Patent DE867969C successfully refreshed from Google Patents.
Patent US4567898A successfully refreshed from Google Patents.
US4567898A
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Method and means for imaging obstructed blood vessels
Assignee: General Electric Co
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Filing: 1985-07-10
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Granted: 1986-02-04
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Expires: 2005-07-10
Abstract
Abstract Obstructions in a blood vessel are identified and displayed by determining changes in textural patterns based on the ultrasonic waves reflected from the blood vessel. The textural pattern from stationary scatterers, such as found in a clot, remains essentially constant, whereas the texture pattern for moving scatterers such as flowing blood cells is ever changing. By determining and imaging the variations in textural pattern of the reflected ultrasonic waves the identification of obstructions in the vessel is realized.
Inventors
- 👤 Jay S. Plugge
- 👤 Stephen W. Flax
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:17
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
83 words
A method of detecting obstructions in a blood vessel comprising the steps of transmitting ultrasonic signals to said blood vessel, receiving reflected ultrasonic signals from said blood vessel, generating electrical signals indicative of textural patterns in response to received ultrasonic signals, determining changes in textural patterns represented by said electrical signals including establishing image data based on said reflected ultrasonic signals and subtracting image data for one time period from image data from another time period, and displaying the changes in textural patterns.
Claim 2
Independent Claim
83 words
A method of detecting obstructions in a blood vessel comprising the steps of transmitting ultrasonic signals to said blood vessel, receiving reflected ultrasonic signals from said blood vessel, generating electrical signals indicative of textural patterns in response to received ultrasonic signals, determining changes in textural patterns represented by said electrical signals including establishing image data based on said reflected ultrasonic signals and subtracting image data for one time period from image data from another time period, and displaying the changes in textural patterns.
Claim 3
Dependent Claim
17 words
The method as defined by claim 1 wherein said image data comprises frame data for video display.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |