JPS6411535A - Ultrasonic diagnostic apparatus - Google Patents

Ultrasonic diagnostic apparatus

Info

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
Application number
JP16947287A
Other languages
Japanese (ja)
Inventor
Eiichi Shiki
Hiroshi Furuhata
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.)
Toshiba Corp
Canon Medical Systems Corp
Original Assignee
Toshiba Corp
Toshiba Medical Systems Engineering Co Ltd
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
Application filed by Toshiba Corp, Toshiba Medical Systems Engineering Co Ltd filed Critical Toshiba Corp
Priority to JP16947287A priority Critical patent/JPS6411535A/en
Publication of JPS6411535A publication Critical patent/JPS6411535A/en
Pending legal-status Critical Current

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.
JP16947287A 1987-07-07 1987-07-07 Ultrasonic diagnostic apparatus Pending JPS6411535A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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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