[특허]Open access superconducting MRI magnet

Open access superconducting MRI magnet 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H01F-007/22 G01V-003/00
출원번호	US-0259914 (1994-06-10)
발명자 / 주소	Breneman Bruce C. (San Diego CA) Sarwinski Raymond E. (San Diego CA) Hsu Yen-Hwa L. (Solana Beach CA)
출원인 / 주소	Applied Superconetics, Inc. (San Diego CA 02)
인용정보	피인용 횟수 : 72 인용 특허 : 0

초록 ▼

An open access MRI magnet includes a ferromagnetic frame open on at least two sides and having upper and lower end plates and at least two support columns. A superconducting coil assembly is mounted to each end plate for generating a magnetic flux field in a patient receiving area located between the end plates. Each superconducting coil assembly includes a toroidal vacuum tight vessel, insulation, and one or more temperature shields mounted within the vacuum tight vessel. One or more coils of superconducting wire is wound within the vacuum vessel, and is coupled to a power source and to a persistent switch for maintaining a constant flow of current with no power consumption. A return path for the flux is provided by the end plates and support posts of the frame. The superconducting coils, the thermal shields, and the persistent switch are cooled by a cryocooler, by means of conduction through solid thermal conductors or by a combination of conduction and convection, through a fluid cooling circuit, without the consumption of a liquid cryogen.

대표청구항 ▼

An open access magnetic resonance imaging apparatus, comprising: a substantially open ferromagnetic frame including an upper end plate and a lower end plate mounted horizontally, spaced apart, and generally parallel to one another on at least one support column, to define a patient receiving area therebetween accessible to additional medical equipment and personnel; first and second toroidal shaped coils of superconducting wire mounted to said upper and lower end plates, respectively, for generating a magnetic flux field along a vertical polar axis, with a return path for said magnetic flux field provided by said support column and by said upper and lower end plates, said superconducting wire having a low transition temperature; magnetic flux shaping means mounted to each said end plate for shaping said flux field to provide generally parallel lines of magnetic flux within said patient receiving area, said flux shaping means including a rose shim mounted to each said end plate; a cryocooler; and first and second solid thermal conductors attached to said cryocooler, said first and second solid thermal conductors being mounted in thermally conductive contact with said first and second superconducting coils, respectively, for cooling said superconducting coils by conductive heat transfer, to maintain said superconducting coils at a temperature below said low transition temperature of said superconducting wire.

이 특허를 인용한 특허 (72)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Open access superconducting MRI magnet 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

이 특허를 인용한 특허 (72)

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연합인증

Open access superconducting MRI magnet 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

전체(0) 논문(0) 특허(0) 보고서(0)

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이 특허를 인용한 특허 (72)

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