US5196343A
Expired / Lapsed
US
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Ultrasonic calibration material and method
Assignee: Computerized Imaging Reference Systems Inc
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Filing: 1990-10-04
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Granted: 1993-03-23
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Expires: 2010-10-04
Abstract
Abstract Ultrasonic calibration material produced by polymerization of acrylamide with N,N'-methylene-bis-acrylamide in vacuum-degassed liquid solutions such as water, ethylene glycol, emulsions of non-miscible liquids with water and blends of liquids in which a homogeneous and permanent suspension of solid and liquid particles (e.g.: alumina, boron nitride, graphite, water-filled phenolic microspheres, glass microspheres, polyethylene, turpentine oil) is chemically achieved by polymerization of an acrylic acid polymer.
Inventors
- 👤 Moustafa B. Zerhouni
- 👤 Mohammed Rachedine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:46
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; G01N29/30; Y; Y10; Y10T; Y10T436/00; Y10T436/10
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
42 words
An ultrasonic calibration material comprising, a solid elastic material; said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix; wherein, said liquid comprises ethylene glycol and, wherein, said resin matrix comprises homogeneously suspended particles and a suspending agent.
Claim 2
Dependent Claim
42 words
An ultrasonic calibration material comprising, a solid elastic material; said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix; wherein, said liquid comprises ethylene glycol and, wherein, said resin matrix comprises homogeneously suspended particles and a suspending agent.
Claim 3
Dependent Claim
104 words
An ultrasonic calibration material comprising, a solid elastic material, said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix, wherein, said liquid comprises ethylene glycol and, wherein, said resin matrix comprises homogeneously suspended particles and a suspending agent, wherein said solid elastic material has a speed of sound within the range of 1420 m/s to 1650 m/s, and, said solid elastic material has a sonic attenuation within the range of 0.1 to 1.5 Db/cm/MHz in the frequency range of 2 to 10 MHz; and, said solid elastic material has backscatter reflection characteristics within the range of backscatter of living tissue.
Claim 4
Dependent Claim
104 words
An ultrasonic calibration material comprising, a solid elastic material, said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix, wherein, said liquid comprises ethylene glycol and, wherein, said resin matrix comprises homogeneously suspended particles and a suspending agent, wherein said solid elastic material has a speed of sound within the range of 1420 m/s to 1650 m/s, and, said solid elastic material has a sonic attenuation within the range of 0.1 to 1.5 Db/cm/MHz in the frequency range of 2 to 10 MHz; and, said solid elastic material has backscatter reflection characteristics within the range of backscatter of living tissue.
Claim 5
Dependent Claim
86 words
An ultrasonic calibration material comprising: a solid elastic material, said solid elastic material having a calibrated speed of sound, sonic attenuation and backscatter reflection characteristics, each of said calibrated speed of sound, said sonic attenuation and said backscatter reflection characteristics being definable within the range of speed, attenuation and backscatter, respectively, of living tissue; said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix, wherein said liquid comprises ethylene glycol, and, said resin matrix comprising homogeneously suspended particles and a suspending agent.
Claim 6
Dependent Claim
86 words
An ultrasonic calibration material comprising: a solid elastic material, said solid elastic material having a calibrated speed of sound, sonic attenuation and backscatter reflection characteristics, each of said calibrated speed of sound, said sonic attenuation and said backscatter reflection characteristics being definable within the range of speed, attenuation and backscatter, respectively, of living tissue; said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix, wherein said liquid comprises ethylene glycol, and, said resin matrix comprising homogeneously suspended particles and a suspending agent.
Claim 7
Dependent Claim
100 words
An ultrasonic calibration material comprising: a solid elastic material, said solid elastic material having a calibrated speed of sound, sonic attenuation and backscatter reflection characteristics, each of said calibrated speed of sound, said sonic attenuation and said backscatter reflection characteristics being definable within the range of speed, attenuation and backscatter, respectively, of living tissue; said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix, wherein such liquid comprises an emulsion of ethylene glycol, water, and nonmiscible-to-water liquids formed by the use of a surfactant, and, said resin matrix comprising homogeneously suspended particles and a suspending agent.
Claim 8
Dependent Claim
100 words
An ultrasonic calibration material comprising: a solid elastic material, said solid elastic material having a calibrated speed of sound, sonic attenuation and backscatter reflection characteristics, each of said calibrated speed of sound, said sonic attenuation and said backscatter reflection characteristics being definable within the range of speed, attenuation and backscatter, respectively, of living tissue; said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix, wherein such liquid comprises an emulsion of ethylene glycol, water, and nonmiscible-to-water liquids formed by the use of a surfactant, and, said resin matrix comprising homogeneously suspended particles and a suspending agent.
Claim 9
Dependent Claim
90 words
An ultrasonic calibration material comprising: a solid elastic material, said solid elastic material having a calibrated speed of sound, sonic attenuation and backscatter reflection characteristics, each of said calibrated speed of sound, said sonic attenuation and said backscatter reflection characteristics being definable within the range of speed, attenuation and backscatter, respectively, of living tissue; said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix, wherein such liquid comprises ethylene glycol, water and miscible-to-water liquids, and, said resin matrix comprising homogeneously suspended particles and a suspending agent.
