Short bore-length asymmetric electromagnets for magnetic resonan

Details Short bore-length asymmetric electromagnets for magnetic resonan Short bore-length asymmetric electromagnets for magnetic resonan

1999-05-21

2000-05-16

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

335299, 335301, 324319, 324320, 600422, G01V 300

Patent

active

060642904

ABSTRACT:
A homogeneous field electromagnet having at least two coils in each of two regions. One region has a smaller inner radius than the other region so that the magnet is asymmetrical. The magnet has coils with a smaller radius on one side compared to the other side. This provides the benefit of allowing the magnet to be shorter for a given field of view size (compared to a uniform-radius cylindrical magnet). In a preferred embodiment the magnet is short enough so that a patient's heart can be located within the field of view (FOV) while visual access is provided to the patient's face. Specific dimensions are given for the two regions, including lengths, inner radii, and outer radii. The magnet can also include gradient coils and RF electronics for magnetic resonance imaging.

REFERENCES:
patent: 5382904 (1995-01-01), Pissanetzky
patent: 5396207 (1995-03-01), Dorri et al.
patent: 5416415 (1995-05-01), Dorri et al.
patent: 5801609 (1998-09-01), Laskaris et al.

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