ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Development of 7-Year-Old Korean Child Model for Computational Dosimetry

  • Lee, Ae-Kyoung (Broadcasting & Telecommunications Convergence Research Laboratory, ETRI) ;
  • Byun, Jin-Kyu (School of Electrical Engineering, Soongsil University) ;
  • Park, Jin-Seo (Department of Anatomy, Dongguk University College of Medicine) ;
  • Choi, Hyung-Do (Broadcasting & Telecommunications Convergence Research Laboratory, ETRI) ;
  • Yun, Jae-Hoon (Broadcasting & Telecommunications Convergence Research Laboratory, ETRI)
  • Received : 2008.10.27
  • Accepted : 2009.02.18
  • Published : 2009.04.30
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Abstract

A whole-body voxel model of a 7-year-old male volunteer was developed from 384 axial magnetic resonance images (MRIs). The MRIs were acquired with intervals of 3 mm for the entire body in a body coil. In order to reduce the MRI acquisition time for the child, the repetition and echo times under T1 weighted image were chosen to be 566 ms and 8 ms, respectively. The MRIs were classified according to 30 types of tissues with known electrical parameters. The developed voxel model was adjusted to the physical average of 7-year-old Korean boys. The body weight of the adjusted model, calculated with the mass tissue densities, is within a 6% difference from the 50th percentile weight.

Keywords

References

  1. 2006 WHO Research Agenda for Radio Frequency Fields, WHO, http://www.who.int/peh-emf/research/rf_research_agenda_2006.pdf.
  2. E. Rongen et al., “Mobile Phones and Children: Is Precaution Warranted?” Bioelectromagnetics, vol. 25, 2004, pp. 142-144. https://doi.org/10.1002/bem.10200
  3. Report on the Fifth Survey of Korean Anthropometry, Korean Agency for Technology and Standards, Ministry of Commerce, Industry and Energy, Nov. 2004 (in Korean).
  4. A.K. Lee et al., “Development of Korean Male Body Model for Computational Dosimetry,” ETRI J., vol. 28, no. 1, Feb. 2006, pp. 107-110. https://doi.org/10.4218/etrij.06.0205.0024
  5. C. Gabriel, Compilation of the Dielectric Properties of Body Tissues at RF and Microwave Frequencies, Brooks Air Force Technical Report AL/OE-TR-1996-0037, 1996.
  6. J.S. Park et al., “Technical Report on Semiautomatic Segmentation Using the Adobe Photoshop,” J. Digital Imaging, vol. 18, 2005, pp. 333-343. https://doi.org/10.1007/s10278-005-6704-1
  7. P.A. Mason et al., “Effects of Frequency, Permittivity, and Voxel Size on Predicted Specific Absorption Rate Values in Biological Tissue During Electromagnetic-Field Exposure,” IEEE Trans. Microwave Theory Tech., vol. 48, no. 11, 2000, pp. 2050-2058. https://doi.org/10.1109/22.884194
  8. C. Lee et al., “Hybrid Computational Phantoms of the Male and Female Newborn Patient: NURBS-Based Whole-Body Models,” Phys. Med. Biol., vol. 52, 2007, pp. 3309-3333. https://doi.org/10.1088/0031-9155/52/12/001