Magnet structure for focusing of magnetic resonance images

Details Magnet structure for focusing of magnetic resonance images Magnet structure for focusing of magnetic resonance images

1991-04-30

1993-06-22

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324309, G01V 300

Patent

active

052219003

ABSTRACT:
Apparati and methods for magnetic resonance imaging a selected interrogation volume in a tissue of a human or animal body, to provide increased signal-to-noise ratios for fixed data acquisition times. The method involves excitation of magnetic resonance in a selected interrogation volume that may be as small as 500-3,000 cm.sup.3, through controllable focusing or steering of a rotating magnetic field signal used to induce magnetic resonance. The response signals issued by the excited volume element are then collected by focusing of these response signals, using a phased array of antennae for this purpose. Use of the invention with well known nuclear magnetic resonance excitation procedures, such as spin echo, echo planar, gradient recalled and backprojection, are discussed.

REFERENCES:
patent: 4723116 (1988-02-01), Muller et al.
patent: 4825162 (1989-04-01), Roemer et al.
patent: 5086275 (1992-02-01), Roemer

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