Localized Eddy Current Compensation Using Quantitative Field Mapping

Melissa Terpstra, Peter M Andersen, R. Gruetter

Research output: Contribution to journalEditorial

53 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Pages (from-to)139-143
Number of pages5
JournalJournal of Magnetic Resonance
Volume131
Issue number1
DOIs
StatePublished - Jan 1 1998

Fingerprint

Eddy currents
eddy currents
Interventional Magnetic Resonance Imaging
Magnets
projection
adjusting
conduction
Magnetic resonance imaging
magnets
Compensation and Redress
gradients
cavities
causes
decay

Keywords

  • Eddy currents
  • In vivo, H NMR
  • Rat brain

Cite this

Localized Eddy Current Compensation Using Quantitative Field Mapping. / Terpstra, Melissa; Andersen, Peter M; Gruetter, R.

In: Journal of Magnetic Resonance, Vol. 131, No. 1, 01.01.1998, p. 139-143.

Research output: Contribution to journalEditorial

Terpstra, Melissa ; Andersen, Peter M ; Gruetter, R. / Localized Eddy Current Compensation Using Quantitative Field Mapping. In: Journal of Magnetic Resonance. 1998 ; Vol. 131, No. 1. pp. 139-143.
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