Scanned microwave hyperthermia for the treatment of superficial malignancies

A scanned microwave hyperthermia system is described. The system uses a computer controlled robot mechanism to scan a purpose-built microwave antenna over the treatment site following a pre-calculated trajectory. This provides control over local power deposition and enables highly uniform temperature profiles to be produced over large superficial areas. Temperature data recorded during a typical hyperthermia treatment session show a satisfactory level of thermal uniformity at measured points in the treatment volume. A minimum tumour temperature of 42°C was maintained during the treatment period of 60 minutes and no excessive heating or patient discomfort was reported.