The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 8996083 B1

Date of Patent:

Mar. 31, 2015

Filed:

Dec. 14, 2011

Self-shield open magnetic resonance imaging superconducting magnet

Applicants:

Qiuliang Wang, Beijing, CN;

Xinning HU, Beijing, CN;

Chunzhong Wang, Beijing, CN;

Hui Wang, Beijing, CN;

Luguang Yan, Beijing, CN;

Yinming Dai, Beijing, CN;

Baozhi Zhao, Beijing, CN;

Jianhua Wang, Beijing, CN;

Jianyi Xu, Beijing, CN;

Inventors:

Qiuliang Wang, Beijing, CN;

Xinning Hu, Beijing, CN;

Chunzhong Wang, Beijing, CN;

Hui Wang, Beijing, CN;

Luguang Yan, Beijing, CN;

Yinming Dai, Beijing, CN;

Baozhi Zhao, Beijing, CN;

Jianhua Wang, Beijing, CN;

Jianyi Xu, Beijing, CN;

Assignee:

Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, CN;

Attorney:

Primary Examiner:

Colleen Dunn

Int. Cl.

CPC ...

G01R 33/035 (2006.01); G01R 33/34 (2006.01); G01R 33/38 (2006.01); G01R 33/3815 (2006.01); H01F 6/06 (2006.01); G01R 33/421 (2006.01);

U.S. Cl.

CPC ...

G01R 33/34023 (2013.01); G01R 33/3806 (2013.01); G01R 33/3815 (2013.01); H01F 6/06 (2013.01); G01R 33/421 (2013.01);

Abstract

A self-shield open magnetic resonance imaging superconducting magnet comprises five pairs of coils: shim coils, first main magnetic coils, second main magnetic coils, third main magnetic coils, and shielding coils. The five pairs of coils are symmetric about the center. The shim coils are arranged closest to the center point; the first main magnetic coils, the second main magnetic coils, the third main magnetic coils, and the shielding coils are arranged in sequence outside. The first main magnetic coils are connected with reverse current. The second and third main magnetic coils are connected with positive current for providing the main magnetic field strength. The shim coils are connected with positive current for compensating the magnetic field in the central region. The shielding coils are connected with reverse current for creating a magnetic field opposite to the main magnetic field for compensating the stray magnetic field in the space.

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