JPS6415033A - Ultrasonic doppler diagnostic apparatus - Google Patents
Ultrasonic doppler diagnostic apparatusInfo
- Publication number
- JPS6415033A JPS6415033A JP17267587A JP17267587A JPS6415033A JP S6415033 A JPS6415033 A JP S6415033A JP 17267587 A JP17267587 A JP 17267587A JP 17267587 A JP17267587 A JP 17267587A JP S6415033 A JPS6415033 A JP S6415033A
- Authority
- JP
- Japan
- Prior art keywords
- supplied
- speed
- output
- signals
- examined
- 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
Landscapes
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
PURPOSE:To well perform measurement even an reflecting body moving at a long distance and high speed, by a method wherein an ultrasonic pulse wave is divided timewise to be transmitted to and received by an object to be examined while successively changed in a direction and the receiving signals are respectively converted to receiving signals having desired frequencies to calculate radial speeds which are, in turn, compared with each other to operate the tangential speed of a sector scanning circular arc. CONSTITUTION:The output of a quartz oscillator 10 is supplied to a frequency dividing synchronous circuit 12 to output pulse signals 101, 102 having two kinds of burst frequencies and said signals are changed over in synchronous relation to the integral multiple of a repeating cycle by change-over devices 14, 16 to be supplied to a probe 22. The refelected echo from an object 23 to be examined is sent to a high frequency amplifier 26 from a duplexer circuit 20 and one output thereof is supplied to a display part while the other output is subjected to speed operational processing and converted to a complex signal to be supplied to a self- correlation operator 60 and operation is performed at every ultrasonic pulse wave emitted in a time sharing manner. By this method, a speed component is calculated but, on the basis of signals separated by a fine angle in two directions, a radial speed and a tangential speed are calculated by the first and second comparators 70, 80 to be supplied to a vector speed operator 90. The output thereof is supplied to a CRT display device 32 from a D/A converter 37.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17267587A JPS6415033A (en) | 1987-07-09 | 1987-07-09 | Ultrasonic doppler diagnostic apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17267587A JPS6415033A (en) | 1987-07-09 | 1987-07-09 | Ultrasonic doppler diagnostic apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6415033A true JPS6415033A (en) | 1989-01-19 |
JPH0431264B2 JPH0431264B2 (en) | 1992-05-26 |
Family
ID=15946284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17267587A Granted JPS6415033A (en) | 1987-07-09 | 1987-07-09 | Ultrasonic doppler diagnostic apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6415033A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61178680A (en) * | 1985-02-04 | 1986-08-11 | Aloka Co Ltd | Apparatus for converting frequency of doppler signal |
JPS62152437A (en) * | 1985-12-26 | 1987-07-07 | アロカ株式会社 | Ultrasonic doppler diagnostic apparatus |
JPS62152436A (en) * | 1985-12-26 | 1987-07-07 | アロカ株式会社 | Ultrasonic doppler diagnostic apparatus |
-
1987
- 1987-07-09 JP JP17267587A patent/JPS6415033A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61178680A (en) * | 1985-02-04 | 1986-08-11 | Aloka Co Ltd | Apparatus for converting frequency of doppler signal |
JPS62152437A (en) * | 1985-12-26 | 1987-07-07 | アロカ株式会社 | Ultrasonic doppler diagnostic apparatus |
JPS62152436A (en) * | 1985-12-26 | 1987-07-07 | アロカ株式会社 | Ultrasonic doppler diagnostic apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPH0431264B2 (en) | 1992-05-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |