Minimizing the induced fields in MRI Occupational Workers by Lowering the Imager

Trakic, A., Wang, H., Liu, F., Sanchez Lopez, H., Weber, E. and Crozier, S. (2008) Minimizing the induced fields in MRI Occupational Workers by Lowering the Imager. Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering, 33B 1: 39-54. doi:10.1002/cmr.b.20102


Author Trakic, A.
Wang, H.
Liu, F.
Sanchez Lopez, H.
Weber, E.
Crozier, S.
Title Minimizing the induced fields in MRI Occupational Workers by Lowering the Imager
Journal name Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering   Check publisher's open access policy
ISSN 1552-5031
Publication date 2008-01-01
Year available 2008
Sub-type Article (original research)
DOI 10.1002/cmr.b.20102
Open Access Status Not yet assessed
Volume 33B
Issue 1
Start page 39
End page 54
Total pages 16
Editor Trificante, D.D.
Place of publication USA
Publisher John Wiley & Sons Inc
Language eng
Subject C1
730208 Occupational health (excl. economic development aspects)
970109 Expanding Knowledge in Engineering
090303 Biomedical Instrumentation
Abstract In magnetic resonance imaging (MRI), healthcare workers can be exposed to strong static and time-varying magnetic fields outside the imager. Body motion through the large, spatially nonuniform static magnetic field generated by the main magnet and exposure to low-frequency magnetic fields from pulsed gradient coils can lead to the stimulation of electric fields in the body. Tissue of the central and peripheral nervous system (CPNS) in the head and torso is particularly susceptible. To protect occupational workers, the member states of the European Union are required to incorporate the physical agents directive (PAD) 2004/40/EC into their legislation, which could restrict the use of MRI in some cases. This article reports a rather simple and general method/solution that can notably reduce the head/trunk exposure of MRI operators to both static and (low-frequency) time-dependant magnetic fields in MRI. It is numerically shown that the upper body CPNS exposure can be reduced by factors of up to 50 or more, when the MRI machine is simply lowered by 1 m in height relative to the ground floor. The proposed approach can lead to significantly reduced in situ electric fields/current in the upper body and thus allow faster worker motions around the lowered imager. © 2008 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson Engineering) 33B: 39-54, 2008
Keyword MRI
Physical agents directive
Magnetic Field
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Information Technology and Electrical Engineering Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 7 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 15 Apr 2009, 22:52:43 EST by Ms Kimberley Nunes on behalf of School of Information Technol and Elec Engineering