FR2348684A1 - Physiological response to electro:magnetic field - is determined by detectors using direct and secondary transmitters with effect of primary field eliminated at detector - Google Patents

Physiological response to electro:magnetic field - is determined by detectors using direct and secondary transmitters with effect of primary field eliminated at detector

Info

Publication number
FR2348684A1
FR2348684A1 FR7723175A FR7723175A FR2348684A1 FR 2348684 A1 FR2348684 A1 FR 2348684A1 FR 7723175 A FR7723175 A FR 7723175A FR 7723175 A FR7723175 A FR 7723175A FR 2348684 A1 FR2348684 A1 FR 2348684A1
Authority
FR
France
Prior art keywords
effect
detector
detectors
field
direct
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
FR7723175A
Other languages
French (fr)
Other versions
FR2348684B1 (en
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.)
RODLER ING HANS
Original Assignee
RODLER ING HANS
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 RODLER ING HANS filed Critical RODLER ING HANS
Priority to FR7723175A priority Critical patent/FR2348684A1/en
Publication of FR2348684A1 publication Critical patent/FR2348684A1/en
Application granted granted Critical
Publication of FR2348684B1 publication Critical patent/FR2348684B1/fr
Granted 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
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves  involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/006—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of the effect of a material on microwaves or longer electromagnetic waves, e.g. measuring temperature via microwaves emitted by the object
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Surgery (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Electromagnetism (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

The electromagnetic signal is transmitted through the biological body. Either the detectors, preferably loops or coils, are placed so that the effect of the direct transmission cancels, and only that of the physiological modification is left. Alternatively, a secondary transmitter generates a compensating field at the detector again cancelling the effect of the primary transmission. Several ways of achieving this effect are possible, e.g., by orientating the axis of the detector element w.r.t. the primary field, or by using two detecting loops at right angles. Scanning with a rotating field, or with two frequencies simultaneously, are among the possibilities available.
FR7723175A 1977-07-11 1977-07-11 Physiological response to electro:magnetic field - is determined by detectors using direct and secondary transmitters with effect of primary field eliminated at detector Granted FR2348684A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7723175A FR2348684A1 (en) 1977-07-11 1977-07-11 Physiological response to electro:magnetic field - is determined by detectors using direct and secondary transmitters with effect of primary field eliminated at detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7723175A FR2348684A1 (en) 1977-07-11 1977-07-11 Physiological response to electro:magnetic field - is determined by detectors using direct and secondary transmitters with effect of primary field eliminated at detector

Publications (2)

Publication Number Publication Date
FR2348684A1 true FR2348684A1 (en) 1977-11-18
FR2348684B1 FR2348684B1 (en) 1979-08-24

Family

ID=9193895

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7723175A Granted FR2348684A1 (en) 1977-07-11 1977-07-11 Physiological response to electro:magnetic field - is determined by detectors using direct and secondary transmitters with effect of primary field eliminated at detector

Country Status (1)

Country Link
FR (1) FR2348684A1 (en)

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTIONS ON BIO-MEDICAL ENGINEERING, VOLUME BME-15, NO. 4, OCTOBRE 1968, NEW YORK *
N.Y. P.P.TARJAN ET R.MC FEE "ELECTRODELESS MEASUREMENTS OF THE EFFECTIVE RESISTIVITY OF THE HUMAN TORSO AND HEAD BY MAGNETIC INDUCTION", PAGES 266 A 278) *

Also Published As

Publication number Publication date
FR2348684B1 (en) 1979-08-24

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Legal Events

Date Code Title Description
ST Notification of lapse