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CRYOGENIC FIELD SENSING FOR COMPENSATING MAGNETIC FIELD VARIATIONS IN MAGNETIC RESONANCE IMAGING MAGNETS

机译：用于补偿磁共振成像磁体中磁场变化的低温场感测

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摘要

A superconducting magnet includes superconducting magnet coils (C₁, C₂, C₃, C₄, C₅, C₆, S₁, S₂) disposed inside a magnet cryostat (12). The superconducting magnet coils generate a static (B₀) magnetic field when an electric current flows in the superconducting magnet coils. A superconducting B₀compensation circuit (30, 60, 70) is also disposed inside the magnet cryostat, and is coupled with the superconducting magnet coils to passively reduce temporal variations in the B₀magnetic field generated by the superconducting magnet coils. An electric current sensor (40) is also disposed inside the magnet cryostat and is connected to measure electric current flowing in the superconducting B₀compensation circuit. An active B₀compensation component (50) is operatively connected with the electric current sensor to receive the measurement of electric current flowing in the superconducting B₀compensation circuit and to provide active B₀magnetic field compensation based on the measured electric current.

机译：超导磁体包括超导磁体线圈（C _{1 ，C _{2 ，C _{3 ，C _{4 ，C < Sub> 5 ，C _{6 ，S _{1 ，S _{2 ）置于磁体低温恒温器（ 12 ）。当电流在超导磁体线圈中流动时，超导磁体线圈会产生静态（B _{0 ）磁场。超导B _{0 补偿电路（ 30、60、70 ）也置于磁体低温恒温器内部，并与超导磁体线圈耦合，以被动地减小传感器中的时间变化。超导磁体线圈产生的B _{0 磁场。电流传感器（ 40 ）也设置在磁体低温恒温器的内部，并连接以测量在超导B _{0 补偿电路中流动的电流。有源B _{0 补偿组件（ 50 ）与电流传感器可操作地连接，以接收在超导B _{0 补偿电路并根据测得的电流提供有源B _{0 磁场补偿。}}}}}}}}}}}}}} 展开▼

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公开/公告号US2019154777A1

专利类型

公开/公告日2019-05-23

原文格式PDF

申请/专利权人 KONINKLIJKE PHILIPS N.V.;
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申请/专利号US201716305946

发明设计人 GERARDUS BERNARDUS JOZEF MULDER;CORNELIS LEONARDUS GERARDUS HAM;
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申请日2017-06-05

分类号G01R33/389;H01F6;G01R33/3815;G01R33/421;

国家 US

入库时间 2022-08-21 12:08:54

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1. 用于补偿磁共振成像磁体中的磁场变化的低温场感测 [P] . 中国专利： CN109313245A . 2019-02-05

2. 用于补偿磁场感测器装置传输系数的变化的电路装置和方法 [P] . 中国专利： CN100385243C . 2008.04.30

3. Cryogenic field sensing for compensating magnetic field variations in magnetic resonance imaging magnets [P] . 美国专利： US10761163B2 . 2020-09-01

机译：低温场感测，用于补偿磁共振成像磁体中的磁场变化

4. CRYOGENIC FIELD SENSING FOR COMPENSATING MAGNETIC FIELD VARIATIONS IN MAGNETIC RESONANCE IMAGING MAGNETS [P] . 欧洲知识产权局专利： EP3465245A1 . 2019-04-10

机译：用于补偿磁共振成像磁体中磁场变化的低温场感测

5. CRYOGENIC FIELD SENSING FOR COMPENSATING MAGNETIC FIELD VARIATIONS IN MAGNETIC RESONANCE IMAGING MAGNETS [P] . 世界知识产权组织专利： WO2017211756A1 . 2017-12-14

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