CA2075609A1 - Biomedical magnetism imaging apparatus and method - Google Patents

Biomedical magnetism imaging apparatus and method

Info

Publication number
CA2075609A1
CA2075609A1 CA2075609A CA2075609A CA2075609A1 CA 2075609 A1 CA2075609 A1 CA 2075609A1 CA 2075609 A CA2075609 A CA 2075609A CA 2075609 A CA2075609 A CA 2075609A CA 2075609 A1 CA2075609 A1 CA 2075609A1
Authority
CA
Canada
Prior art keywords
grid
signal processor
current sources
biomagnetic
sensing signals
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.)
Granted
Application number
CA2075609A
Other languages
French (fr)
Other versions
CA2075609C (en
Inventor
Roman B. Kuc
James J. Szinger
Takehiko Hayashi
Takao Goto
Yoshiyasu Nakashima
Takaki Shimura
Kenji Kawabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Yale University
Original Assignee
Roman B. Kuc
James J. Szinger
Takehiko Hayashi
Takao Goto
Yoshiyasu Nakashima
Takaki Shimura
Kenji Kawabe
Yale University
Fujitsu Limited
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 Roman B. Kuc, James J. Szinger, Takehiko Hayashi, Takao Goto, Yoshiyasu Nakashima, Takaki Shimura, Kenji Kawabe, Yale University, Fujitsu Limited filed Critical Roman B. Kuc
Publication of CA2075609A1 publication Critical patent/CA2075609A1/en
Application granted granted Critical
Publication of CA2075609C publication Critical patent/CA2075609C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/242—Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medical Informatics (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Molecular Biology (AREA)
  • General Physics & Mathematics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Medical Treatment And Welfare Office Work (AREA)
  • Image Processing (AREA)
  • Image Analysis (AREA)

Abstract

A method and apparatus for performing biomagnetic imaging to determine the location and intensity of current sources within a subject includes a sensor unit for sensing the magnetic field within the subject and for providing sensing signals. A signal processor defines a grid having multiple grid points and performs inverse estimation to determine the distribution of current sources on the defined grid based on the sensing signals. The signal processor then modifies the grid to improve the resolution of the current sources distributed on the grid. A control unit controls the operation of the signal processor and processes image data to provide magnified and non-magnified displays on a display unit. The biomagnetic imaging method and apparatus can be combined with a system for providing magnetic resonance imaging data so as to produce a superimposed display including an MRI image and a biomagnetic image.
CA002075609A 1991-08-09 1992-08-07 Biomedical magnetism imaging apparatus and method Expired - Lifetime CA2075609C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/743,065 US5594849A (en) 1991-08-09 1991-08-09 Biomedical magnetism imaging apparatus and method
US07/743,065 1991-08-09

Publications (2)

Publication Number Publication Date
CA2075609A1 true CA2075609A1 (en) 1993-02-10
CA2075609C CA2075609C (en) 1999-07-06

Family

ID=24987384

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002075609A Expired - Lifetime CA2075609C (en) 1991-08-09 1992-08-07 Biomedical magnetism imaging apparatus and method

Country Status (4)

Country Link
US (1) US5594849A (en)
JP (1) JP3231847B2 (en)
CA (1) CA2075609C (en)
DE (1) DE4218563C2 (en)

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JP4027867B2 (en) * 2003-09-10 2007-12-26 株式会社日立ハイテクノロジーズ Biomagnetic field measurement device
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Also Published As

Publication number Publication date
US5594849A (en) 1997-01-14
DE4218563A1 (en) 1993-02-11
JPH05197767A (en) 1993-08-06
DE4218563C2 (en) 1998-07-16
JP3231847B2 (en) 2001-11-26
CA2075609C (en) 1999-07-06

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