Mechanical detection and imaging of magnetic resonance by magnet

Details Mechanical detection and imaging of magnetic resonance by magnet Mechanical detection and imaging of magnetic resonance by magnet

1992-06-09

1993-11-30

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324300, G01V 300

Patent

active

052668967

ABSTRACT:
Methods and apparatus for detecting (and, if desired, imaging) the effects of magnetic resonance in a spin-containing material by measuring the magnetic force acting on a mechanical cantilever having a low damping coefficient due to modulation of the magnetic moment of the material in the polarizing field direction at a frequency substantially lower than the spin resonance frequency. Modulation of the magnetic moment in the direction of the polarizing magnetic field may be achieved by modulating (i) the magnitude of the magnetic field in the polarizing direction or (ii) the frequency or amplitude of a high-frequency magnetic field.

REFERENCES:
patent: 5001426 (1991-03-01), Frey et al.
patent: 5036286 (1991-07-01), Holm-Kennedy et al.
patent: 5166615 (1992-11-01), Sidles
Sidles, "Noninductive Detection of Single-proton Magnetic Resonance", Applied Physics Letters, vol. 58, Jun. 17, 1991, pp. 2854-2856.
Garstens et al., "Low-field Magnetic Resonance", Physical Review, vol. 99, No. 2, pp. 459-463, Jul. 15, 1955.
Abragam, "The Principles of Nuclear Magnetism", Oxford Univ. Press, London, 1961, pp. 32-37, 65-71, and 86-87.
Sidles, "Folded Stern-Gerlach Experiment as a Means for Detecting Nuclear Magnetic Resonance in Individual Nuclei", Phys. Rev. Let., vol. 68, pp. 1124-1127.
S. Chiang et al., "Measurement of Magnetization or Magnetic Susceptibility of Small Particles and Measurement of Field Gradients of Domain Walls", IBM Tech. Disclosure Bulletin, vol. 30, No. 4, Sep. 1987.

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