GB2006434A - Switchable Depth of Focus Pulse-Echo Ultrasonic-imaging Display System - Google Patents
Switchable Depth of Focus Pulse-Echo Ultrasonic-imaging Display SystemInfo
- Publication number
- GB2006434A GB2006434A GB7840784A GB7840784A GB2006434A GB 2006434 A GB2006434 A GB 2006434A GB 7840784 A GB7840784 A GB 7840784A GB 7840784 A GB7840784 A GB 7840784A GB 2006434 A GB2006434 A GB 2006434A
- Authority
- GB
- United Kingdom
- Prior art keywords
- depth
- focus
- switching
- annular
- transducer
- 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
Links
- 238000003384 imaging method Methods 0.000 title 1
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)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (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
The invention permits changing of the effective depth of focus in the system to which the invention relates by providing a transducer unit (10) having a central section (18/16) and a separate surrounding annular section (20/16) which are effective in detecting different parts of the signal portion of the reflected beam, the central section detecting a part returning through only a small portion of the lens aperture and the annular section detecting the part returning through the remainder of the aperture. Switching (12) is coupled to the two transducer sections (18/16, 20/16) for selectively displaying either only the parts detected by the central portion or both that part and the part detected by the annular portion together. The switching can be used to select only the center portion (providing a greater depth of focus) for initial setting up prior to selecting both portions for a high resolution display of a target area in a desired plane with reduced depth focus. Alternatively the switching may be time-controlled relatively to the outward and return journeys of the transmitted pulses to provide maximum resolution within a small focal region of a relatively large aperture lens, using both center and annular portions of the transducer, while structure under examination but outside of that region can be displayed at lower resolution using only the center portion. <IMAGE>
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 (2)
Publication Number | Publication Date |
---|---|
GB2006434A true GB2006434A (en) | 1979-05-02 |
GB2006434B GB2006434B (en) | 1982-03-03 |
Family
ID=27126479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7840784A Expired GB2006434B (en) | 1977-10-20 | 1978-10-17 | Switchable depth of focus pulse-echo ultra-sonic imaging display system |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS5470675A (en) |
DE (1) | DE2845791A1 (en) |
FR (1) | FR2406833A1 (en) |
GB (1) | GB2006434B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0033508A1 (en) * | 1980-01-30 | 1981-08-12 | Siemens Aktiengesellschaft | Circuit for intermittently transmitting and receiving with only one sound transmitter-transducer |
GB2223377A (en) * | 1988-09-30 | 1990-04-04 | Dornier Gmbh | Piezoelectric transducer |
GB2232321A (en) * | 1989-03-07 | 1990-12-05 | Mitsubishi Mining & Cement Co | Focusing piezoelectric transducer |
GB2232323A (en) * | 1989-06-02 | 1990-12-05 | Udi Group Ltd | Acoustic transducer |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4242911A (en) * | 1979-02-01 | 1981-01-06 | Mediscan, Inc. | Ultrasonic medical diagnostic apparatus and method |
US4442713A (en) * | 1982-03-09 | 1984-04-17 | Sri International | Frequency varied ultrasonic imaging array |
FR2579886A1 (en) * | 1985-04-05 | 1986-10-10 | Edap | Ultrasound echography apparatus allowing the display of the blood flow in a vessel |
JPS6336172A (en) * | 1986-07-29 | 1988-02-16 | Toshiba Corp | Ultrasonic coupler |
-
1978
- 1978-10-17 GB GB7840784A patent/GB2006434B/en not_active Expired
- 1978-10-18 JP JP12903978A patent/JPS5470675A/en active Pending
- 1978-10-20 DE DE19782845791 patent/DE2845791A1/en not_active Withdrawn
- 1978-10-20 FR FR7829985A patent/FR2406833A1/en not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0033508A1 (en) * | 1980-01-30 | 1981-08-12 | Siemens Aktiengesellschaft | Circuit for intermittently transmitting and receiving with only one sound transmitter-transducer |
GB2223377A (en) * | 1988-09-30 | 1990-04-04 | Dornier Gmbh | Piezoelectric transducer |
GB2223377B (en) * | 1988-09-30 | 1993-06-02 | Dornier Gmbh | A hydrophone and a piezoelectric hydrophone transducer |
GB2232321A (en) * | 1989-03-07 | 1990-12-05 | Mitsubishi Mining & Cement Co | Focusing piezoelectric transducer |
GB2232323A (en) * | 1989-06-02 | 1990-12-05 | Udi Group Ltd | Acoustic transducer |
Also Published As
Publication number | Publication date |
---|---|
JPS5470675A (en) | 1979-06-06 |
GB2006434B (en) | 1982-03-03 |
DE2845791B2 (en) | 1979-10-18 |
DE2845791A1 (en) | 1979-04-26 |
FR2406833A1 (en) | 1979-05-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3371660A (en) | Equipment for use in ultrasonic eye examination | |
JPS645539A (en) | Glasses equipped with magnetifying glass having automatic focusing function | |
US4169662A (en) | Method and apparatus for producing acoustic waves by laser pulses | |
ATE132722T1 (en) | ULTRASONIC SCAN USING ESOPIAL PROBE | |
FR2394106A1 (en) | OPTICAL TRANSDUCER AND LENS FOCUSING SYSTEM, ESPECIALLY FOR VIDEO DISCS | |
GB1417907A (en) | Laser device particularly useful as a surgical instrument | |
GB2006434A (en) | Switchable Depth of Focus Pulse-Echo Ultrasonic-imaging Display System | |
US4138895A (en) | Switchable depth of focus pulse-echo ultrasonic-imaging display system | |
AU550335B2 (en) | Ultrasonic image scanner | |
US4168628A (en) | Pulse-echo ultrasonic-imaging display system having time-varied effective aperture | |
GB1597821A (en) | Scanning radiationsource detectors | |
JPS55155337A (en) | Focus adjuster | |
US4304468A (en) | Eye refractometer having a viewing target projecting system | |
JPH0324982B2 (en) | ||
US3554647A (en) | Spectroscope equipment using a slender cylindrical reflector as a substitute for a slit | |
GB2079938A (en) | Ultrasonic examination using section images | |
AU517900B2 (en) | Highspeed imaging of electrophotographic film by fine beam scanning | |
JPS57166530A (en) | Color measuring device | |
JPS6480893A (en) | Laser distance measuring machine | |
JPS5539023A (en) | Optical displacement meter | |
GB1512037A (en) | Optical focusing system | |
RU95115358A (en) | AUTOMATIC FOCUS SYSTEM | |
SU1661710A1 (en) | Device for focusing objective | |
SU404466A1 (en) | ELECTRORETINOGRAPH -; - PTG "", s, f ^ H? ^ U ';; t?;', Ii> & L Phi ^ Sh y> &1Us;. ^ ^^ | |
AU3665478A (en) | Highspeed imaging of electrophotographic film by fine beam scanning |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |