Patent US3761286A successfully refreshed from Google Patents.
US4552152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic diagnostic apparatus using Doppler effect
Assignee: Panasonic Holdings Corp
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Filing: 1983-07-13
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Granted: 1985-11-12
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Expires: 2003-07-13
Abstract
Abstract Ultrasonic echo signals are detected in phase and integrated with a period corresponding to an ultrasonic pulse. The integrated values are sampled and the difference between two integrated values is successively frequency-analyzed.
Inventors
- 👤 Ryobun Tachita
- 👤 Tsutomu Yano
- 👤 Hiroshi Fukukita
- 👤 Kuniaki Fukaya
- 👤 Akira Fukumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:07
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
An ultrasonic diagnostic apparatus comprising: an ultrasonic diagnostic probe means for transmitting and receiving ultrasonic pulse signals; detector means coupled to said ultrasonic diagnostic probe means for detecting phases of signals received by said ultrasonic diagnostic probe means and for producing output signals indicative of said phases; means coupled to said detector means for integrating said phase indicative signals during a timing period corresponding to one of transmitting and receiving timing of respective said ultrasonic pulse signals by said probe means and for producing integrated signals as output; means coupled to said integrating means for selecting a plurality of said integrated signals during a said period of integration; and means coupled to said selecting means for analyzing the frequency of the difference of at least one pair of said plurality of integrated signals selected by said selecting means.
Claim 2
Dependent Claim
138 words
An ultrasonic diagnostic apparatus comprising: an ultrasonic diagnostic probe means for transmitting and receiving ultrasonic pulse signals; detector means coupled to said ultrasonic diagnostic probe means for detecting phases of signals received by said ultrasonic diagnostic probe means and for producing output signals indicative of said phases; means coupled to said detector means for integrating said phase indicative signals during a timing period corresponding to one of transmitting and receiving timing of respective said ultrasonic pulse signals by said probe means and for producing integrated signals as output; means coupled to said integrating means for selecting a plurality of said integrated signals during a said period of integration; and means coupled to said selecting means for analyzing the frequency of the difference of at least one pair of said plurality of integrated signals selected by said selecting means.
Claim 3
Dependent Claim
36 words
An ultrasonic diagnostic apparatus as in claim 1, wherein said selecting means includes analog to digital converting means for converting said plural integrated signals into digital signals prior to operation of said frequency analysis means thereon.
Claim 4
Dependent Claim
25 words
An ultrasonic diagnostic apparatus as in claim 1, further comprising memory means for storing said integrated signals each time said ultrasonic probe transmits or receives.
Claim 5
Dependent Claim
72 words
An ultrasonic diagnostic apparatus as in claim 1, further comprising detecting means for relating the temporal occurrence of said integrated signals with various distances from said probe delineated as respective positions within a subject object and for outputting the same as related respective positions, and means responsive to said output of said detecting means for selecting one of output signals from said frequency analyzing means in accordance wtih said related respective positions.
Claim 6
Dependent Claim
39 words
An ultrasonic diagnostic apparatus as claimed in claim 4, wherein said means for selecting output signals of said frequency analyzing means functions on the basis that said respective positions are indicative of a predetermined property of said integrated signals.
Claim 7
Dependent Claim
44 words
An ultrasonic diagnostic apparatus as claimed in claim 5, wherein said predetermined property is blood flow speed and said means for selecting further includes further means for determining the maximum blood flow speed indicated by said integrated signals at any given instant of time.
Claim 8
Dependent Claim
30 words
An ultrasonic diagnostic apparatus as claimed in claim 6, wherein one of said respective positions for which said further means determines said maximum blood flow speed defines a desired position.
Claim 9
Dependent Claim
33 words
An ultrasonic diagnostic apparatus as claimed in claim 6, wherein one of said respective positions other than one for which said further means determines said maximum blood flow speed defines a desired position.
Claim 10
Dependent Claim
38 words
An ultrasonic diagnostic apparatus as claimed in claim 5, wherein said selecting means selects an output signal of said frequency analyzing means by comparing said related respective positions output by said detecting means occurring within one pulsation period.
References Cited (Backward Citations)
US4265126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |