Abstract: An apparatus for open air MRI magnet support comprises a high modulus co-planar multi-cell concentric cylindrical box girder for to support superconductive coil elements with high rigidity. A single unitary coldmass comprises at least three vertical bearing members coupled to an upper multi-cell concentric cylindrical box beam and to a lower multi-cell concentric cylindrical box beam which supports superconductive coil elements against 50-100 ton electromagnetic forces in axial and radial (hoop) directions with trace deformation whereby frictional heating is prevented for to avoid magnet quench.

Abstract: An apparatus for MRI magnets allows shorter bores with strong homogenous imaging fields comprising an extremely rigid box girder for to prevent magnet quench due to deformation. The coldmass of the magnet comprises at least three co-axial cylinders as formers for superconducting coils and further comprises a plurality of annuluses to form a helium vessel and a multi-layer, multi-cell cylindrical annular box girder. The cylinders and annuluses are dimensioned as webs and flanges in endless closed box girders, also called box beams, providing a high moment of inertia structure in non-magnetic stainless steel to support 50-100 tons of electromagnetic force with only trace deformation.

Abstract: A cryogen boil-off gas re-liquefier adapted for retrofitting magnetic resonance instruments designed to exhaust vaporized helium. Means for recondensing helium and nitrogen boil off gasses to reduce operating cost of cryogenic systems.

Abstract: A table-top MRI system with substantially reduced capital requirements enables various applications to be used on education and research institution and various laboratory use for MRI applications. A magnetic structure is disclosed with two rectangular permanent magnets, four right triangular permanent magnets, and four right trapezoidal permanent magnets. The MRI system further comprises an RF assembly distinguished by its tuning system.