Currents induced in anatomic models of the human for uniform and nonuniform power frequency magnetic fields.

  • Gandhi O
  • Kang G
  • Wu D
 et al. 
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We have used the quasi-static impedance method to calculate the currents induced in the nominal 2 x 2 x 3 and 6 mm resolution anatomically based models of the human body for exposure to magnetic fields at 60 Hz. Uniform magnetic fields of various orientations and magnitudes 1 or 0.417 mT suggested in the ACGIH and ICNIRP safety guidelines are used to calculate induced electric fields or current densities for the various glands and organs of the body including the pineal gland. The maximum 1 cm(2) area-averaged induced current densities for the central nervous system tissues, such as the brain and the spinal cord, were within the reference level of 10 mA/m(2) as suggested in the ICNIRP guidelines for magnetic fields (0.417 mT at 60 Hz). Tissue conductivities were found to play an important role and higher assumed tissue conductivities gave higher induced current densities. We have also determined the induced current density distributions for nonuniform magnetic fields associated with two commonly used electrical appliances, namely a hair dryer and a hair clipper. Because of considerably higher magnetic fields for the latter device, higher induced electric fields and current densities were calculated.

Author-supplied keywords

  • Anatomic
  • Biophysical Phenomena
  • Biophysics
  • Electric Impedance
  • Head
  • Humans
  • Magnetics
  • Magnetics: adverse effects
  • Models
  • Organ Specificity

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  • O P Gandhi

  • G Kang

  • D Wu

  • G Lazzi

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