ABSTRACT
This chapter describes the electromagnetic field configurations commonly used in the latter applications and the resulting specific energy absorption rates (SAR) distributions in phantoms and tumors. The Magnetic induction techniques consist of magnetic dipole sources that produce high frequency magnetic fields in tissue. The accurate calculation of SAR for realistic models of human anatomy facilitates qualitative understanding of situations for which magnetic induction methods may produce intratumoral temperature elevations to therapeutic levels. The initial temperature rise, after application of power, is proportional to SAR, so that measurement of a temperature distribution after pulsed heating has been used to study a variety of magnetic induction techniques. The most reported clinical experience has emphasized temperatures achieved in tumor, toxicity, patient tolerance, and frequency of palliation. The extensive theoretical, laboratory, and human clinical studies with magnetic induction techniques offer generally consistent conclusions regarding the advantages and disadvantages of these techniques.
