CA2057455A1 - Compact magnetometer probe and an array of them covering the whole human skull for measurement of magnetic fields arising from the activity of the brain - Google Patents

Compact magnetometer probe and an array of them covering the whole human skull for measurement of magnetic fields arising from the activity of the brain

Info

Publication number
CA2057455A1
CA2057455A1 CA002057455A CA2057455A CA2057455A1 CA 2057455 A1 CA2057455 A1 CA 2057455A1 CA 002057455 A CA002057455 A CA 002057455A CA 2057455 A CA2057455 A CA 2057455A CA 2057455 A1 CA2057455 A1 CA 2057455A1
Authority
CA
Canada
Prior art keywords
support structure
fiber glass
spring
dewar
sensor element
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
CA002057455A
Other languages
French (fr)
Other versions
CA2057455C (en
Inventor
Antti Ilmari Ahonen
Jukka Erkki Tapani Knuutila
Juha Tapani Antero Simola
Visa Antero Vilkman
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.)
Neuromag Oy
Original Assignee
Antti Ilmari Ahonen
Jukka Erkki Tapani Knuutila
Juha Tapani Antero Simola
Visa Antero Vilkman
Neuromag Oy
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 Antti Ilmari Ahonen, Jukka Erkki Tapani Knuutila, Juha Tapani Antero Simola, Visa Antero Vilkman, Neuromag Oy filed Critical Antti Ilmari Ahonen
Publication of CA2057455A1 publication Critical patent/CA2057455A1/en
Application granted granted Critical
Publication of CA2057455C publication Critical patent/CA2057455C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • A61B5/245—Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/842—Measuring and testing
    • Y10S505/843—Electrical
    • Y10S505/845—Magnetometer
    • Y10S505/846—Magnetometer using superconductive quantum interference device, i.e. squid

Abstract

The invention relates to a sensor element made of thin film components and fiber glass, and a support structure made of fiber glass; when the sensor elements are at-tached to the support structure, a sensor system suitable for magnetoencephalographic measurements is formed.
A substrate containing a planar signal coil and a SQUID
is attached on a circuit board made of fiber glass using a spring cut on the edge of the body plate. On the sensor element, there is a small but mechanically stable con-nector or several such connectors (5); when the sensor element is plugged in the receptacles (6) on the support structure (7), the element settles in a well defined orien-tation. The support structure (7) is made of a fiber glass shell following the shape of the bottom (10) dewar ves-sel, adapted to the shape of the head. The receptacles (6) are attached to the glass fiber shell by means of springs (9) made of thin fiber glass plate in such a way that an array covering the whole skull as evenly as possible is formed when the sensor elements are plugged to the re-ceptacles. The spring is cut in a way to enable rotation only around an arbitrary axis in the plane of the spring and a translation only in a direction perpendicular to the plane of the spring. When this support structure is inserted in the dewar, the individual sensor elements lean against the dewar bottom (10) by aid of three feet (11), pressed by springs (9), settling perpendicularly to the normal of the dewar bottom passing through the center of the sensor element.
CA002057455A 1990-12-21 1991-12-10 Compact magnetometer probe and an array of them covering the whole human skull for measurement of magnetic fields arising from the activity of the brain Expired - Lifetime CA2057455C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI906342A FI89131C (en) 1990-12-21 1990-12-21 MAGNETOMETER DETECTOR OVER DERAS MONTAGE I EN FLORKANALIG ANORDNING FOER MAETNING AV MAENSKANS HJAERNFUNKTIONER ALSTRANDE MAGNETFAELT
FI906342 1990-12-21

Publications (2)

Publication Number Publication Date
CA2057455A1 true CA2057455A1 (en) 1992-06-22
CA2057455C CA2057455C (en) 2003-03-11

Family

ID=8531631

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002057455A Expired - Lifetime CA2057455C (en) 1990-12-21 1991-12-10 Compact magnetometer probe and an array of them covering the whole human skull for measurement of magnetic fields arising from the activity of the brain

Country Status (9)

Country Link
US (1) US5309095A (en)
EP (1) EP0492263B1 (en)
JP (1) JP3096336B2 (en)
AT (1) ATE128838T1 (en)
CA (1) CA2057455C (en)
DE (1) DE69113767T2 (en)
DK (1) DK0492263T3 (en)
ES (1) ES2078417T3 (en)
FI (1) FI89131C (en)

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US7976451B2 (en) 2005-06-16 2011-07-12 The United States Of America As Represented By The Department Of Health And Human Services Transcranial magnetic stimulation system and methods
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US9248308B2 (en) 2013-02-21 2016-02-02 Brainsway, Ltd. Circular coils for deep transcranial magnetic stimulation
US9533168B2 (en) 2013-02-21 2017-01-03 Brainsway, Ltd. Unilateral coils for deep transcranial magnetic stimulation
US10772520B2 (en) 2015-06-25 2020-09-15 DePuy Synthes Products, Inc. Intraoperative magnetometry monitoring system
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US11717686B2 (en) 2017-12-04 2023-08-08 Neuroenhancement Lab, LLC Method and apparatus for neuroenhancement to facilitate learning and performance
WO2019133997A1 (en) 2017-12-31 2019-07-04 Neuroenhancement Lab, LLC System and method for neuroenhancement to enhance emotional response
US11364361B2 (en) 2018-04-20 2022-06-21 Neuroenhancement Lab, LLC System and method for inducing sleep by transplanting mental states
US10976386B2 (en) 2018-07-17 2021-04-13 Hi Llc Magnetic field measurement system and method of using variable dynamic range optical magnetometers
US11262420B2 (en) 2018-08-17 2022-03-01 Hi Llc Integrated gas cell and optical components for atomic magnetometry and methods for making and using
US11136647B2 (en) 2018-08-17 2021-10-05 Hi Llc Dispensing of alkali metals mediated by zero oxidation state gold surfaces
WO2020040882A1 (en) 2018-08-20 2020-02-27 Hi Llc Magnetic field shaping components for magnetic field measurement systems and methods for making and using
US10627460B2 (en) 2018-08-28 2020-04-21 Hi Llc Systems and methods including multi-mode operation of optically pumped magnetometer(s)
WO2020056418A1 (en) 2018-09-14 2020-03-19 Neuroenhancement Lab, LLC System and method of improving sleep
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US11415641B2 (en) 2019-07-12 2022-08-16 Hi Llc Detachable arrangement for on-scalp magnetoencephalography (MEG) calibration
US10996293B2 (en) 2019-08-06 2021-05-04 Hi Llc Systems and methods having an optical magnetometer array with beam splitters
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Also Published As

Publication number Publication date
FI89131C (en) 1993-08-25
JPH04296680A (en) 1992-10-21
CA2057455C (en) 2003-03-11
US5309095A (en) 1994-05-03
EP0492263B1 (en) 1995-10-11
FI89131B (en) 1993-05-14
EP0492263A1 (en) 1992-07-01
ATE128838T1 (en) 1995-10-15
FI906342A (en) 1992-06-22
DE69113767D1 (en) 1995-11-16
ES2078417T3 (en) 1995-12-16
DK0492263T3 (en) 1995-11-27
DE69113767T2 (en) 1996-03-14
FI906342A0 (en) 1990-12-21
JP3096336B2 (en) 2000-10-10

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