JPH01164356A - Apparatus for generating uniform magnetic field - Google Patents

Apparatus for generating uniform magnetic field

Info

Publication number
JPH01164356A
JPH01164356A JP62322729A JP32272987A JPH01164356A JP H01164356 A JPH01164356 A JP H01164356A JP 62322729 A JP62322729 A JP 62322729A JP 32272987 A JP32272987 A JP 32272987A JP H01164356 A JPH01164356 A JP H01164356A
Authority
JP
Japan
Prior art keywords
magnetic
opposed
uniformity
pole pieces
permeability
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62322729A
Other languages
Japanese (ja)
Inventor
Mitsuhito Yamaguchi
Takeshi Ueda
Original Assignee
Asahi Chem Ind Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Chem Ind Co Ltd filed Critical Asahi Chem Ind Co Ltd
Priority to JP62322729A priority Critical patent/JPH01164356A/en
Publication of JPH01164356A publication Critical patent/JPH01164356A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve the uniformity of the magnetic field of a yoke type magnetic field generating apparatus and to easily control said magnetic field within a short time, by mounting holding plates having permanent magnetic small pieces for controlling a magnetic field arranged and fixed thereto and arranging said plates in relation to opposed permanent magnets.
CONSTITUTION: Pole pieces 2 composed of a high permeability material such as soft iron are fixed to one ends of a pair of disc-shaped permanent magnets 1 to be opposed to each other and the other ends thereof are connected by yokes 3 composed of a high permeability material such as soft iron to generate a magnetic field in the gap 4 between the pole pieces 2. A human body is introduced into said gap partially or entirely to perform diagnosis. Annular projections having an almost triangular shape composed of a predetermined inner diameter and a predetermined height are provided to the peripheral edge of the opposed surfaces thereof. Further, holding plates 7 having permanent magnet small pieces 6 arranged thereto are provided to the recessed parts of the opposed surfaces of the pole pieces. As a result, dimension can be also reduced and this apparatus can cope with not only lower order non-uniformity but also higher order non-uniformity.
COPYRIGHT: (C)1989,JPO&Japio
JP62322729A 1987-12-22 1987-12-22 Apparatus for generating uniform magnetic field Pending JPH01164356A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62322729A JPH01164356A (en) 1987-12-22 1987-12-22 Apparatus for generating uniform magnetic field

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62322729A JPH01164356A (en) 1987-12-22 1987-12-22 Apparatus for generating uniform magnetic field

Publications (1)

Publication Number Publication Date
JPH01164356A true JPH01164356A (en) 1989-06-28

Family

ID=18146970

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62322729A Pending JPH01164356A (en) 1987-12-22 1987-12-22 Apparatus for generating uniform magnetic field

Country Status (1)

Country Link
JP (1) JPH01164356A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0383903U (en) * 1989-12-13 1991-08-26
WO1999033397A1 (en) * 1996-08-26 1999-07-08 Sumitomo Special Metals Co., Ltd. Mri magnetic field generator
US6933820B2 (en) 2003-12-10 2005-08-23 Shin-Etsu Chemical Co., Ltd. Magnetic circuit with opposing permanent magnets and method for adjusting magnetic field thereof
WO2009136643A1 (en) * 2008-05-09 2009-11-12 株式会社日立製作所 Magnetic field adjustment for mri apparatus
WO2009136642A1 (en) * 2008-05-09 2009-11-12 株式会社日立製作所 Software for adjusting magnetic homogeneity, method for adjusting magnetic homogeneity, magnet device, and magnetic resonance imaging device
ITGE20100008A1 (en) * 2010-01-22 2011-07-23 Esaote Spa MACHINE FOR NUCLEAR MAGNETIC RESONANCE WITH MEANS OF CORRECTION OF THE MAGNETIC FIELD HOMOGENEITY

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0383903U (en) * 1989-12-13 1991-08-26
WO1999033397A1 (en) * 1996-08-26 1999-07-08 Sumitomo Special Metals Co., Ltd. Mri magnetic field generator
US6275128B1 (en) 1997-12-26 2001-08-14 Sumitomo Special Metals Co., Ltd. MRI magnetic field generator
KR100373577B1 (en) * 1997-12-26 2003-02-26 스미토모 도큐슈 긴조쿠 가부시키가이샤 Mri magnetic field generator
US6933820B2 (en) 2003-12-10 2005-08-23 Shin-Etsu Chemical Co., Ltd. Magnetic circuit with opposing permanent magnets and method for adjusting magnetic field thereof
JP2009268791A (en) * 2008-05-09 2009-11-19 Hitachi Ltd Software for adjusting magnetic homogeneity, magnetic homogeneity adjustment method, magnet device and magnetic resonance imaging apparatus
WO2009136642A1 (en) * 2008-05-09 2009-11-12 株式会社日立製作所 Software for adjusting magnetic homogeneity, method for adjusting magnetic homogeneity, magnet device, and magnetic resonance imaging device
WO2009136643A1 (en) * 2008-05-09 2009-11-12 株式会社日立製作所 Magnetic field adjustment for mri apparatus
US8947089B2 (en) 2008-05-09 2015-02-03 Hitachi, Ltd. Magnetic field shimming adjustment: reducing magnetic distribution errors by obtaining current potential distributions of MRI apparatus
JP2012101105A (en) * 2008-05-09 2012-05-31 Hitachi Ltd Magnetic field adjustment for mri apparatus
JP4902787B2 (en) * 2008-05-09 2012-03-21 株式会社日立製作所 Magnetic field adjustment for MRI equipment
WO2011089115A1 (en) * 2010-01-22 2011-07-28 Esaote S.P.A. Magnetic resonance imaging apparatus with means for correcting magnetic field homogeneity
ITGE20100008A1 (en) * 2010-01-22 2011-07-23 Esaote Spa MACHINE FOR NUCLEAR MAGNETIC RESONANCE WITH MEANS OF CORRECTION OF THE MAGNETIC FIELD HOMOGENEITY
US9188652B2 (en) 2010-01-22 2015-11-17 Esaote S.P.A. Magnetic resonance imaging apparatus with means for correcting magnetic field homogeneity

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