Open architecture iron core electromagnet for MRI using supercon

Details Open architecture iron core electromagnet for MRI using supercon Open architecture iron core electromagnet for MRI using supercon

1991-11-07

1993-10-05

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

G01R 3320

Patent

active

052509010

ABSTRACT:
A high T.sub.c superconductive electromagnet winding is advantageously employed as part of an MRI magnet structure having a pair of magnetically permeable poles opposingly disposed about the patient imaging volume. The magnetic circuit is otherwise completed by a magnetically permeable yoke structure having plural open apertures for easy access to the patient imaging volume. Still further advantage can be had by asymmetrically disposing a single superconductive electromagnet winding with respect to the patient image volume thereby eliminating the need for more than one cryostat. When high T.sub.c superconductive electromagnetic windings are utilized, a non-conductive composite cryostat may also be used to further reduce spurious eddy current fields. When an asymmetric single high T.sub.c superconductive electromagnet coil is utilized, an asymmetric electromagnet shim winding may also be employed so as to further increase the magnetic field homogeneity within what is now an asymmetrically located patient imaging volume within the air gap of the magnet structure.

REFERENCES:
patent: 4534358 (1985-08-01), Young
patent: 4543959 (1985-10-01), Sepponen
patent: 4571568 (1986-02-01), Grangereau
patent: 4629989 (1986-12-01), Riehl
patent: 4634980 (1987-01-01), Misic
patent: 4714886 (1987-12-01), Halpern
patent: 4721914 (1988-01-01), Fukushima et al.
patent: 4829252 (1989-05-01), Kaufman
patent: 4885542 (1989-12-01), Yao et al.
Hall et al., "Some Observations on the Utility of High-Temperature Superconducting Coils in Whole-Body MR Imaging," Journal of Magnetic Resonance Imaging, Mar./Apr. 1991, pp. 207-208.
Crooks et al.: "High-Temperatures Superconductors: Will New Materials Take the Chill Off Our Magnets?," American Journal of Roentgenology, 149:223, 1987.
Tsuchiyama, Administrative Radiology VI (VI):44, 1987; "Supercon Breakthrough: A Critical Leap?,".
Pearce, Diagnostic Imaging, 9(7):118, 1987, Pearce: "MRI Insights".
U.S. application Ser. No. 07/786,828, filed Nov. 1, 1991.
U.S. application Ser. No. 07/546,112, filed Apr. 13, 1990.

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