Abstract
A microwave system was designed and constructed which provides controlled, localized hyperthermia in the tumors of four experimental animals. The components of the system are a 2.45-GHz microwave source, a four-way power-dividing network and reflected power monitor, a temperature-controlled microwave power regulator, and small direct-contact microwave applicators. Adjustment of the temprature control results in elevated temperatures in the centers of tumors which can be maintained to within /spl plusmn/ 0.1/spl deg/C without production of significant whole body hyperthermia.The temperatures at the edges of the locally heated tumors were found to vary within /spl plusmn/1.0/spl deg/C of the center temperature. The system is currently being used to evaluate the therapeutic potential of sustained Iocalized hyperthermia in small tumors implanted subcutaneously in mice.
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