FR2406833A1 - Dispositif de visualisation d'images ultrasoniques formees par reflexion d'impulsions a profondeur de champ variable - Google Patents

Dispositif de visualisation d'images ultrasoniques formees par reflexion d'impulsions a profondeur de champ variable

Info

Publication number
FR2406833A1
FR2406833A1 FR7829985A FR7829985A FR2406833A1 FR 2406833 A1 FR2406833 A1 FR 2406833A1 FR 7829985 A FR7829985 A FR 7829985A FR 7829985 A FR7829985 A FR 7829985A FR 2406833 A1 FR2406833 A1 FR 2406833A1
Authority
FR
France
Prior art keywords
pulses
reflection
ultrasonic images
field
depth
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.)
Withdrawn
Application number
FR7829985A
Other languages
English (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.)
RCA Corp
Original Assignee
RCA Corp
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
Priority claimed from US05/844,140 external-priority patent/US4138895A/en
Priority claimed from US05/844,141 external-priority patent/US4168628A/en
Application filed by RCA Corp filed Critical RCA Corp
Publication of FR2406833A1 publication Critical patent/FR2406833A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
    • B06B1/0622—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements on one surface
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid
    • G01H3/10—Amplitude; Power
    • G01H3/12—Amplitude; Power by electric means
    • G01H3/125—Amplitude; Power by electric means for representing acoustic field distribution
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/89—Sonar systems specially adapted for specific applications for mapping or imaging
    • G01S15/8906—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques
    • G01S15/8909—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a static transducer configuration
    • G01S15/8915—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a static transducer configuration using a transducer array
    • G01S15/8922—Short-range imaging systems; Acoustic microscope systems using pulse-echo techniques using a static transducer configuration using a transducer array the array being concentric or annular
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
    • G01S7/52046—Techniques for image enhancement involving transmitter or receiver

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mechanical Engineering (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

L'invention concerne un dispositif d'images ultrasoniques formées par réflexion d'impulsions à profondeur variable. Un transducteur ultrasonique 10 comprenant une section centrale 18, qui ne coopère qu'avec une petite partie de l'ouverture relativement grande d'une lentille acoustique 202, et une section annulaire 20, qui coopère avec le reste de l'ouverture peut être sélectivement actionné par un moyen de commutation 12 afin d'utiliser le signal détecté à profondeur de champ de mise au point relativement importante correspondant à la seule section centrale ou d'utiliser le signal détecté à profondeur de mise au point relativement petite correspondant à la réunion de la section centrale et de la section annulaire. L'invention s'applique notamment aux appareils de diagnostic médical.
FR7829985A 1977-10-20 1978-10-20 Dispositif de visualisation d'images ultrasoniques formees par reflexion d'impulsions a profondeur de champ variable Withdrawn FR2406833A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/844,140 US4138895A (en) 1977-10-20 1977-10-20 Switchable depth of focus pulse-echo ultrasonic-imaging display system
US05/844,141 US4168628A (en) 1977-10-20 1977-10-20 Pulse-echo ultrasonic-imaging display system having time-varied effective aperture

Publications (1)

Publication Number Publication Date
FR2406833A1 true FR2406833A1 (fr) 1979-05-18

Family

ID=27126479

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7829985A Withdrawn FR2406833A1 (fr) 1977-10-20 1978-10-20 Dispositif de visualisation d'images ultrasoniques formees par reflexion d'impulsions a profondeur de champ variable

Country Status (4)

Country Link
JP (1) JPS5470675A (fr)
DE (1) DE2845791A1 (fr)
FR (1) FR2406833A1 (fr)
GB (1) GB2006434B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2448155A1 (fr) * 1979-02-01 1980-08-29 Mediscan Inc Appareil ultrasonique de diagnostic medical
FR2523326A1 (fr) * 1982-03-09 1983-09-16 Stanford Res Inst Int Appareil de formation d'images par ultrasons
FR2579886A1 (en) * 1985-04-05 1986-10-10 Edap Ultrasound echography apparatus allowing the display of the blood flow in a vessel

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3003317C2 (de) * 1980-01-30 1984-08-23 Siemens AG, 1000 Berlin und 8000 München Schaltung zum wechselweisen Aussenden und Empfangen mit ein und demselben Schallwandler
JPS6336172A (ja) * 1986-07-29 1988-02-16 Toshiba Corp 超音波カプラ
DE3833234C2 (de) * 1988-09-30 1995-03-16 Wolfgang Kessler Verfahren zum Kalibrieren oder Prüfen eines piezokeramischen Wandlers
JPH02234600A (ja) * 1989-03-07 1990-09-17 Mitsubishi Mining & Cement Co Ltd 圧電変換素子
GB8912782D0 (en) * 1989-06-02 1989-07-19 Udi Group Ltd An acoustic transducer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2448155A1 (fr) * 1979-02-01 1980-08-29 Mediscan Inc Appareil ultrasonique de diagnostic medical
FR2523326A1 (fr) * 1982-03-09 1983-09-16 Stanford Res Inst Int Appareil de formation d'images par ultrasons
FR2579886A1 (en) * 1985-04-05 1986-10-10 Edap Ultrasound echography apparatus allowing the display of the blood flow in a vessel

Also Published As

Publication number Publication date
JPS5470675A (en) 1979-06-06
DE2845791A1 (de) 1979-04-26
GB2006434B (en) 1982-03-03
GB2006434A (en) 1979-05-02
DE2845791B2 (fr) 1979-10-18

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Legal Events

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ST Notification of lapse