CA2223748A1 - Method and system for obtaining higher order gradiometer measurements with lower order gradiometer - Google Patents
Method and system for obtaining higher order gradiometer measurements with lower order gradiometerInfo
- Publication number
- CA2223748A1 CA2223748A1 CA002223748A CA2223748A CA2223748A1 CA 2223748 A1 CA2223748 A1 CA 2223748A1 CA 002223748 A CA002223748 A CA 002223748A CA 2223748 A CA2223748 A CA 2223748A CA 2223748 A1 CA2223748 A1 CA 2223748A1
- Authority
- CA
- Canada
- Prior art keywords
- gradiometer
- order gradiometer
- measurements
- higher order
- obtaining higher
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/022—Measuring gradient
Abstract
A method and system of obtaining magnetic measurements with a preselected order of sensor gradiometer which are substantially equivalent to those which would be obtained with a sensor gradiometer of a higher order. The system and method employs a reference system comprising a reference tensor gradiometer and appropriate components of a measured tensor are combined with the measurements obtained from the sensor gradiometer to obtain a magnetic measurement substantially equivalent to that which would have been measured by a higher order sensor gradiometer.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/476,290 US5657756A (en) | 1995-06-07 | 1995-06-07 | Method and systems for obtaining higher order gradiometer measurements with lower order gradiometers |
US08/476,290 | 1995-06-07 | ||
PCT/CA1996/000393 WO1996041209A1 (en) | 1995-06-07 | 1996-06-07 | Method and system for obtaining higher order gradiometer measurements with lower order gradiometer |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2223748A1 true CA2223748A1 (en) | 1996-12-19 |
CA2223748C CA2223748C (en) | 2002-09-24 |
Family
ID=23891258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002223748A Expired - Fee Related CA2223748C (en) | 1995-06-07 | 1996-06-07 | Method and system for obtaining higher order gradiometer measurements with lower order gradiometer |
Country Status (7)
Country | Link |
---|---|
US (1) | US5657756A (en) |
EP (1) | EP0830612B1 (en) |
JP (1) | JPH11506198A (en) |
AU (1) | AU6117296A (en) |
CA (1) | CA2223748C (en) |
DE (1) | DE69632583T2 (en) |
WO (1) | WO1996041209A1 (en) |
Families Citing this family (44)
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US7092352B2 (en) * | 1993-07-23 | 2006-08-15 | Aquity, Llc | Cancellation systems for multicarrier transceiver arrays |
JP3194695B2 (en) * | 1995-12-14 | 2001-07-30 | 学校法人金沢工業大学 | Magnetic measuring device, method of assembling and repairing the same, and diagnostic device for magnetic measurement |
JP3237590B2 (en) * | 1997-10-24 | 2001-12-10 | 株式会社日立製作所 | Magnetic field measurement device |
US6842637B2 (en) * | 1997-10-24 | 2005-01-11 | Hitachi, Ltd. | Magnetic field measurement apparatus |
WO1999037206A1 (en) | 1998-01-23 | 1999-07-29 | Ctf Systems Inc. | System and method for measuring, estimating and displaying rms current density maps |
FI112399B (en) * | 1998-08-28 | 2003-11-28 | Neuromag Oy | Method and apparatus for eliminating background noise from multichannel detector devices |
US6267953B1 (en) | 1999-05-04 | 2001-07-31 | The United States Of America As Represented By The Secretary Of Agriculture | Chemical composition that attract arthropods |
JP3379488B2 (en) * | 1999-09-14 | 2003-02-24 | 株式会社日立製作所 | Magnetic field measurement device |
US7462366B2 (en) | 2002-03-29 | 2008-12-09 | Boston Scientific Scimed, Inc. | Drug delivery particle |
