Abstract #3231
Trial of safe working procedure against occupational SMF exposure - evaluation of its effectiveness in occupational SMF exposure levels and work performances among 3 T MRI system users -
Sachiko Yamaguchi-Sekino 1 , Masaki Sekino 2 , and Toshiharu Nakai 3
1
National Institute of Occuaptional Safety
and Health, Japan, Kawasaki, Kanagawa, Japan,
2
Graduate
School of Engineering, The University of Tokyo, Tokyo,
Japan,
3
Neuroimaging
& Informatics, National Center for Geriatrics and
Gerontology, Aichi, Japan
Occupational exposure to the static magnetic field (SMF)
is an arising problem in operators of magnetic resonance
imaging (MRI) system. Although the individual motion
control is recommended for MR workers to prevent these
temporal effects, more feasible safe working procedure
is required to achieve the compliance monitoring. The
present study set 30 cm of the approach restricted area
from the end of 3 T MRI system instead of the individual
motion control. The average of the maximum SMF exposure
among subjects was decreased in 25 % by this action (
t
-test,
p
<0.01).
And motion analysis by motion capture indicated that
work performances were not affected under this action.
These results suggest that this simple safe working
procedure is applicative for MR workers to reduce
occupational SMF exposure without remarkable changes in
work performances. And the quantification of MR workers
motions by motion capture provides the useful
information for electromagnetic field dosimetry.
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