JPS57201806A - Ultrasonic diagnostic device - Google Patents
Ultrasonic diagnostic deviceInfo
- Publication number
- JPS57201806A JPS57201806A JP56086993A JP8699381A JPS57201806A JP S57201806 A JPS57201806 A JP S57201806A JP 56086993 A JP56086993 A JP 56086993A JP 8699381 A JP8699381 A JP 8699381A JP S57201806 A JPS57201806 A JP S57201806A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency
- ultrasonic
- delay line
- variable delay
- 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
Classifications
-
- 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)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
PURPOSE:To obtain a high ultrasonic picture sensitivity with a low momentary transmission output in an ultrasonic transmitting and receiving device, by using a variable delay line to convert the impulse to chirp pulses and transmitting them and compressing them after logarithmic amplification. CONSTITUTION:A transmission impulse 102 is converted to a chirp signal 106 by a variable delay line which has a longer delay time for higher frequency components and the chirp signal 106 is converted to a signal 108 by reducing the frequency. This signal 108 is amplified and is transmitted as ultrasonic waves to receive an echo 110. The transfer frequency band of an ultrasonic transducer is DELTAf=6-4MHz. Next, the frequency reverse conversion of 4 11.6 9MHz is performed after the logarithmic amplification in the dynamic range of Y=120dB. The signal of this frequency reverse conversion is compressed by a similar variable delay line to obtain pulses. When the noise is 60dB=Y/2 (Y is the dynamic range of the logarithmic amplifier) and the delay time difference is denoted as DELTAT, the range after compression is Y(DELTAf.DELTAT)<1/2>=4Y but the noise is not related to the time and is Y/2 still.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56086993A JPS57201806A (en) | 1981-06-08 | 1981-06-08 | Ultrasonic diagnostic device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56086993A JPS57201806A (en) | 1981-06-08 | 1981-06-08 | Ultrasonic diagnostic device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57201806A true JPS57201806A (en) | 1982-12-10 |
JPS6359106B2 JPS6359106B2 (en) | 1988-11-17 |
Family
ID=13902389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56086993A Granted JPS57201806A (en) | 1981-06-08 | 1981-06-08 | Ultrasonic diagnostic device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57201806A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100406097B1 (en) * | 2001-12-26 | 2003-11-14 | 주식회사 메디슨 | Ultrasound imaging system and method using the weighted chirp signals |
KR100406098B1 (en) * | 2001-12-26 | 2003-11-14 | 주식회사 메디슨 | Ultrasound imaging system and method based on simultaneous multiple transmit-focusing using the weighted orthogonal chirp signals |
JP2008514921A (en) * | 2004-09-24 | 2008-05-08 | ザ・ボーイング・カンパニー | Multi-channel multiplexed inspection system and method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5223286A (en) * | 1975-08-14 | 1977-02-22 | Raytheon Co | Signal processor |
JPS5651660A (en) * | 1979-09-29 | 1981-05-09 | Nukem Gmbh | Method of and apparatus for processing wide band signal having large dynamic range |
-
1981
- 1981-06-08 JP JP56086993A patent/JPS57201806A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5223286A (en) * | 1975-08-14 | 1977-02-22 | Raytheon Co | Signal processor |
JPS5651660A (en) * | 1979-09-29 | 1981-05-09 | Nukem Gmbh | Method of and apparatus for processing wide band signal having large dynamic range |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100406097B1 (en) * | 2001-12-26 | 2003-11-14 | 주식회사 메디슨 | Ultrasound imaging system and method using the weighted chirp signals |
KR100406098B1 (en) * | 2001-12-26 | 2003-11-14 | 주식회사 메디슨 | Ultrasound imaging system and method based on simultaneous multiple transmit-focusing using the weighted orthogonal chirp signals |
JP2008514921A (en) * | 2004-09-24 | 2008-05-08 | ザ・ボーイング・カンパニー | Multi-channel multiplexed inspection system and method |
Also Published As
Publication number | Publication date |
---|---|
JPS6359106B2 (en) | 1988-11-17 |
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