Patent US4530363A successfully refreshed from Google Patents.
US4530363A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer array for sector scan and doppler flow measurement applications
Assignee: General Electric Co
•
Filing: 1983-10-20
•
Granted: 1985-07-23
•
Expires: 2003-10-20
Abstract
Abstract An array of transducer elements which can be selectively actuated as a linear array for sector scanning and selectively actuated as a plurality of concentric annular arrays for focused Doppler blood flow measurements.
Inventors
- 👤 Axel F. Brisken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:27
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/18; G10K11/26; G10K11/34; G10K11/341; G10K11/345; A; A61; A61B; A61B8/00; A61B8/06; A61B8/13; G01; G01F; G01F1/00; G01F1/66; G01F1/662; G01F1/663; G01S; G01S15/00; G01S15/88; G01S15/89; G01S15/8906; G01S15/8909; G01S15/8915; G01S15/8925; G01S15/8927; G01S15/8979; G01S7/00; G01S7/52; G01S7/52017; G01S7/52053; G01S7/52057; G01S7/5206; G01S7/52063; G01S15/8918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
In a method of measuring blood flow in a vessel by Doppler techniques, the steps of: providing a two dimensional transducer array including a plurality of discrete transducer elements in a generally planar pattern, each transducer element being electrically and acoustically separated from other transducer elements, and each of said transducer elements being selectively actuated, selectively actuating said transducer elements in a first modality as a linear transducer array for sector scanning and locating a vessel of interest, selectively actuating said transducer elements in a second modality as a plurality of annular arrays for far field focusing on said vessel for blood flow measurements, and selectively actuating said transducer elements in a third modality as a central disc and an outer annulus for near field focusing on said vessel for blood flow measurements.
Claim 2
Dependent Claim
133 words
In a method of measuring blood flow in a vessel by Doppler techniques, the steps of: providing a two dimensional transducer array including a plurality of discrete transducer elements in a generally planar pattern, each transducer element being electrically and acoustically separated from other transducer elements, and each of said transducer elements being selectively actuated, selectively actuating said transducer elements in a first modality as a linear transducer array for sector scanning and locating a vessel of interest, selectively actuating said transducer elements in a second modality as a plurality of annular arrays for far field focusing on said vessel for blood flow measurements, and selectively actuating said transducer elements in a third modality as a central disc and an outer annulus for near field focusing on said vessel for blood flow measurements.
References Cited (Backward Citations)
US3888238A
Cited
US4067236A
Cited
US4242912A
Cited
US4235111A
Cited
US4219846A
Cited
US4307613A
Cited
US4422332A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |