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Designing 3D gradient coils for open MRI systems


While, PT and Forbes, LK and Crozier, S, Designing 3D gradient coils for open MRI systems, Proceedings of the International Society for Magnetic Resonance in Medicine - Joint Annual Meeting ISMRM-ESMRMB, 1-7 May 2010, Stockholm, Sweden, pp. 3938. (2010) [Non Refereed Conference Paper]

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Traditionally, gradient coil windings are constrained to lie on cylindrical or planar surfaces and their precise locations are found such that they optimise coil properties such as gradient homogeneity, inductance and coil efficiency. To address secondary concerns such as eddy current induction, peripheral nerve stimulation, acoustic noise and overheating, other interesting geometries have been explored. While et al. introduce a 3D gradient coil design method in which the precise 3D geometry of the coil windings is found as part of the optimisation. Results display an interesting combination of closed loops and spiral-type windings that lie approximately on the surfaces of sets of elliptical tori. The efficiency and manufacturability of these 3D windings are improved by While et al. with the design of toroidal gradient coils of high gradient homogeneity, low inductance, high efficiency and good force balancing, which also offer perceived benefits to gradient cooling and patient claustrophobia. One standard method of reducing patient claustrophobia and improving patient access is to use open biplanar systems, however this comes at the cost of lower coil efficiency. Alternative 3D coil windings for this open-type MRI system are explored here using an adaptation to the theoretical 3D gradient coil design method of While et al.

Item Details

Item Type:Non Refereed Conference Paper
Keywords:magentic resonance imaging, MRI, gradient coil windings, design optimisation
Research Division:Mathematical Sciences
Research Group:Applied mathematics
Research Field:Applied mathematics not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the mathematical sciences
UTAS Author:While, PT (Dr Peter While)
UTAS Author:Forbes, LK (Professor Larry Forbes)
ID Code:65628
Year Published:2010
Deposited By:Mathematics
Deposited On:2010-11-26
Last Modified:2013-01-07
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