Simple estimation of induced electric fields in nervous system tissues for human exposure to non-uniform electric fields at power frequency
| Autor: | Hiroo Tarao, Hironobu Miyamoto, Leena Korpinen, Noriyuki Hayashi, Katsuo Isaka |
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| Přispěvatelé: | Tampere University, Department of Electronics and Communications Engineering, Research group: Environmental Health |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Male
Models Anatomic Work (thermodynamics) 02 engineering and technology Nervous System 030218 nuclear medicine & medical imaging 03 medical and health sciences Electromagnetic Fields 0302 clinical medicine Nuclear magnetic resonance Position (vector) Distortion Electric field 0202 electrical engineering electronic engineering information engineering Humans Dosimetry Radiology Nuclear Medicine and imaging Radiometry Physics Radiological and Ultrasound Technology Human head 213 Electronic automation and communications engineering electronics Electric Conductivity 020206 networking & telecommunications Mechanics 217 Medical engineering Radiation Exposure Conductor Current (fluid) Neck |
| Popis: | Most results regarding induced current in the human body related to electric field dosimetry have been calculated under uniform field conditions. We have found in previous work that a contact current is a more suitable way to evaluate induced electric fields, even in the case of exposure to non-uniform fields. If the relationship between induced currents and external non-uniform fields can be understood, induced electric fields in nervous system tissues may be able to be estimated from measurements of ambient non-uniform fields. In the present paper, we numerically calculated the induced electric fields and currents in a human model by considering non-uniform fields based on distortion by a cubic conductor under an unperturbed electric field of 1 kV m-1 at 60 Hz. We investigated the relationship between a non-uniform external electric field with no human present and the induced current through the neck, and the relationship between the current through the neck and the induced electric fields in nervous system tissues such as the brain, heart, and spinal cord. The results showed that the current through the neck can be formulated by means of an external electric field at the central position of the human head, and the distance between the conductor and the human model. As expected, there is a strong correlation between the current through the neck and the induced electric fields in the nervous system tissues. The combination of these relationships indicates that induced electric fields in these tissues can be estimated solely by measurements of the external field at a point and the distance from the conductor. publishedVersion |
| Databáze: | OpenAIRE |
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