of the magnetic resonance scanner or the image obtained by digital processing according to the image acquired by the magnetic resonance sequence, including the magnetic resonance phase image, the magnetic resonance amplitude images and MRI magnetic field distribution images. Specifically, the magnetic resonance image can be obtained by dual gradient echo magnetic resonance sequence, fast echo planar acquisition or helical acquisition ...
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The invention relates to a main magnetic field homogenization method and device of a magnetic resonance scanner and a medium. The method comprises the following steps of acquiring a magnetic resonanceimage of a scanned object; preprocessing the magnetic resonance image; inputting the preprocessed magnetic resonance image into a completely trained first neural network; obtaining a prediction maskgraph outputted by the completely trained first neural network, the prediction mask graph being used for dividing a region of interest in the magnetic resonance image; and performing the magnetic field homogenization processing on the main magnetic field of the magnetic resonance scanner according to the region of interest. According to the invention, the problem of long homogenization time of themain magnetic field of the magnetic resonance scanner is solved, and the homogenization time of the main magnetic field of the magnetic resonance scanner is shortened.
Description
technical field [0001] The present invention relates to the field of magnetic resonance, in particular to a method, device and computer-readable storage medium for homogenizing the main magnetic field of a magnetic resonance scanner. Background technique [0002] Most magnetic resonance examination (Magnetic Resonance, MR for short) techniques, especially echo planar imaging and steady-state free precession, benefit from a relatively uniform magnetic field. For the human brain, the most pronounced magnetic field inhomogeneities occur around the sinuses and ear holes due to the high magnetic susceptibility difference between air and tissue. The inhomogeneity of the magnetic field in these regions leads to important image artifacts such as signal loss and image distortion. For ultra-high field magnetic resonance imaging (Magnetic Resonance Imaging, referred to as MRI), because the non-uniformity of the field strength expands with the increase of the background field strength....
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Login to View More IPC IPC(8): G06T11/00G06T3/40G06N3/08G06N3/04
CPCG06T11/008G06T3/4053G06N3/08G06T2207/10088G06T2207/20104G06N3/045G01R33/3875G01R33/5608G01R33/243A61B5/055G01R33/24G01R33/32
Inventor 史宇航
Owner SHANGHAI UNITED IMAGING HEALTHCARE