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1. (WO2009119837) METHOD OF CALCULATING COIL PATTERN, AND TILTED MAGNETIC FIELD COIL

Pub. No.:    WO/2009/119837    International Application No.:    PCT/JP2009/056374
Publication Date: Fri Oct 02 01:59:59 CEST 2009 International Filing Date: Sat Mar 28 00:59:59 CET 2009
IPC: A61B 5/055
G01R 33/385
Applicants: HITACHI MEDICAL CORPORATION
株式会社 日立メディコ
ABE, Mitsushi
阿部 充志
TAKESHIMA, Hirotaka
竹島 弘隆
Inventors: ABE, Mitsushi
阿部 充志
TAKESHIMA, Hirotaka
竹島 弘隆
Title: METHOD OF CALCULATING COIL PATTERN, AND TILTED MAGNETIC FIELD COIL
Abstract:
Manufacturability is increased by removing constraints on designing of a coil pattern and accuracy of a magnetic field is improved. A method of calculating a coil pattern is characterized by performing a step wherein a current potential is calculated at each contact between finite surface elements which constitute each coil surface based on an initial value of an input current potential distribution, and the current potential is repeatedly calculated for coil surfaces one after another so that a surface current represented by the current potential is closer to a target magnetic field distribution set for each of the finite surface elements, and a current potential distribution which generates a magnetic field within a range of allowable errors of each target magnetic field is obtained under the conditions of each magnetic field, and a step of determining the coil pattern from the contour lines of the obtained current potential distribution.