ABSTRACT
The interaction of electromagnetic fields with biological systems has attracted considerable interest in recent years. These fields are reported to have positive effects such as the enhancement of bone fracture healing and the use of hyperthermia as a cancer treatment. On the other hand there is concern regarding some potentially harmful effects of microwave and transmission line fields. Other chapters will discuss the details of many of these interactions. But in any such analysis it is important to relate the fields, currents and dissipated energy in the biological system to the externally applied fields. This chapter will survey the various types of mathematical models developed to determine that relationship.
