A hyperthermia system for treating a patient, comprising: a treatment planning system; - an RF power unit; - one or more RF antennas connected to the RF power unit; - a controller, comprised in said treatment planning system, for adjusting the RF power source and/or the one or more RF antennas for a temperature-related profile; - a sensor for sensing a parameter representative of the RF field generated by the antennas; - a communication environment for inputting data from the said sensor, said communication environment being capable of generating trigger signals to the controller for in use steering said RF field by varying respective weights and phases of the antennas; the hyperthermia system being characterised by said communication environment being further capable of: - providing the treatment planning system with additional information provided by the patient, thereby adapting the RF antennas to adjust the temperature in an overheated area of the patient wherein said communication environment is further capable of - superposing a real-time temperature profile on patient diagnostic data using an anatomical model having characteristic points or areas; or - filling a look-up table of the hyperthermia system based on the patient's complaints or suggestions in respect to said areas, that is translated into a set of trigger signals in real time. a treatment planning system; - an RF power unit; - one or more RF antennas connected to the RF power unit; - a controller, comprised in said treatment planning system, for adjusting the RF power source and/or the one or more RF antennas for a temperature-related profile; - a sensor for sensing a parameter representative of the RF field generated by the antennas; - a communication environment for inputting data from the said sensor, said communication environment being capable of generating trigger signals to the controller for in use steering said RF field by varying respective weights and phases of the antennas; - an RF power unit; - one or more RF antennas connected to the RF power unit; - a controller, comprised in said treatment planning system, for adjusting the RF power source and/or the one or more RF antennas for a temperature-related profile; - a sensor for sensing a parameter representative of the RF field generated by the antennas; - a communication environment for inputting data from the said sensor, said communication environment being capable of generating trigger signals to the controller for in use steering said RF field by varying respective weights and phases of the antennas; the hyperthermia system being characterised by said communication environment being further capable of: - providing the treatment planning system with additional information provided by the patient, thereby adapting the RF antennas to adjust the temperature in an overheated area of the patient wherein said communication environment is further capable of - superposing a real-time temperature profile on patient diagnostic data using an anatomical model having characteristic points or areas; or - filling a look-up table of the hyperthermia system based on the patient's complaints or suggestions in respect to said areas, that is translated into a set of trigger signals in real time. - providing the treatment planning system with additional information provided by the patient, thereby adapting the RF antennas to adjust the temperature in an overheated area of the patient wherein said communication environment is further capable of - superposing a real-time temperature profile on patient diagnostic data using an anatomical model having characteristic points or areas; or - filling a look-up table of the hyperthermia system based on the patient's complaints or suggestions in respect to said areas, that is translated into a set of trigger signals in real time.