AU2003231992A1 (en) * | 2002-04-17 | 2003-11-03 | Board Of Trustees Of The University Of Arkansas | Uterine magnetomyography |
WO2003105917A2 (en) | 2002-06-12 | 2003-12-24 | Scimed Life Systems, Inc. | Bulking agents |
US7842377B2 (en) | 2003-08-08 | 2010-11-30 | Boston Scientific Scimed, Inc. | Porous polymeric particle comprising polyvinyl alcohol and having interior to surface porosity-gradient |
US8012454B2 (en) | 2002-08-30 | 2011-09-06 | Boston Scientific Scimed, Inc. | Embolization |
US7883490B2 (en) | 2002-10-23 | 2011-02-08 | Boston Scientific Scimed, Inc. | Mixing and delivery of therapeutic compositions |
FI115324B (en) | 2003-03-14 | 2005-04-15 | Elekta Neuromag Oy | A method and system for processing a multichannel measurement signal |
US7976823B2 (en) | 2003-08-29 | 2011-07-12 | Boston Scientific Scimed, Inc. | Ferromagnetic particles and methods |
US7736671B2 (en) | 2004-03-02 | 2010-06-15 | Boston Scientific Scimed, Inc. | Embolization |
US8173176B2 (en) | 2004-03-30 | 2012-05-08 | Boston Scientific Scimed, Inc. | Embolization |
US7311861B2 (en) | 2004-06-01 | 2007-12-25 | Boston Scientific Scimed, Inc. | Embolization |
US8425550B2 (en) | 2004-12-01 | 2013-04-23 | Boston Scientific Scimed, Inc. | Embolic coils |
US7727555B2 (en) | 2005-03-02 | 2010-06-01 | Boston Scientific Scimed, Inc. | Particles |
US7858183B2 (en) | 2005-03-02 | 2010-12-28 | Boston Scientific Scimed, Inc. | Particles |
US7963287B2 (en) | 2005-04-28 | 2011-06-21 | Boston Scientific Scimed, Inc. | Tissue-treatment methods |
GB2425610A (en) * | 2005-04-29 | 2006-11-01 | Univ London | Magnetic properties sensing system |
US9463426B2 (en) | 2005-06-24 | 2016-10-11 | Boston Scientific Scimed, Inc. | Methods and systems for coating particles |
US8007509B2 (en) | 2005-10-12 | 2011-08-30 | Boston Scientific Scimed, Inc. | Coil assemblies, components and methods |
US8101197B2 (en) | 2005-12-19 | 2012-01-24 | Stryker Corporation | Forming coils |
US8152839B2 (en) | 2005-12-19 | 2012-04-10 | Boston Scientific Scimed, Inc. | Embolic coils |
US7947368B2 (en) | 2005-12-21 | 2011-05-24 | Boston Scientific Scimed, Inc. | Block copolymer particles |
US8414927B2 (en) | 2006-11-03 | 2013-04-09 | Boston Scientific Scimed, Inc. | Cross-linked polymer particles |
JP2010187708A (en) * | 2008-01-10 | 2010-09-02 | Univ Of Tokushima | Jaw movement measuring device and method for manufacturing sensor coil for use in the same |
GB0900906D0 (en) * | 2009-01-20 | 2009-03-04 | Schlieffers Jorg | Removing or reducing the airwave in CSEM data by using weighted field differences |
US8593141B1 (en) | 2009-11-24 | 2013-11-26 | Hypres, Inc. | Magnetic resonance system and method employing a digital squid |
US9427186B2 (en) * | 2009-12-04 | 2016-08-30 | Endomagnetics Ltd. | Magnetic probe apparatus |
US10634741B2 (en) * | 2009-12-04 | 2020-04-28 | Endomagnetics Ltd. | Magnetic probe apparatus |
US8970217B1 (en) | 2010-04-14 | 2015-03-03 | Hypres, Inc. | System and method for noise reduction in magnetic resonance imaging |
US8314608B2 (en) | 2010-06-30 | 2012-11-20 | Hall David R | Method of determining distance to a ferrous material |
WO2012068493A1 (en) | 2010-11-18 | 2012-05-24 | Johns Hopkins University | Magnetoencephalography system and method for 3d localization and tracking of electrical activity in brain |
EP2968560B1 (en) | 2013-03-11 | 2020-04-29 | Endomagnetics Ltd. | Hypoosmotic solutions for lymph node detection |
US9239314B2 (en) | 2013-03-13 | 2016-01-19 | Endomagnetics Ltd. | Magnetic detector |
US9234877B2 (en) | 2013-03-13 | 2016-01-12 | Endomagnetics Ltd. | Magnetic detector |
