JPS6411535A - Ultrasonic diagnostic apparatus - Google Patents
Ultrasonic diagnostic apparatusInfo
- Publication number
- JPS6411535A JPS6411535A JP16947287A JP16947287A JPS6411535A JP S6411535 A JPS6411535 A JP S6411535A JP 16947287 A JP16947287 A JP 16947287A JP 16947287 A JP16947287 A JP 16947287A JP S6411535 A JPS6411535 A JP S6411535A
- Authority
- JP
- Japan
- Prior art keywords
- echo signal
- signal
- echo
- logarithmic amplifier
- level
- 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.)
- Pending
Links
Landscapes
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
PURPOSE:To perform tracking even when the amplitude of an echo signal becomes small, by inputting the echo signal obtained from an examinee to an echo tracking means through a logarithmic amplifier. CONSTITUTION:A logarithmic amplifier has an input characteristic C. The echo signal Se changing like A inputted to the logarithmic amplifier along with a noise signal Sn is amplified as shown by B by the characteristic C of the logarithmic amplifier. Herein, when the noise signal Sn and the echo signal Se simultaneously inputted are at the almost same level in amplitude, an output signal gets the echo signal Se relatively raised in its level as compared with the noise signal Sn. Contrarily, the noise signal Sn is relatively lowered in its level at an area where the level of the echo signal Se is high. By this constitution, since an S/N ratio is improved even when the amplitude of the echo signal Se is small, tracking becomes possible. Therefore, followability is enhanced and diagnostic capacity is enhanced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16947287A JPS6411535A (en) | 1987-07-07 | 1987-07-07 | Ultrasonic diagnostic apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16947287A JPS6411535A (en) | 1987-07-07 | 1987-07-07 | Ultrasonic diagnostic apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6411535A true JPS6411535A (en) | 1989-01-17 |
Family
ID=15887188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16947287A Pending JPS6411535A (en) | 1987-07-07 | 1987-07-07 | Ultrasonic diagnostic apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6411535A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6080440A (en) * | 1983-10-12 | 1985-05-08 | 吉村 正蔵 | Non-penetrative blood pressure measuring apparatus |
JPS6247983B2 (en) * | 1984-04-24 | 1987-10-12 | Teijin Ltd |
-
1987
- 1987-07-07 JP JP16947287A patent/JPS6411535A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6080440A (en) * | 1983-10-12 | 1985-05-08 | 吉村 正蔵 | Non-penetrative blood pressure measuring apparatus |
JPS6247983B2 (en) * | 1984-04-24 | 1987-10-12 | Teijin Ltd |
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