[특허]Superconducting magnet system for head imaging

Superconducting magnet system for head imaging 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H01F-005/00 H01F-006/04 G01R-033/38 G01R-033/3815 H01F-006/06
출원번호	US-0759261 (2013-08-19)
등록번호	US-9666344 (2017-05-30)
우선권정보	CN-2013 1 0003130 (2013-01-06)
국제출원번호	PCT/CN2013/081715 (2013-08-19)
국제공개번호	WO2014/106386 (2014-07-10)
발명자 / 주소	Wang, Qiuliang Hu, Xinning Ni, Zhipeng Li, Lankai Yan, Luguang Li, Yi Dai, Yinming
출원인 / 주소	Institute of Electrical Engineering, Chinese Academy of Sciences
대리인 / 주소	The Webb Law Firm
인용정보	피인용 횟수 : 0 인용 특허 : 22

초록 ▼

A superconducting magnet system for head imaging is disclosed which includes a cryocooler, a high-pressure helium container, a self-excitation heat pipe and a superconducting magnet. A second stage coldhead of the cryocooler is connected to the high-pressure helium container for converting the helium gas in the high-pressure helium container into liquid helium. The self-excitation heat pipe forms a closed cooling loop, and liquid helium in the high-pressure helium container flows circularly in the self-excitation heat pipe. The self-excitation heat pipe cools the superconducting magnet, wherein part of the liquid helium in the self-excitation heat pipe is converted into the helium gas due to the heat disturbance generated by the superconducting magnet, and the helium gas interacts with the liquid helium to generate liquid helium vibration.

대표청구항 ▼

1. A superconducting magnet system for head imaging, comprising a cryocooler (1), a high-pressure helium container (2), a self-excitation heat pipe (3) and a superconducting magnet (4), wherein: the second stage coldhead of the cryocooler (1) is connected to the high-pressure helium container (2) for converting the helium gas in the high-pressure helium container (2) into liquid helium;two ends of the self-excitation heat pipe (3) are connected respectively to the high-pressure helium container (2) to form a closed cooling loop, so that the liquid helium in the high-pressure helium container (2) circulates in the self-excitation heat pipe (3);the self-excitation heat pipe (3) is wrapped uniformly around the outer surface of the superconducting magnet (4) to cool the superconducting magnet (4);wherein the helium gas interacts with the liquid helium to generate liquid helium vibration when a part of the liquid helium in the self-excitation heat pipe (3) is converted into helium gas due to heat disturbance generated by the superconducting magnet (4);wherein, in the superconducting magnet (4):a first main magnetic field superconducting coil (41) is disposed at a first end of the inner side of the superconducting magnet (4), a third main magnetic field superconducting coil (43) is disposed at a second end of the inner side of the superconducting magnet (4), and a corresponding area between the first main magnetic field superconducting coil (41) and the third main magnetic field superconducting coil (43) is an imaging area (5);on the outer layer of the first main magnetic field superconducting coil (41), in the direction from the center of the superconducting magnet (4) to the first end, a sixth compensation superconducting coil (56), a seventh compensation superconducting coil (57) and a second main magnetic field superconducting coil (42) are arranged in sequence; on the outer layer of the second main magnetic field superconducting coil (42), in the direction from the center of the superconducting magnet (4) to the first end, a first compensation superconducting coil (51) and a second compensation superconducting coil (52) are arranged in sequence;on the outer layer of a fourth main magnetic field superconducting coil (44), in the direction from the center of the superconducting magnet (4) to the second end, a third compensation superconducting coil (53) and a fourth compensation superconducting coil (54) are arranged in sequence, and a fifth compensation superconducting coil (55) is arranged on the inner layer of the third main magnetic field superconducting coil (43). 2. The superconducting magnet system according to claim 1, wherein: the diameter of the self-excitation heat pipe (3) is less than 1 mm. 3. The superconducting magnet system according to claim 1, wherein: helium gas with 3-5 atm is encapsulated in the self-excitation heat pipe (3). 4. The superconducting magnet system according to claim 1, wherein: the ratio between the radii of the third main magnetic field superconducting coil (43) and the first main magnetic field superconducting coil (41) is in a range of 1.3-1.35. 5. The superconducting magnet system according to claim 1, wherein: the material of the first main magnetic field superconducting coil (41) and the third main magnetic field superconducting coil (43) is Nb3Sn, and the material of the second main magnetic field superconducting coil (42) and the fourth main magnetic field superconducting coil (44) is NbTi. 6. The superconducting magnet system according to claim 1, wherein: the material of the first compensation superconducting coil (51) to the seventh compensation superconducting coil (57) is NbTi.

이 특허에 인용된 특허 (22)

Stautner, Ernst Wolfgang, Apparatus and method for cooling a superconducting magnetic assembly.
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Crozier Stuart,AUX ; Doddrell David M.,AUX ; Zhao Huawei,AUX, Assymetric superconducting magnets for magnetic resonance imaging.
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Ohkura Kengo,JPX ; Sato Kenichi,JPX, Cooling method and energizing method of superconductor.
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Chen William E. (Florence SC), Cryogen recondensing superconducting magnet.
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Radovinsky, Alexey L.; Zhukovsky, Alexander, Cryogenic vacuum break thermal coupler with cross-axial actuation.
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Kruip, Marcel Jan Marie; Oomen, Marijn Pieter; Van Hasselt, Peter, Device for generating a pulsed magnetic field.
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Hofmann,Albert, Device for the recondensation, by means of a cryogenerator, of low-boiling gases evaporating from a liquid gas container.
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Huang,Xianrui; Aksel,Bulent; Amm,Kathleen M.; Laskaris,Evangelos T.; Stautner,Ernst W.; Thompson,Paul S.; Wu,Anbo; Xu,Minfeng; Zhao,Yan, Heat pipe cooled superconducting magnets with ceramic coil forms.
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Eckels Phillip William, Helium recondensing magnetic resonance imager superconducting shield.
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Huang,Xianrui; Xu,Minfeng; Laskaris,Evangelos Trifon; Thompson,Paul St. Mark Shadforth; Aksel,Bulent; Amm,Kathleen Melanie; Wu,Anbo; Zhao,Yan, Magnet assembly for magnetic resonance imaging system.
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Eckels Phillip William (Florence SC) Sato Kazuhiko (Ishikawa-machi JPX) Woods Daniel Christian (Florence SC) Ward Granville Geer (Florence SC) Hayworth Gregory Farin (Florence SC) King Christopher G., Magnetic resonance imager with helium recondensing.
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Jonas, Philip A.; Hintz, Ronald E.; Pfleiderer, Glen G., Method of using a system including an assembly exposed to a cryogenic region.
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Nagao Masashi (Amagasaki JPX) Yoshimura Hideto (Amagasaki JPX) Inaguchi Takashi (Amagasaki JPX), Multi-stage cold accumulation type refrigerator and cooling device including the same.
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Xu Hao ; Conolly Steven ; Hu Bob S., Short bore-length asymmetric electromagnets for magnetic resonance imaging.
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Takano Ichiro (Zama JPX) Ohguma Hirotsugu (Kawasaki JPX) Nakagome Hideki (Yokohama JPX) Gomei Yoshio (Yokohama JPX), Superconducting apparatus.
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Eckels Phillip William ; Hackett Richard Thomas ; Hayworth Gregory F. ; Huang Xianrui ; Ginfrida Clifford J. ; Lehmann Gregory Alan ; Scaturro ; Jr. John ; Xu Bu-Xin, Superconducting magnet split cryostat interconnect assembly.
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Wang, Qiuliang; Dai, Yinming; Zhao, Baozhi; Hu, Xinning; Yan, Luguang; Wang, Housheng; Chen, Shunzhong, Superconducting magnet system for nuclear magnetic resonance with high magnetic field and high degree of homogeneity of magnetic field.
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Harrison, Stephen M, Superconductive electromagnet apparatus and cooling apparatus and method thereof.
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Jiang,Longzhi; Lehmann,Gregory Alan; Legall,Edwin Lawrence, Superconductive magnet including a cryocooler coldhead.
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Laskaris Evangelos T. (Schenectady NY), Superconductive magnetic resonance magnet without cryogens.
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Xu In-Hua ; Woods Daniel C. ; Stogner William S., Thermal conductance gasket for zero boiloff superconducting magnet.
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Brockenborough William E. ; Gamble Bruce Barton ; Rodenbush Anthony J. ; Sidi-Yekhlef Ahmed, Thermally shielded superconductor current lead.
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