Claim 10
Dependent Claim
90 words
An ultrasonic calibration material comprising: a solid elastic material, said solid elastic material having a calibrated speed of sound, sonic attenuation and backscatter reflection characteristics, each of said calibrated speed of sound, said sonic attenuation and said backscatter reflection characteristics being definable within the range of speed, attenuation and backscatter, respectively, of living tissue; said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix, wherein such liquid comprises ethylene glycol, water and miscible-to-water liquids, and, said resin matrix comprising homogeneously suspended particles and a suspending agent.
Claim 11
Dependent Claim
105 words
An ultrasonic calibration material comprising: a solid elastic material, said solid elastic material having a calibrated speed of sound, sonic attenuation and backscatter reflection characteristics, each of said calibrated speed of sound, said sonic attenuation and said backscatter reflection characteristics being definable within the range of speed, attenuation and backscatter, respectively, of living tissue; said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix, wherein such liquid comprises ethylene glycol, water, and non miscible-to-water liquids formed by the use of a surfactant, and said non miscible-to-water liquids comprise turpentine oil, and, said resin matrix comprising homogeneously suspended particles and suspending agent.
Claim 12
Dependent Claim
105 words
An ultrasonic calibration material comprising: a solid elastic material, said solid elastic material having a calibrated speed of sound, sonic attenuation and backscatter reflection characteristics, each of said calibrated speed of sound, said sonic attenuation and said backscatter reflection characteristics being definable within the range of speed, attenuation and backscatter, respectively, of living tissue; said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix, wherein such liquid comprises ethylene glycol, water, and non miscible-to-water liquids formed by the use of a surfactant, and said non miscible-to-water liquids comprise turpentine oil, and, said resin matrix comprising homogeneously suspended particles and suspending agent.
Claim 13
Dependent Claim
105 words
An ultrasonic calibration material comprising: solid elastic material, said solid elastic material having a calibrated speed of sound, sonic attenuation and backscatter reflection characteristics, each of said calibrated speed of sound, said sonic attenuation and said backscatter reflection characteristics being definable within the range of speed, attenuation and backscatter, respectively, of living tissue; said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix, wherein said liquid comprises ethylene glycol, and, said resin matrix comprising homogeneously suspended particles and a suspending agent; wherein said suspended particles comprise alumina powder, boron nitride powder, graphite powder, water-filled phenolic microspheres, glass microspheres, or polyethylene powder.
Claim 14
Dependent Claim
105 words
An ultrasonic calibration material comprising: solid elastic material, said solid elastic material having a calibrated speed of sound, sonic attenuation and backscatter reflection characteristics, each of said calibrated speed of sound, said sonic attenuation and said backscatter reflection characteristics being definable within the range of speed, attenuation and backscatter, respectively, of living tissue; said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix, wherein said liquid comprises ethylene glycol, and, said resin matrix comprising homogeneously suspended particles and a suspending agent; wherein said suspended particles comprise alumina powder, boron nitride powder, graphite powder, water-filled phenolic microspheres, glass microspheres, or polyethylene powder.
Claim 15
Dependent Claim
97 words
An ultrasonic calibration material comprising: a solid elastic material, said solid elastic material having a calibrated speed of sound, sonic attenuation and backscatter reflection characteristics, each of said calibrated speed of sound, said sonic attenuation and said backscatter reflection characteristics being definable within the range of speed, attenuation and backscatter, respectively, of living tissue; said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix, wherein said liquid comprises ethylene glycol, and, said resin matrix comprising homogeneously suspended particles and a suspending agent; wherein the suspending agent is a chemically neutralized acrylic acid polymer.
Claim 16
Dependent Claim
97 words
An ultrasonic calibration material comprising: a solid elastic material, said solid elastic material having a calibrated speed of sound, sonic attenuation and backscatter reflection characteristics, each of said calibrated speed of sound, said sonic attenuation and said backscatter reflection characteristics being definable within the range of speed, attenuation and backscatter, respectively, of living tissue; said solid elastic material comprising a vacuum degassed, liquid based acrylamide polymerized resin matrix, wherein said liquid comprises ethylene glycol, and, said resin matrix comprising homogeneously suspended particles and a suspending agent; wherein the suspending agent is a chemically neutralized acrylic acid polymer.
Claim 17
Dependent Claim
22 words
Ultrasonic calibration material as claimed in 8 in which the neutralization is achieved by a solution of sodium hydroxide in water. a
References Cited (Backward Citations)
US3663842A
Cited
US4002221A
Cited
US4021364A
Cited
US4365516A
Cited
SU728079A1
Cited
US4277367A
Cited
US4523122A
Cited
JPS60153296A
Cited
US4895574A
Cited
US4905700A
Cited
US4674512A
Cited
US4813402A
Cited
US4906421A
Cited
US4940740A
Cited
US5053341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-03-22 | 1996-09-21 | 1997-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-22 | 2000-09-21 | 2001-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-22 | 2004-09-21 | 2005-03-23 | $7700.00 | Window Closed / Lapsed |