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Biomag 96 pp 28-31 | Cite as

Magnetic Measurement Techniques for Locating Foreign Bodies in Humans

  • E. Costa Monteiro
  • C. Kelber
  • E. Andrade Lima
  • P. Costa Ribeiro
  • A. C. Bruno
  • C. Hall Barbosa
  • E. Parente Ribeiro
  • P. Boechat

Abstract

There is a high incidence of needles accidentally introduced in the human body. The commonly used radiological techniques present several limitations. They usually do not give the appropriate informations for a surgical extraction procedure, like the depth relative to the skin and only the neddle projections are available. The development of a more accurate, non-invasive and innocuous method for a magnetic foreign body localization is of meaningful clinical importance. In this way, non-invasive magnetic field measurements, using a SQUID magnetometer, were performed to locate, for surgical purposes, needles lost in the bodies of 5 children. Also, another approach for detecting magnetic fields generated by foreign bodies, using a fluxgate magnetometer, is proposed.

Keywords

Foreign Body Remanent Magnetization Squid Magnetometer Magnetic Mapping Full Bladder 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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    Ilmoniemi, R.J., Williamson, S.J., Kaufman, L., Weinberg, H.J. and Boyd, A.D., Method for Locating a Small Magnetic Object in the Human Body, IEEE Trans. Biomed.Eng., 1988, 35–7: 561–564.CrossRefGoogle Scholar
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    Reitz, J.R., Milford, F.J., Foundations of Electromagnetic Theoiy, Reading, Addison-Wesley, 2nd. ed, 1967.Google Scholar
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    Roth, B. J., Sato, 3., Accurate and efficient formulas for averaging the magnetic field over a circular coil, In: Hoke, M. et al., Biomagnetism: Clinical Aspects, Excerpta Medica, 1992, p. 797–800.Google Scholar

Copyright information

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • E. Costa Monteiro
    • 1
  • C. Kelber
    • 1
  • E. Andrade Lima
    • 1
  • P. Costa Ribeiro
    • 1
  • A. C. Bruno
    • 1
  • C. Hall Barbosa
    • 1
  • E. Parente Ribeiro
    • 1
  • P. Boechat
    • 2
  1. 1.Departamento de FísicaPontifícia Universidade CatólicaRio de JaneiroBrazil
  2. 2.Hospital Fernandes FigueirasRio de JaneiroBrazil

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