creators_name: Forbes, LK
creators_name: Brideson, MA
creators_name: Crozier, S
creators_name: While, PT
creators_id: Larry.Forbes@utas.edu.au
creators_id: Michael.Brideson@utas.edu.au
creators_id: 
creators_id: Peter.While@utas.edu.au
type: article
datestamp: 2008-04-07 14:28:13
lastmod: 2008-11-20 23:53:21
metadata_visibility: show
title: Calculating the movement of MRI coils, and minimizing their noise
ispublished: pub
subjects: 249902
full_text_status: restricted
abstract: The design of gradient coils within Magnetic Resonance Imaging equipment is considered. These coils produce linear magnetic fields in each of the three orthogonal directions in physical space. In addition, they are turned on and off repeatedly to enhance the clarity of the image, but this produces a great deal of noise within the coil, as its shape distorts under the influence of Lorentz forces. We present a method for calculating the movement of the coil in the background magnetic field, and estimating the consequent noise levels. This involves solving for the current density in the coil coupled with equations for its elastic deformation, along with acoustic equations for the pressure in the surrounding air. Winding patterns are designed to minimize the noise produced by the Magnetic Resonance Imaging coil.

date: 2007-09-15
date_type: published
publication: ANZIAM Journal
volume: 49
publisher: Australian Mathematics Publ Assoc Inc
pagerange: C17-C35
refereed: TRUE
issn: 1446-1811
official_url: http://anziamj.austms.org.au/ojs/index.php/ANZIAMJ/article/view/319
citation: Forbes, LK and Brideson, MA and Crozier, S and While, PT (2007) Calculating the movement of MRI coils, and minimizing their noise. ANZIAM Journal, 49 . C17-C35. ISSN 1446-1811
document_url: http://eprints.utas.edu.au/4221/1/4221.pdf