EFFICIENTLY SHIELDED MRI GRADIENT COIL WITH DISCRETELY OR CONTINUOUSLY VARIABLE FIELD OF VIEW

Title:

EFFICIENTLY SHIELDED MRI GRADIENT COIL WITH DISCRETELY OR CONTINUOUSLY VARIABLE FIELD OF VIEW

Document Type and Number:

WIPO Patent Application WO2002099450

Kind Code:

A3

Abstract:

A gradient coil assembly generates magnetic field gradients across the main magnetic field of a magnetic resonance imaging apparatus and includes a primary gradient coil (22p) switchable between a first configuration which generates magnetic field gradients which are substantially linear over a first useful imaging volume, and a second configuration which generates magnetic field gradients which are substantially linear over a second useful imaging volume. A first shield coil set (22s1) is complimentary to the primary gradient coil in one of the first and second configurations, and a second shield coil set (22s2), when either used alone or in combination with the first shield coil, is complimentary to the other of the first and second configurations.

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Inventors:

DEMEESTER GORDON D
MORICH MICHAEL A
SHVARTSMAN SHMARYU

Application Number:

PCT/US2002/017832

Publication Date:

February 03, 2005

Filing Date:

June 04, 2002

Export Citation:

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Assignee:

KONINKL PHILIPS ELECTRONICS NV (NL)
PHILIPS MED SYST INC (US)

International Classes:

A61B5/055; G01R33/385; G01R33/421; G01R33/3875; (IPC1-7): G01R33/385

Foreign References:

US5736858A	1998-04-07
DE19955117A1	2001-05-23
DE19851584C1	2000-04-20
US6236208B1	2001-05-22
US5311135A	1994-05-10

Other References:

HARVEY P R ET AL: "MODULAR GRADIENT COIL: A NEW CONCEPT IN HIGH-PERFORMANCE WHOLE-BODYGRADIENT COIL DESIGN", MAGNETIC RESONANCE IN MEDICINE, ACADEMIC PRESS, DULUTH, MN, US, vol. 42, no. 3, September 1999 (1999-09-01), pages 561 - 570, XP000859169, ISSN: 0740-3194
KIMMLINGEN R ET AL: "Gradient system with continuously variable field characteristics", INTERNATIONAL SOCIETY FOR MAGNETIC RESONANCE IN MEDICINE. 8TH SCIENTIFIC MEETING AND EXHIBITION. ISMRM '2000. PHILADELPHA, PA, APRIL 1 - 7, 2000, INTERNATIONAL SOCIETY OF MAGNETIC RESONANCE IN MEDICINE. SCIENTIFIC MEETING AND EXHIBITION, BERKELEY, CA, vol. CD-ROM, 1 April 2000 (2000-04-01), pages 332, XP002209875

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