NDLI: A permanent magnet for whole-body NMR imaging

Content Provider	IEEE Xplore Digital Library
Author	Battocletti, J. Knox, T.
Copyright Year	1965
Abstract	Permanent magnets appear to provide a viable alternative to resistive and superconducting magnets for whole-body NMR imaging. Less expensive imaging systems, substantially reduced siting costs, and lower operating costs would be realized. Two dimensional (2D) and three dimensional (3D) finite element analysis (FEA) are used to optimize magnet design and to determine appropriate shimming to obtain the desired magnetic field homogeneity. Several innovations of both 2DFEA and 3DFEA are described in this paper. A whole-body permanent magnet will be constructed in 1985. Using ceramic 10 magnet material, a central magnetic field of approximately 0.15T (1500 gauss) can be obtained with an airgap of 50 cm, and a pole piece of 100 cm × 180 cm × 30 cm. A box-like support structure, with U-shaped sides, constrains the majority of magnetic flux to the vicinity of the magnet, increases the magnetic field in the airgap and improves field homogeneity. Weight of the magnet structure will be approximately 10,000 kg (11 tons). A homogeneity of 30 to 50 ppm is anticipated over a centrally-located 25 cm cube by appropriate mechanical shimming.
Sponsorship	IEEE Magnetics Society
Starting Page	1874
Ending Page	1876
Page Count	3
File Size	345134
File Format	PDF
ISSN	00189464
Volume Number	21
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1985-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Permanent magnets Magnetic resonance imaging Superconducting magnets Magnetic flux Magnetic fields Costs Magnetic materials Finite element methods Magnetic analysis Design optimization
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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