GB1240194A - Method and apparatus for forming an image of the interior of solid, liquid, or gaseous bodies - Google Patents

Method and apparatus for forming an image of the interior of solid, liquid, or gaseous bodies

Info

Publication number
GB1240194A
GB1240194A GB3974468A GB3974468A GB1240194A GB 1240194 A GB1240194 A GB 1240194A GB 3974468 A GB3974468 A GB 3974468A GB 3974468 A GB3974468 A GB 3974468A GB 1240194 A GB1240194 A GB 1240194A
Authority
GB
United Kingdom
Prior art keywords
interior
transmitter
converted
image
solid
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.)
Expired
Application number
GB3974468A
Inventor
Hansrichard Schulz
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.)
SABA GmbH
Original Assignee
SABA GmbH
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 SABA GmbH filed Critical SABA GmbH
Priority to GB3974468A priority Critical patent/GB1240194A/en
Publication of GB1240194A publication Critical patent/GB1240194A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9046—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents by analysing electrical signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

1,240,194. Measuring physical properties electrically. SABA SCHWARZWALDER APPARATE-BAU-ANSTALT AUGUST SCHWER SÍHNE G.m.b.H. Aug. 20, 1968, No. 39744/ 68. Heading G1N. [Also in Division H4] In apparatus for forming an image of the interior of solid, liquid or gas bodies (e.g. for representing the inner organs of the human body) comprising an inductive probe for producing an alternating magnetic field which induces eddy currents in the interior of the body and a receiving coil for sensing the field strength of the secondary magnetic fields produced by the eddy currents, the inductive probe and the receiving coil are scanned, line by line, over the outside of the body and output signals are converted into luminous density signals in an image reproducing system (e.g. a cathode ray tube) and the frequency of the alternating field is chosen such that its penetration depth in the body is less than ten times the diameter of the body and its penetration depth in a region to be distinguished 'within the body is less than the diameter of this region. Improved contrast is obtained by synchronously rectifying the received signals, the phase difference between the received signals and the reference signal taken from the transmitter being adjustable from 0 to 2# radians. The rectified signal is converted to its fourth power and the second differential of the converted signal is subtracted from it. Each of the transmitter and receiver probes contains a high permeability core and is screened at its rear. They may be on opposite sides of the body or on the same side of the body in which case a single coil may serve as the transmitter and the receiver.
GB3974468A 1968-08-20 1968-08-20 Method and apparatus for forming an image of the interior of solid, liquid, or gaseous bodies Expired GB1240194A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3974468A GB1240194A (en) 1968-08-20 1968-08-20 Method and apparatus for forming an image of the interior of solid, liquid, or gaseous bodies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3974468A GB1240194A (en) 1968-08-20 1968-08-20 Method and apparatus for forming an image of the interior of solid, liquid, or gaseous bodies

Publications (1)

Publication Number Publication Date
GB1240194A true GB1240194A (en) 1971-07-21

Family

ID=10411239

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3974468A Expired GB1240194A (en) 1968-08-20 1968-08-20 Method and apparatus for forming an image of the interior of solid, liquid, or gaseous bodies

Country Status (1)

Country Link
GB (1) GB1240194A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4250451A (en) * 1978-12-28 1981-02-10 Cordless Power Corporation Magnetic induction imaging system
WO1981003226A1 (en) * 1980-05-06 1981-11-12 Univ Georgetown Apparatus and method for image reproduction of materials using their magnetic and electric properties
EP0229831A1 (en) * 1985-07-11 1987-07-29 The Johns Hopkins University Electromagnetic bone healing sensor
US5648720A (en) * 1993-03-25 1997-07-15 International Business Machines Corporation Apparatus and method for producing a magnetic image of a conductive pattern using eddy currents

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4250451A (en) * 1978-12-28 1981-02-10 Cordless Power Corporation Magnetic induction imaging system
WO1981003226A1 (en) * 1980-05-06 1981-11-12 Univ Georgetown Apparatus and method for image reproduction of materials using their magnetic and electric properties
EP0052128A1 (en) * 1980-05-06 1982-05-26 Univ Georgetown Apparatus and method for image reproduction of materials using their magnetic and electric properties.
EP0052128A4 (en) * 1980-05-06 1983-08-24 Univ Georgetown Apparatus and method for image reproduction of materials using their magnetic and electric properties.
US4493039A (en) * 1980-05-06 1985-01-08 President And Directors Of Georgetown University Apparatus and method for image reproduction of materials using their magnetic and electric properties
EP0229831A1 (en) * 1985-07-11 1987-07-29 The Johns Hopkins University Electromagnetic bone healing sensor
EP0229831A4 (en) * 1985-07-11 1988-04-27 Univ Johns Hopkins Electromagnetic bone healing sensor.
US5648720A (en) * 1993-03-25 1997-07-15 International Business Machines Corporation Apparatus and method for producing a magnetic image of a conductive pattern using eddy currents

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