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Radiation Protection Dosimetry Advance Access published online on June 11, 2007
Radiation Protection Dosimetry, doi:10.1093/rpd/ncm309
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© The Author 2007. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

OCCUPATIONAL EXPOSURE TO ELECTROMAGNETIC FIELDS IN PHYSIOTHERAPY DEPARTMENTS

I. Maccà*, M. L. Scapellato, M. Carrieri, A. Pasqua di Bisceglie, B. Saia and G. B. Bartolucci

Department of Environmental Medicine and Public Health, University of Padova, Via Giustiniani 2, 35128 Padova, Italy

* Corresponding author: isabella.macca{at}unipd.it

Received December 15, 2006, amended April 23, 2007, accepted April 23, 2007

To assess occupational exposure to electromagnetic fields, 11 microwave (MW), 4 short-wave diathermy and 15 magneto therapy devices were analysed in eight physiotherapy departments. Measurements taken at consoles and environmental mapping showed values above European Directive 2004/40/EC and ACGIH exposure limits at ~50 cm from MW applicators (2.45 GHz) and above the Directive magnetic field limit near the diathermy unit (27.12 MHz). Levels in front of MW therapy applicators decreased rapidly with distance and reduction in power; this may not always occur in work environments where nearby metal structures (chairs, couches, etc.) may reflect or perturb electromagnetic fields. Large differences in stray field intensities were found for various MW applicators. Measurements of power density strength around MW electrodes confirmed radiation fields between 30° and 150°, with a peak at 90°, in front of the cylindrical applicator and maximum values between 30° and 150° over the whole range of 180° for the rectangular parabolic applicator. Our results reveal that although most areas show substantially low levels of occupational exposure to electromagnetic fields in physiotherapy units, certain cases of over-occupational exposure limits do exist.


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