5099207 Method of determining a nuclear magnetization distribution of a sub-volume of an object, method of shimming a part of a steady field in which the object is situated, and magnetic resonance device for performing such a method

1993 ◽  
Vol 11 (3) ◽  
pp. III
Author(s):  
Peter R Luyten
Keyword(s):  
Magnetic Resonance ◽  
Magnetization Distribution ◽  
Nuclear Magnetization

Field focusing n.m.r. (FONAR) and the formation of chemical images in man

1980 ◽  
Vol 289 (1037) ◽  
pp. 489-500 ◽  
Keyword(s):  
Magnetic Resonance ◽  
Medical Diagnosis ◽  
Malignant Disease ◽  
Small Volume ◽  
Static Field ◽  
Nuclear Resonance ◽  
Nuclear Spins ◽  
Frequency Condition ◽  
Driving Field ◽  
Nuclear Magnetization

The first proposals for n.m r. scanning in medical diagnosis were made by Damadian (1971 a ; 1972) and were followed by Lauterbur (1973). Damadian’s method of scanning used the principle that the forced precessions of a nuclear magnetization under radio frequency (r.f.) driving field specify the conditions for obtaining spatial resolution of the signal producing domains of a nuclear resonance sample. Sufficient coupling of the nuclear spins to the radiation field to produce a signal detectable by r.f. spectroscopy requires that the stringent Bohr frequency condition, hv = µH 0 /I , be met. It became possible to construct, with the aid of direct current auxiliary coils, a small volume, called the resonance aperture, inside the applied static field of the magnetic resonance experiment. The correct value of H 0 for the applied frequency is restricted to this aperture. The technique (Damadian 1972) was developed to provide a method for non-surgically detecting chemical abnormalities in the diseased organs of patients (Damadian 1971 a ). The first n.m.r. scans of normal patients and of those with malignant disease are discussed.

Nuclear magnetization distribution radii determined by hyperfine transitions in the1slevel of H-like ions185Re74+and187Re74+

1998 ◽  
Vol 57 (2) ◽  
pp. 879-887 ◽  
Author(s):  
J. R. Crespo López-Urrutia ◽  
P. Beiersdorfer ◽  
K. Widmann ◽  
B. B. Birkett ◽  
A.-M. Mårtensson-Pendrill ◽  
...  
Keyword(s):  
Magnetization Distribution ◽  
Hyperfine Transitions ◽  
Nuclear Magnetization

Higher order interelectronic-interaction correctionsto the ground-state hyperfine splitting in lithiumlike ions

2000 ◽  
Vol 78 (7) ◽  
pp. 701-709 ◽  
Author(s):  
O M Zherebtsov ◽  
V M Shabaev
Keyword(s):  
Ground State ◽  
Hyperfine Splitting ◽  
Nuclear Model ◽  
Magnetization Distribution ◽  
Configuration Interaction Method ◽  
Nuclear Magnetization ◽  
Theoretical Predictions ◽  
Relativistic Configuration ◽  
Relativistic Configuration Interaction ◽  
Interelectronic Interaction

The interelectronic-interaction corrections of the second order in 1/Z to the ground-state hyperfine splitting in lithiumlike ions are evaluated. The calculations are performed by using the relativistic configuration-interaction method and perturbation theory. In addition, the nuclear magnetization distribution effect on the interelectronic-interaction correction of the first order in 1/Z is evaluated within the single-particle nuclear model. The calculations provide an improvement in the theoretical predictions for the hyperfine splitting in lithiumlike ions. PACS Nos.: 31.30Gs, 31.30Jv

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