- 专利标题： Method for correcting inhomogeneity of the static magnetic field particularly of the static magnetic field generated by the magnetic structure of a machine for acquiring nuclear magnetic resonance images and MRI system for carrying out such method
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申请号： US17941629申请日： 2022-09-09
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公开(公告)号： US20230085309A1公开(公告)日： 2023-03-16
- 发明人: Vincenzo PUNZO
- 申请人： Esaote S.p.A.
- 申请人地址： IT Genova
- 专利权人： Esaote S.p.A.
- 当前专利权人： Esaote S.p.A.
- 当前专利权人地址： IT Genova
- 优先权： EP21195929.1 20210910
- 主分类号： G01R33/3873
- IPC分类号： G01R33/3873
摘要：
Method for shimming a magnetic field which is generated by a magnetic structure, and which permeates a volume of space uses the following steps: measuring the magnetic field in a region of a volume of space permeated by the said magnetic field; determining a parameter which is a measure of the homogeneity of the magnetic field; defining a distribution of correction elements including a predetermined number of magnetic dipoles each having a predetermined magnetic charge and a predetermined position relatively to the magnetic structure generating the magnetic field; calculating the charges of each of the dipoles and the position of each of the dipoles of a distribution which minimizes the parameter being a measure of the homogeneity of the magnetic field; using the distribution of dipoles as the shimming distribution of dipoles to be positioned on the magnetic structure.
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