Over-shoulder MRI magnet for human brain imaging

Details Over-shoulder MRI magnet for human brain imaging Over-shoulder MRI magnet for human brain imaging

1994-08-05

1995-05-16

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324319, G01V 300

Patent

active

054164150

ABSTRACT:
A magnetic resonance imaging (MRI) magnet having an annularly cylindrical-shaped vacuum enclosure with a longitudinal axis, first and second longitudinal ends, a first larger diameter bore extending from the first towards the second longitudinal end, and a second smaller diameter bore extending from the second longitudinal end to the first bore. First and second superconductive coils are placed in the vacuum enclosure with the first coil generally circumferentially surrounding the first bore and the second coil circumferentially surrounding the second bore, wherein the radial distance of the radially innermost portion of the second coil from the axis is smaller than the radius of the first bore. The first longitudinal end of the vacuum enclosure fits over a patient's shoulders with the patient's head at least partially passing through the first bore and extending into the second bore for MRI brain imaging.

REFERENCES:
patent: 4500860 (1985-02-01), Vermilyea
patent: 4724412 (1988-02-01), Kalafala
patent: 4924198 (1990-05-01), Laskaris
patent: 4986078 (1991-01-01), Laskaris
patent: 5307039 (1994-04-01), Chari et al.
patent: 5311134 (1994-05-01), Yamagata et al.
U.S. patent application Ser. No. 08/260,433, filed Jun. 15, 1994, by E. T. Laskaris et al., "Open MRI Magnet with Superconductive Shielding".
U.S. patent application Ser. No. 08/237,516, filed Apr. 29, 1994, by E. T. Laskaris et al., "Pancake MRI Magnet with Modified Imaging Volume".
U.S. patent application Ser. No. 08/223,200, filed Apr. 5, 1994, by E. T. Laskaris et al., "Open MRI Magnet with Uniform Magnetic Field".
2-page Sales Brochure from Houston Advanced Researach Center entitled "MRI Magnets with Unprecedented Patient Access" (date unknown).

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