US5051698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
NMR imaging systems
Assignee: BTG International Ltd
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Filing: 1989-04-26
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Granted: 1991-09-24
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Expires: 2009-04-26
Abstract
Abstract Enhanced NMR images of a desired portion of an object are obtained by obtaining a plurality of NMR responses of the object each response comprising information from a plurality of smaller volumes within the object and by combining together the plurality of NMR responses by addition or subtraction to obtain enhanced images from the selected smaller volumes.
Inventors
- 👤 Roger Ordidge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:04
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/44; G01R33/48; G01R33/54; G01R33/56
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A method of generating an NMR spectrum of a desired portion of an object including obtaining M NMR responses of the object, each response comprising information from a plurality of smaller volumes within said object and combining together the M NMR responses by addition to obtain responses from selected smaller volumes, in which in the total sequence of M NMR responses each small volume experiences an even number of inversions of the spin system.
Claim 2
Independent Claim
74 words
A method of generating an NMR spectrum of a desired portion of an object including obtaining M NMR responses of the object, each response comprising information from a plurality of smaller volumes within said object and combining together the M NMR responses by addition to obtain responses from selected smaller volumes, in which in the total sequence of M NMR responses each small volume experiences an even number of inversions of the spin system.
Claim 3
Independent Claim
75 words
A method of generating an NMR spectrum of a desired portion of an object including obtaining M NMR responses of the object, each response comprising information from a plurality of smaller volumes within said object and combining together the M NMR responses by addition to obtain responses from selected smaller volumes, in which in the total sequence of M NMR responses each small volume experiences an even number of double inversions of the spin system.
Claim 4
Independent Claim
75 words
A method of generating an NMR spectrum of a desired portion of an object including obtaining M NMR responses of the object, each response comprising information from a plurality of smaller volumes within said object and combining together the M NMR responses by addition to obtain responses from selected smaller volumes, in which in the total sequence of M NMR responses each small volume experiences an even number of double inversions of the spin system.
Claim 5
Independent Claim
74 words
A method of generating an NMR spectrum of a desired portion of an object including obtaining M NMR responses of the object, each response comprising information from a plurality of smaller volumes within said object and combining together the M NMR responses by subtraction to obtain responses from selected smaller volumes, in which in the total sequence of M NMR responses each small volume experiences an even number of inversions of the spin system.
Claim 6
Independent Claim
74 words
A method of generating an NMR spectrum of a desired portion of an object including obtaining M NMR responses of the object, each response comprising information from a plurality of smaller volumes within said object and combining together the M NMR responses by subtraction to obtain responses from selected smaller volumes, in which in the total sequence of M NMR responses each small volume experiences an even number of inversions of the spin system.
Claim 7
Independent Claim
83 words
A method of generating an NMR spectrum of a desired portion of an object including obtaining M NMR responses of the object, each response comprising information from a plurality of smaller volumes within information from a plurality of smaller volumes within said object and combining together the M NMR responses by subtraction to obtain responses from selected smaller volumes in which in the total sequence of M NMR responses each small volume experiences an even number of double inversions of the spin system.
Claim 8
Independent Claim
83 words
A method of generating an NMR spectrum of a desired portion of an object including obtaining M NMR responses of the object, each response comprising information from a plurality of smaller volumes within information from a plurality of smaller volumes within said object and combining together the M NMR responses by subtraction to obtain responses from selected smaller volumes in which in the total sequence of M NMR responses each small volume experiences an even number of double inversions of the spin system.
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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) | 1994-09-23 | 1995-03-25 | 1995-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-23 | 1999-03-25 | 1999-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-23 | 2003-03-25 | 2003-09-24 | $7700.00 | Window Closed / Lapsed |