US9671214B2 (en) * | 2013-07-17 | 2017-06-06 | Infineon Technologies Ag | Discrete magnetic angle sensor device, a magnetic angle sensor arrangement, a method for generating an angle signal and a method for providing a sensor signal |
US9245547B1 (en) * | 2015-02-19 | 2016-01-26 | Allegro Microsystems, Llc | Magnetic sensor having enhanced linearization |
AU2016272550B2 (en) | 2015-06-04 | 2021-01-28 | Endomagnetics Ltd. | Marker materials and forms for magnetic marker localization (MML) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3247585A1 (en) * | 1982-12-22 | 1984-06-28 | Siemens AG, 1000 Berlin und 8000 München | MULTI-CHANNEL DEVICE FOR MEASURING DIFFERENT FIELD SOURCES OF LOW MAGNETIC FIELDS |
US5026682A (en) * | 1987-04-13 | 1991-06-25 | International Business Machines Corporation | Devices using high Tc superconductors |
EP0359864B1 (en) * | 1988-09-23 | 1993-12-01 | Siemens Aktiengesellschaft | Apparatus and method for the measurement of weak magnetic fields dependent upon position and time |
US5311129A (en) * | 1990-02-02 | 1994-05-10 | Dornier Gmbh | Local magnetic field measurement apparatus having gradiometers arranged on non-parallel, non-orthogonal surfaces |
DE4005079A1 (en) * | 1990-02-17 | 1991-08-22 | Dornier Gmbh | Magnetic field gradient tensor measurement - uses five or more planar gradiometers on three or more non-parallel surfaces |
US5122744A (en) * | 1990-10-09 | 1992-06-16 | Ibm Corporation | Gradiometer having a magnetometer which cancels background magnetic field from other magnetometers |
GB2258314B (en) * | 1991-08-02 | 1995-07-19 | Dornier Gmbh | Device for measuring local magnetic field distributions |
JPH0542119A (en) * | 1991-08-12 | 1993-02-23 | Fujitsu Ltd | Biomagnetism measuring instrument |
US5187436A (en) * | 1992-03-13 | 1993-02-16 | General Electric Company | Noise cancellation method in a biomagnetic measurement system using an extrapolated reference measurement |
JP3204542B2 (en) * | 1992-07-24 | 2001-09-04 | 株式会社東芝 | Magnetic field source measurement device |
FI98337C (en) * | 1992-11-30 | 1997-06-10 | Risto Juhani Ilmoniemi | Method and apparatus for distinguishing between brain excitation responses and spontaneous function and different components of signals measured from the heart |
US5617856A (en) * | 1993-09-24 | 1997-04-08 | Osaka Gas Company Limited | Biological information-measuring apparatus |
US5471985A (en) * | 1994-08-01 | 1995-12-05 | Biomagnetic Technologies, Inc. | Biomagnetometer with whole head coverage of a seated or reclined subject |
-
1995
- 1995-06-07 US US08/476,290 patent/US5657756A/en not_active Expired - Lifetime
-
1996
- 1996-06-07 EP EP96918537A patent/EP0830612B1/en not_active Expired - Lifetime
- 1996-06-07 CA CA002223748A patent/CA2223748C/en not_active Expired - Fee Related
- 1996-06-07 WO PCT/CA1996/000393 patent/WO1996041209A1/en active IP Right Grant
- 1996-06-07 AU AU61172/96A patent/AU6117296A/en not_active Abandoned
- 1996-06-07 DE DE69632583T patent/DE69632583T2/en not_active Expired - Lifetime
- 1996-06-07 JP JP9500054A patent/JPH11506198A/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
DE69632583T2 (en) | 2005-06-09 |
CA2223748C (en) | 2002-09-24 |
EP0830612A1 (en) | 1998-03-25 |
US5657756A (en) | 1997-08-19 |
JPH11506198A (en) | 1999-06-02 |
DE69632583D1 (en) | 2004-07-01 |
EP0830612B1 (en) | 2004-05-26 |
AU6117296A (en) | 1996-12-30 |
WO1996041209A1 (en) | 1996-12-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed | ||
MKLA | Lapsed |
Effective date: 20060607 |