US5357959A
Expired / Lapsed
US
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Altered dipole moment magnetic resonance imaging method
Assignee: Praxair Technology Inc
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Filing: 1993-04-16
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Granted: 1994-10-25
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Expires: 2013-04-16
Abstract
Abstract A diagnostic medical magnetic resonance imaging and quantitative method for use with human and veterinary subjects in the diagnostic evaluation of normal, altered or diseased status of tissues and fluids containing lipids and or proteins by physically combining stable xenon and/or stable krypton in lipid and lipid containing structures in which they are soluble and physically combining stable xenon and/or stable krypton in protein structures comprised of molecules having nuclei with dipole moments which are altered by their physical incorporation of stable xenon and/or stable krypton in their structures when exposed to a magnetic field thus providing positive contrast enhancement to an image produced by magnetic resonance and the ability to quantify and measure physiology by magnetic resonance.
Inventors
- 👤 Royce S. Fishman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:16
CPC Classifications
A; A61; A61B; A61B6/00; G; G01; G01R; G01R33/00; G01R33/20; G01R33/44; G01R33/48; G01R33/54; G01R33/56; G01R33/5601; A61K; A61K49/00; A61K49/06; A61K49/18; A61K49/1806
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
125 words
A method for carrying out magnetic resonance imaging with improved positive image contrast and quantitative evaluation of physiology said method comprising: (A) providing a living organic subject having molecules comprised of nuclei with dipole moments; (B) providing stable xenon to said subject and physically combining stable xenon with structures comprised of said molecules and at least one of lipids and proteins; (C) applying a magnetic field to the subject and altering the dipole moment in at least some nuclei of said molecules by the secondary effect of stable xenon on the resonance of said structures; (D) providing radio energy for absorption and re-emission by said altered dipole moment nuclei; and (E) gathering data based on the reemitted radio energy to produce a magnetic resonance image.
Claim 2
Independent Claim
125 words
A method for carrying out magnetic resonance imaging with improved positive image contrast and quantitative evaluation of physiology said method comprising: (A) providing a living organic subject having molecules comprised of nuclei with dipole moments; (B) providing stable xenon to said subject and physically combining stable xenon with structures comprised of said molecules and at least one of lipids and proteins; (C) applying a magnetic field to the subject and altering the dipole moment in at least some nuclei of said molecules by the secondary effect of stable xenon on the resonance of said structures; (D) providing radio energy for absorption and re-emission by said altered dipole moment nuclei; and (E) gathering data based on the reemitted radio energy to produce a magnetic resonance image.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein the stable xenon is provided to the subject invasively by injection or infusion.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein the xenon is provided in gaseous form.
Claim 5
Dependent Claim
19 words
The method of claim 2 wherein the xenon is provided as part of an equilibrated, saturated or supersaturated solution.
Claim 6
Dependent Claim
39 words
The method of claim 1 wherein the subject is a person or animal and the stable xenon is provided to the subject non-invasively by the breathing in of pure stable xenon alternated with the breathing in of pure oxygen.
Claim 7
Dependent Claim
47 words
The method of claim 1 wherein the subject is a person or animal and the stable xenon is provided non-invasively to the subject by the breathing in of a mixture comprising from 10 to 80.5 mole percent stable xenon and from 19.5 to 90 mole percent oxygen.
Claim 8
Dependent Claim
20 words
The method of claim 6 wherein the mixture additionally comprises helium in a concentration of up to 70.5 mole percent.
Claim 9
Dependent Claim
21 words
The method of claim 6 wherein the mixture additionally comprises carbon dioxide in a concentration of up to 7 mole percent.
Claim 10
Dependent Claim
20 words
The method of claim 6 wherein the mixture additionally comprises nitrogen in a concentration of up to 70.5 mole percent.
Claim 11
Dependent Claim
22 words
The method of claim 1 wherein the data gathering of step (E) comprises establishing qualitative and quantitative physiological information and an image.
Claim 12
Dependent Claim
13 words
The method of claim 1 further comprising providing stable krypton to said subject.
Claim 13
Dependent Claim
42 words
The method of claim 11 wherein a mixture comprising from at least 20 to less than 40 mole percent stable xenon, from 40 to 60 mole percent stable krypton and from 20 to 40 mole percent oxygen is provided to the subject.
Claim 14
Independent Claim
124 words
A method for carrying out magnetic resonance imaging with improved positive image contrast and quantitative evaluation of physiology said method comprising: (A) providing a living organic subject having molecules comprised nuclei with dipole moments; (B) providing stable krypton to said subject and physically combining stable krypton with structures comprised of said molecules and at least one of lipids and proteins; (C) applying a magnetic field to the subject and altering the dipole moment in at least some nuclei of said molecules by the secondary effect of stable krypton on the resonance of said structures; (D) providing radio energy for adsorption and reemission by said altered dipole moment nuclei; and (E) gathering data based on the re-emitted radio energy to produce a magnetic resonance image.
Claim 15
Independent Claim
124 words
A method for carrying out magnetic resonance imaging with improved positive image contrast and quantitative evaluation of physiology said method comprising: (A) providing a living organic subject having molecules comprised nuclei with dipole moments; (B) providing stable krypton to said subject and physically combining stable krypton with structures comprised of said molecules and at least one of lipids and proteins; (C) applying a magnetic field to the subject and altering the dipole moment in at least some nuclei of said molecules by the secondary effect of stable krypton on the resonance of said structures; (D) providing radio energy for adsorption and reemission by said altered dipole moment nuclei; and (E) gathering data based on the re-emitted radio energy to produce a magnetic resonance image.
Claim 16
Dependent Claim
39 words
The method of claim 13 wherein the subject is a person or animal and the stable krypton is provided to the subject non-invasively by the breathing in of pure stable krypton alternated with the breathing in of pure oxygen.
Claim 17
Dependent Claim
47 words
The method of claim 13 wherein the subject is a person or animal and the stable krypton is provided non-invasively to the subject by the breathing in of a mixture comprising from 10 to 80.5 mole percent stable krypton and from 19.5 to 90 mole percent oxygen.
Claim 18
Dependent Claim
20 words
The method of claim 15 wherein the mixture additionally comprises helium in a concentration of up to 70.5 mole percent.
Claim 19
Dependent Claim
21 words
The method of claim 15 wherein the mixture additionally comprises carbon dioxide in a concentration of up to 7 mole percent.
Claim 20
Dependent Claim
20 words
The method of claim 15 wherein the mixture additionally comprises nitrogen in a concentration of up to 70.5 mole percent.
Claim 21
Dependent Claim
22 words
The method of claim 13 wherein the data gathering of step (E) comprises establishing qualitative and quantitative physiological information and an image.
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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) | 1997-10-24 | 1998-04-25 | 1998-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-24 | 2002-04-25 | 2002-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-24 | 2006-04-25 | 2006-10-25 | $7700.00 | Window Closed / Lapsed |