Nima Rostampour, Tinoosh Almasi, Masoumeh Rostampour, Khatereh Arabian, Ahmadreza Karami,
Volume 5, Issue 2 (10-2012)
A
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Background and Objectives: Biological effects of non-ionizing radiation on the body
of living organisms have been studied by researchers in recent years. High
Voltage medical equipments are one of the sources generating electromagnetic
fields. The electromagnetic field intensity of the medical equipment installed
at Hamadan
hospitals and the potential hazards were investigated. The main purpose of this
study was to determine the intensity of the electromagnetic field around high
voltage power supplies in radiology ward of the Hamadan hospitals.
Materials and Methods: This was a cross-sectional study and we investigated the electromagnetic fields
intensity around high voltage power supplies at Hamadan hospital wards. All measurements were
performed using a calibrated Tesla-meter (HI-3603). The measurements were
conducted at a range of distances varying from 25 cm to 3 m around the
supporting high voltage power supply.
Results: We found that
the maximum intensity of the magnetic and electric fields at a distance of less
than 1 m around the high voltage power supply was 29.625±5.738 mGauss and
25.17±0.92 V/m respectively, which is less than the safe amounts recommended by
the ICNIRP for occupational exposure (5000 mG and 10000 V/m) and even for
public exposure (1000 mG and and 5000 V/m). The minimum intensity of EM fields
for a less than 3 m distance was found to be 0.1±0.005 mGauss, which relates to
a CT-scanner system installed at Farshchian hospital. Among the whole
equipments evaluated in the current survey, the most intense magnetic and
electric field was found to be for imaging technician office, which was
3.050±0.004 mGauss and 128.88±0.05 V/m respectively it is lower than the
tolerances recommended by the ICNIRP.
Conclusion: According
to our results, it seems that the EM field occupational exposure for radiation
workers working at Hamadan
hospitals does not exceed the tolerances recommended by the ICNIRP. Therefore,
we did not find any issue related to the over-irradiation of non-ionizing among
the radiologists studied. It is recommended that different brands of generators
to be used in order to conduct a detailed and comprehensive study to compare
the intensity of the electrical and magnetic fields.
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