Superconducting MRI magnet with magnetic flux field homogeneity

Details Superconducting MRI magnet with magnetic flux field homogeneity Superconducting MRI magnet with magnetic flux field homogeneity

1991-12-26

1993-03-16

Arana, Louis

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

335216, 335296, G01V 300, H01F 700

Patent

active

051948109

ABSTRACT:
An open access superconducting MRI magnet includes a ferromagnetic frame open on at least two sides and having upper and lower end plates and at least two support posts. A superconducting coil assembly is mounted to each end plate for generating a magnetic flux field in a patient receiving area located between the end plates. A magnetic flux field shaping means is associated with each end plate. The flux field shaping means includes rose shims, inner rings mounted within the rose shims, and removable segments mounted to the rose shims. Transition plates are located between the support ports and end plates for minimizing flux leakage. In addition the end plates are formed with a varying thickness such that a cross section taken perpendicular to a return path of magnetic flux is substantially constant.

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