Numerical field evaluation of healthcare workers when bending towards high-field MRI magnets

Wang, H., Trakic, A., Liu, F. and Crozier, S. (2008). Numerical field evaluation of healthcare workers when bending towards high-field MRI magnets. In: F. W. Wehril, Magnetic Resonance in Medicine: Proceedings of the International Society for Magnetic Resonance in Medicine. ISMRM 16th Annual Scientific Meeting and Exhibition, Toronto, Ontario, Canada, (410-422). 3-9 May, 2008. doi:10.1002/mrm.21441


Author Wang, H.
Trakic, A.
Liu, F.
Crozier, S.
Title of paper Numerical field evaluation of healthcare workers when bending towards high-field MRI magnets
Conference name ISMRM 16th Annual Scientific Meeting and Exhibition
Conference location Toronto, Ontario, Canada
Conference dates 3-9 May, 2008
Proceedings title Magnetic Resonance in Medicine: Proceedings of the International Society for Magnetic Resonance in Medicine   Check publisher's open access policy
Journal name Magnetic Resonance in Medicine   Check publisher's open access policy
Place of Publication Baltimore, Md. U.S.A.
Publisher Wiley
Publication Year 2008
Sub-type Fully published paper
DOI 10.1002/mrm.21441
ISSN 1522-2594
0740-3194
Editor F. W. Wehril
Volume 59
Issue 2
Start page 410
End page 422
Total pages 13
Collection year 2009
Language eng
Abstract/Summary In MRI, healthcare workers may be exposed to strong static and dynamic magnetic fields outside of the imager. Body motion through the strong, non-uniform static magnetic field generated by the main superconducting magnet and exposure to gradient-pulsed magnetic fields can result in the induction of electric fields and current densities in the tissue. The interaction of these fields and occupational workers has attracted an increasing awareness. To protect occupational workers from overexposure, the member states of the European Union are required to incorporate the Physical Agents Directive (PAD) 2004/40/EC into their legislation. This study presents numerical evaluations of electric fields and current densities in anatomically equivalent male and female human models (healthcare workers) as they lean towards the bores of three superconducting magnet models (1.5, 4, and 7 T) and x-, y-, and z- gradient coils. The combined effect of the 1.5 T superconducting magnet and the three gradient coils on the body models is compared with the contributions of the magnet and gradient coils in separation. The simulation results indicate that it is possible to induce field quantities of physiological significance, especially when the MRI operator is bending close towards the main magnet and all three gradient coils are switched simultaneously. Magn Reson Med 59:410-422, 2008. © 2008 Wiley-Liss, Inc.
Subjects C1
970109 Expanding Knowledge in Engineering
090399 Biomedical Engineering not elsewhere classified
730208 Occupational health (excl. economic development aspects)
Keyword MRI
electric fields
human models
Superconducting Magnet
Gradient Coil
Q-Index Code C1
Q-Index Status Confirmed Code

 
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