1
Madabushi V Chari, Evangelos T Laskaris, Gary Bedrosian, Michele D Ogle: Open (non-enclosed) magnets for magnetic resonance imaging. General Electric Company, Patrick R Scanlon, Paul R Webb II, July 25, 1995: US05436607 (63 worldwide citation)

An open magnet having two magnet assemblies arranged in a spaced-apart, parallel relationship to define a working space therebetween is provided for magnetic resonance imaging. Each assembly has an annular superconductive coil and a ferromagnetic field enhancer encircled by the superconductive coil. ...


2
Bizhan Dorri, Evangelos T Laskaris, Michele D Ogle, Timothy J Havens: Shielded and open MRI magnet. General Electric Company, Douglas E Erickson, Marvin Snyder, October 15, 1996: US05565831 (32 worldwide citation)

A shielded and open magnetic resonance imaging (MRI) magnet having two spaced-apart, generally toroidal-shaped superconductive coil assemblies. Each coil assembly has a coil housing containing a generally annular-shaped superconductive main and a radially-outwardly spaced-apart shielding coil carryi ...


3
Bizhan Dorri, Evangelos T Laskaris, Michele D Ogle: Over-shoulder MRI magnet for human brain imaging. General Electric Company, Douglas E Erickson, Paul R Webb II, May 16, 1995: US05416415 (22 worldwide citation)

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 ...


4
Evangelos T Laskaris, William D Barber, Johannes M van Oort, Bulent Aksel, Paul S Thompson, Michele D Ogle: Laminate tile pole piece for an MRI, a method manufacturing the pole piece and a mold bonding pole piece tiles. General Electric Company, Foley & Lardner, July 10, 2001: US06259252 (20 worldwide citation)

A laminate tile pole piece for an MRI. Each laminate tile has a trapezoidal or annular sector shape. The trapezoidal shape allows the tiles to be attached side by side to form a multiple concentric annular array pole piece without using oddly shaped edge filler tiles needed to fill a circular pole p ...


5
Bizhan Dorri, Evangelos T Laskaris, Michele D Ogle: Magnet having pole faces with trapezoidal-shaped shims. General Electric Company, Douglas E Erickson, Paul R Webb II, August 29, 1995: US05446434 (18 worldwide citation)

A magnet including spaced-apart first and second pole pieces with generally opposing first and second pole faces. The first pole face has an axis extending generally towards the second pole face and has a generally circular shim tray generally coaxially aligned with the axis and attached to the firs ...


6
Bizhan Dorri, Evangelos T Laskaris, Michele D Ogle, Bu Xin Xu: Magnet having contoured pole faces for magnetic field homogeneity. General Electric Company, Irving M Freedman, John H Pilarski, July 23, 1996: US05539366 (16 worldwide citation)

A magnet including spaced-apart first and second pole pieces with generally opposing first and second pole faces. The first pole face has an axis extending generally towards the second pole face and has a surface region which includes at least two frustoconical surfaces. The frustoconical surfaces a ...


7
Evangelos T Laskaris, Michele D Ogle: Integral shield for mr magnet. General Electric Company, William H Steinberg, James C Davis Jr, Paul R Webb II, September 13, 1988: US04771256 (16 worldwide citation)

An integrally shielded magnetic resonance magnet is provided comprising a cylindrical ferromagnetic shell and two ferromagnetic circular end plates each defining a central aperture extending axially therethrough. The end plates are welded vacuum leak tight at their peripheries to either end of the s ...


8
Evangelos T Laskaris, William D Barber, Johannes M van Oort, Bulent Aksel, Paul S Thompson, Michele D Ogle: Mold for bonding MRI pole piece tiles and method of making the mold. General Electric Company, Foley & Lardner, August 6, 2002: US06429761 (16 worldwide citation)

A laminate tile pole piece for an MRI, a method and a mold for manufacturing laminate tile metal pole pieces for an MRI. Each laminate tile has a trapezoidal or annular sector shape. The trapezoidal shape allows the tiles to be attached side by side to form a multiple concentric annular array pole p ...


9
Madabushi V Chari, Evangelos T Laskaris, Michele D Ogle: Frustoconical magnet for magnetic resonance imaging. General Electric Company, Patrick R Scanlon, Paul R Webb II, April 26, 1994: US05307039 (15 worldwide citation)

An open magnet having a frustoconical shaped inner bore is provided for MR imaging. The magnet has a plurality of axisymmetric superconducting coils of differing diameters which are disposed along an axis in order of successively increasing diameters so as to define the frustoconical shape. This sha ...


10
Evangelos T Laskaris, Bizhan Dorri, Madabushi V Chari, Gerald B Kliman, Michele D Ogle: Superconducting magnet with magnetic shielding. General Electric Company, Douglas E Erickson, Paul R Webb II, May 14, 1996: US05517169 (15 worldwide citation)

A superconductive magnet with magnetic shielding has an annularly-cylindrical-shaped housing whose first end wall and outer cylindrical wall are magnetizable (e.g., iron) walls and whose inner cylindrical wall is a non-magnetizable wall. At least one main superconductive coil is positioned within th ...