WO2009144461A3 - Magnetic induction tomography - Google Patents

Magnetic induction tomography Download PDF

Info

Publication number
WO2009144461A3
WO2009144461A3 PCT/GB2009/001335 GB2009001335W WO2009144461A3 WO 2009144461 A3 WO2009144461 A3 WO 2009144461A3 GB 2009001335 W GB2009001335 W GB 2009001335W WO 2009144461 A3 WO2009144461 A3 WO 2009144461A3
Authority
WO
WIPO (PCT)
Prior art keywords
signal
excitation
active reference
receive
reference signal
Prior art date
Application number
PCT/GB2009/001335
Other languages
French (fr)
Other versions
WO2009144461A2 (en
Inventor
Stuart Watson
Original Assignee
Ugcs (University Of Glamorgan Commercial Services) 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 Ugcs (University Of Glamorgan Commercial Services) Ltd. filed Critical Ugcs (University Of Glamorgan Commercial Services) Ltd.
Publication of WO2009144461A2 publication Critical patent/WO2009144461A2/en
Publication of WO2009144461A3 publication Critical patent/WO2009144461A3/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/05Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/05Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/0522Magnetic induction tomography
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/05Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/053Measuring electrical impedance or conductance of a portion of the body
    • A61B5/0536Impedance imaging, e.g. by tomography
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/10Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
    • G01V3/104Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils

Abstract

A magnetic induction tomography (MIT) apparatus comprises an excitation signal generator (70) for generating an excitation signal; a primary excitation coil (50) arranged to receive the excitation signal from the excitation signal generator (70) and to convert the excitation signal into electromagnetic radiation and to emit said radiation to excite a sample having at least one of an electrical conductivity distribution, an electrical permittivity distribution or a magnetic permeability distribution; a primary receiver coil (60) arranged to receive electromagnetic radiation from the excited sample and to convert the received radiation into a detection signal; and a signal distribution network (115) arranged to receive the detection signal from the primary receiver coil (60). The apparatus further comprises a passive reference detector arranged to detect the excitation signal and to convert the detected signal into a passive reference signal. The apparatus further comprises an active reference signal generator (230) for generating an active reference signal; and an active reference source (175) arranged to receive the active reference signal from the active reference signal generator (230) and to supply the active reference signal to the signal distribution network (115).
PCT/GB2009/001335 2008-05-28 2009-05-28 Magnetic induction tomography WO2009144461A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0809679.4 2008-05-28
GB0809679A GB2462243A (en) 2008-05-28 2008-05-28 Magnetic induction tomography with two reference signals

Publications (2)

Publication Number Publication Date
WO2009144461A2 WO2009144461A2 (en) 2009-12-03
WO2009144461A3 true WO2009144461A3 (en) 2010-11-18

Family

ID=39616214

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2009/001335 WO2009144461A2 (en) 2008-05-28 2009-05-28 Magnetic induction tomography

Country Status (2)

Country Link
GB (1) GB2462243A (en)
WO (1) WO2009144461A2 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011018744A1 (en) * 2009-08-14 2011-02-17 Koninklijke Philips Electronics N.V. Method and device for measuring conductivity of an object
EP2333587A1 (en) * 2009-12-14 2011-06-15 Technische Universität Graz Device and method for magnetic induction tomography
EP2332463A1 (en) * 2009-12-14 2011-06-15 Technische Universität Graz Device and method magnetic induction tomography
CN103370639B (en) 2011-02-14 2016-12-14 皇家飞利浦有限公司 The coil device for magnetic induction impedance measuring equipment including the magnetic exciting field in part compensation search coil
US10743815B2 (en) 2012-01-19 2020-08-18 Cerebrotech Medical Systems, Inc. Detection and analysis of spatially varying fluid levels using magnetic signals
US11357417B2 (en) 2012-01-19 2022-06-14 Cerebrotech Medical Systems, Inc. Continuous autoregulation system
EP3571986A1 (en) 2012-01-19 2019-11-27 Cerebrotech Medical Systems, Inc. Diagnostic system for detection of fluid changes
GB2500216B (en) * 2012-03-13 2017-07-26 Usw Commercial Services Ltd Method and apparatus for magnetic induction spectroscopy
WO2015129756A1 (en) * 2014-02-25 2015-09-03 学校法人北里研究所 Image generating device, conductivity acquiring device, image generating method, and program
US9207197B2 (en) 2014-02-27 2015-12-08 Kimberly-Clark Worldwide, Inc. Coil for magnetic induction to tomography imaging
US9442088B2 (en) 2014-02-27 2016-09-13 Kimberly-Clark Worldwide, Inc. Single coil magnetic induction tomographic imaging
US9320451B2 (en) 2014-02-27 2016-04-26 Kimberly-Clark Worldwide, Inc. Methods for assessing health conditions using single coil magnetic induction tomography imaging
US10349864B2 (en) 2015-04-17 2019-07-16 Elwha Llc Methods and system for performing magnetic induction tomography
EP3726255A1 (en) 2019-04-17 2020-10-21 Mettler-Toledo Safeline Limited Method for operating a metal detector and metal detector
BR102020006101A2 (en) 2019-04-17 2020-11-03 Mettler-Toledo Safeline Limited METHOD FOR OPERATING A METAL DETECTOR AND METAL DETECTOR
JP2020177013A (en) 2019-04-17 2020-10-29 メトラー−トレド・セーフライン・リミテッド Method for operating metal detector, and metal detector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006137012A2 (en) * 2005-06-23 2006-12-28 Philips Intellectual Property & Standards Gmbh Method and apparatus for inductively measuring the bio-impedance of a user's body
WO2008011649A1 (en) * 2006-07-24 2008-01-31 Technische Universität Graz Device and method for magnetic induction tomography

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005057467A2 (en) * 2003-12-02 2005-06-23 Subqiview Inc. Tissue characterization using an eddy-current probe
JP2008536606A (en) * 2005-04-19 2008-09-11 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Method and apparatus for inductively measuring bioimpedance of a user's body
EP2052274A2 (en) * 2006-08-11 2009-04-29 Philips Intellectual Property & Standards GmbH Sensor coil array for magnetic inductance tomography with reduced mutual coil coupling

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006137012A2 (en) * 2005-06-23 2006-12-28 Philips Intellectual Property & Standards Gmbh Method and apparatus for inductively measuring the bio-impedance of a user's body
WO2008011649A1 (en) * 2006-07-24 2008-01-31 Technische Universität Graz Device and method for magnetic induction tomography

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CASANAS R ET AL: "Biological tissue characterization by magnetic induction spectroscopy (MIS): requirements and limitations", IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, IEEE SERVICE CENTER, PISCATAWAY, NJ, US LNKD- DOI:10.1109/TBME.2003.813533, vol. 50, no. 7, 1 July 2003 (2003-07-01), pages 870 - 880, XP011097445, ISSN: 0018-9294 *
WENWEN LIANG ET AL: "Phase Detection Based on the Lock-in Amplifier SR844 and Experiments of Brain Neuron Cells in MIT System", BIOMEDICAL ENGINEERING AND INFORMATICS, 2008. BMEI 2008. INTERNATIONAL CONFERENCE ON, IEEE, PISCATAWAY, NJ, USA, 27 May 2008 (2008-05-27), pages 638 - 642, XP031275760, ISBN: 978-0-7695-3118-2 *

Also Published As

Publication number Publication date
GB2462243A (en) 2010-02-03
GB0809679D0 (en) 2008-07-02
WO2009144461A2 (en) 2009-12-03

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