Electromagnetic field focusing system in the treatment of brain tumors

Arun Angelo Patil, William S. Yamanashi, J. L. Valentine, Deborah Hill

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


The electromagnetic field focusing (EFF) probe, which is based on the principle of eddy current convergence, produces intense pinpoint heat at its point of contact with tissue. This allows cutting and vaporization of tissue and coagulation of vessels. The present experiments were conducted to study heat distribution to the surrounding tissue in brain and phantom and the effect on the brain of vaporization of intracerebral tumors in 19 rabbits. The follow-up period was as long as 47 days. The heating pattern showed a rise of temperature up to 250°C at the probe tip, with minimal or no temperature increase at 2 mm and beyond. Minimal or no change was noted in the surrounding brain after tumor vaporization, indicating that this system would be safe in the vaporization of brain tumors in clinical neurosurgery.

Original languageEnglish (US)
Pages (from-to)18-22
Number of pages5
Issue number1
StatePublished - 1988
Externally publishedYes


  • Brain tumor
  • Coagulation
  • Electromagnetic field focusing system
  • Vaporization

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology


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