Localized eddy current compensation using quantitative field mapping.

Détails

ID Serval
serval:BIB_AE5A8619FDD9
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Localized eddy current compensation using quantitative field mapping.
Périodique
Journal of Magnetic Resonance
Auteur⸱e⸱s
Terpstra M., Andersen P.M., Gruetter R.
ISSN
1090-7807 (Print)
ISSN-L
1090-7807
Statut éditorial
Publié
Date de publication
1998
Volume
131
Numéro
1
Pages
139-143
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, P.H.S.Publication Status: ppublish
Résumé
Eddy current effects induced by switched gradients in proximal conducting structures are traditionally reduced by applying preemphasis currents whose amplitudes and decay characteristics must be set to offset the eddy current fields. We present an expeditious, localized, and quantitative method for mapping and adjusting the parameters for eddy current compensation. Mapping is based on analysis of projections as used in the fast automatic shimming technique by mapping along projections (FASTMAP). Adjustment methods are demonstrated in high-field horizontal bore systems. The proposed localized eddy current mapping technique may also be used for localized measurements in situations where asymmetric conducting structures may cause nonlinear eddy current fields, such as in interventional MRI and open magnet designs.
Mots-clé
Algorithms, Animals, Brain/metabolism, Equipment Design, Image Enhancement/methods, Image Processing, Computer-Assisted/methods, Magnetic Resonance Imaging/instrumentation, Magnetic Resonance Imaging/methods, Magnetic Resonance Spectroscopy/instrumentation, Magnetic Resonance Spectroscopy/methods, Radiology, Interventional, Rats
Pubmed
Web of science
Création de la notice
04/08/2010 16:28
Dernière modification de la notice
20/08/2019 16:18
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