NDLI: Accurate and convenient evaluation method of magnetic field

Content Provider	IEEE Xplore Digital Library
Author	Takeshima, H.
Copyright Year	1965
Abstract	An evaluation method for the magnetic field employed in an MRI (magnetic resonance imaging) system is described. In the past, the magnetic-field distribution was approximated by a linear combination of spherical harmonics, and the coefficients were used for the evaluation of the field homogeneity. The accuracy of the evaluation method presented is demonstrated by comparisons between field distributions computed from the coefficients and measurements. The results give an estimate for the number of coefficients needed for a good approximation. The contour map computed in this way conveniently given the field distribution from measurements at only a few points. The image distortion estimated from the field distribution is demonstrated to be a valuable index for evaluating the specification of the magnetic circuit in an MRI system.<>
Sponsorship	IEEE Magnetics Society
Starting Page	2571
Ending Page	2573
Page Count	3
File Size	334198
File Format	PDF
ISSN	00189464
Volume Number	26
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic fields Magnetic field measurement Magnetic resonance imaging Distortion measurement Distributed computing Frequency Laplace equations Magnetic circuits Biomedical imaging Medical diagnostic imaging
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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