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1. EP0874247 - MRI head magnet

Office European Patent Office
Application Number 98303016
Application Date 20.04.1998
Publication Number 0874247
Publication Date 28.10.1998
Publication Kind B1
IPC
G01R 33/3815
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
28Details of apparatus provided for in groups G01R33/44-G01R33/6496
38Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
381using electromagnets
3815with superconducting coils, e.g. power supply therefor
A61B 5/05
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
05Measuring for diagnosis by means of electric currents or magnetic fields
A61B 5/055
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
05Measuring for diagnosis by means of electric currents or magnetic fields
055involving electronic or nuclear magnetic resonance, e.g. magnetic resonance imaging
G01R 33/3815
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
28Details of apparatus provided for in groups G01R33/44-G01R33/6496
38Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
381using electromagnets
3815with superconducting coils, e.g. power supply therefor
CPC
G01R 33/421
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
28Details of apparatus provided for in groups G01R33/44 - G01R33/64
42Screening
421of main or gradient magnetic field
G01R 33/3815
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
33Arrangements or instruments for measuring magnetic variables
20involving magnetic resonance
28Details of apparatus provided for in groups G01R33/44 - G01R33/64
38Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
381using electromagnets
3815with superconducting coils, e.g. power supply therefor
Applicants GEN ELECTRIC
Inventors LASKARIS EVANGELOS TRIFON
OGLE MICHELE DOLLAR
Priority Data 08837881 25.04.1997 US
Title
(DE) Magnet für Kopfuntersuchungen mittels der bildgebenden magnetischen Resonanz
(EN) MRI head magnet
(FR) Aimant pour des examens de la tête par IRM
Abstract
(EN)
The structure (110) includes a set of annular cylindrical coils (112,120) with respective set of coil segments extending longitudinally. The outer diameter of first coil segment is made higher than that of the second coil segment. A set of superconductive coils (126,132) are wound around the first and second coil segments, respectively. The lateral sides of the two superconductive coils are disposed between first and second longitudinal ends (116,118) of coil segments, respectively. A set of spacial rings (138,140) are attached to two coil segments, respectively. The two spacial rings abut lateral surfaces of the two superconductive coils, respectively. Several plates (142) are attached to spacer rings and equally extending radially outwards from spacer rings and superconductive coils.