US4530363A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transducer array for sector scan and doppler flow measurement applications
Assignee: General Electric Co
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Filing: 1983-10-20
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Granted: 1985-07-23
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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 17:39
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)
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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 |