US4301410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spin imaging in solids using synchronously rotating field gradients and samples
Assignee: International Business Machines Corp
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Filing: 1979-09-28
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Granted: 1981-11-17
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Expires: 1999-09-28
Abstract
Abstract A method for spin imaging in solids using nuclear magnetic resonance (NMR) spectroscopy. The invention includes the steps of rotating the sample about an axis which makes a particular angle with the NMR static external magnetic field, rotating a magnetic field gradient with a spatial distribution which is related to the sample spinning axis synchronously with the sample, collecting the data while performing a solid state NMR line narrowing step, and changing the phase relation between the sample rotation and the field gradient rotation on a step-by-step basis to map out an image of the object.
Inventors
- 👤 Robert A. Wind
- 👤 Costantino S. Yannoni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:31
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/44; G01R33/48; G01R33/4816; G01R33/28; G01R33/30; G01R33/307
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
52 words
A method of spin-imaging in solids using nuclear magnetic resonance in which a solid sample positioned within the field of an rf excitation coil and a static external magnetic field is rotated about an axis comprising the steps of: a. superimposing a specific magnetic field gradient on the static external magnetic field,
Claim 2
Independent Claim
52 words
A method of spin-imaging in solids using nuclear magnetic resonance in which a solid sample positioned within the field of an rf excitation coil and a static external magnetic field is rotated about an axis comprising the steps of: a. superimposing a specific magnetic field gradient on the static external magnetic field,
Claim 3
Dependent Claim
39 words
b. rotating the magnetic field gradient synchronously with the sample, c. collecting data while performing solid state NMR line narrowing procedures, and d. changing the phase relation between the sample rotation and field gradient rotation on a step-by-step basis.
Claim 4
Dependent Claim
39 words
b. rotating the magnetic field gradient synchronously with the sample, c. collecting data while performing solid state NMR line narrowing procedures, and d. changing the phase relation between the sample rotation and field gradient rotation on a step-by-step basis.
Claim 5
Dependent Claim
18 words
A method as described in claim 1 including repeating steps b and c after each phase relation change.
Claim 6
Dependent Claim
19 words
A method as described in claim 2 including reconstructing the spin image of the sample from the collected data.
Claim 7
Independent Claim
122 words
A method of spin-imaging in solids comprising the steps of: placing a solid sample within the field of an rf excitation coil and the static external magnetic field of an NMR spectrometer; superimposing a specific magnetic field gradient in one direction on the static external magnetic field to provide different resonant NMR frequencies in different parts of the sample; rotating the sample about an axis which makes a particular angle with the direction of the static external magnetic field; rotating the magnetic field gradient synchronously with the sample; collecting data while performing solid state NMR line narrowing procedures, and changing the phase relation between the sample rotation and field-gradient rotation on a step-by-step basis to map out an image of the object.
Claim 8
Independent Claim
122 words
A method of spin-imaging in solids comprising the steps of: placing a solid sample within the field of an rf excitation coil and the static external magnetic field of an NMR spectrometer; superimposing a specific magnetic field gradient in one direction on the static external magnetic field to provide different resonant NMR frequencies in different parts of the sample; rotating the sample about an axis which makes a particular angle with the direction of the static external magnetic field; rotating the magnetic field gradient synchronously with the sample; collecting data while performing solid state NMR line narrowing procedures, and changing the phase relation between the sample rotation and field-gradient rotation on a step-by-step basis to map out an image of the object.
Claim 9
Dependent Claim
12 words
A method as described in claim 4 whereby the angle is 54.7'.
Claim 10
Dependent Claim
14 words
A method as described in claim 4 whereby the magnet field gradient is linear.
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) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |