Magnetic field homogeneity adjustment method, magnet device, and magnetic resonance imaging apparatus

A computer executes: calculating a first volume distribution (v.d.) of magnetic materials on a shim tray, based on a first magnetic field strength distribution (m.f.s.d.) in a magnetic field space (S3); acquiring a first composite distribution (c.d.) representing a volume by addition of volumes of m...

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Bibliographic Details
Main Author Ando, Ryuya
Format Patent
LanguageEnglish
Published 12.06.2018
Subjects
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:A computer executes: calculating a first volume distribution (v.d.) of magnetic materials on a shim tray, based on a first magnetic field strength distribution (m.f.s.d.) in a magnetic field space (S3); acquiring a first composite distribution (c.d.) representing a volume by addition of volumes of magnetic materials for each region of the shim tray, and positions of the regions (S5); calculating a virtual m.f.s.d. created by magnetic materials supposed to be arranged as in the first c.d. (S8); calculating a second m.f.s.d. by addition of the first m.f.s.d. and the virtual m.f.s.d. (S9); calculating a second v.d. of magnetic materials on the shim tray, based on the second m.f.s.d. (S3); acquiring a second c.d. representing a volume by addition of volumes of magnetic materials for each region, and positions of the regions (S5); and displaying the positions of regions and the volumes in the first c.d. and second c.d. (S10).
Bibliography:Application Number: US201314379587