Visualization of interfering RF-electric fields in a lossy liquid simulating a patient´s body in a hyperthermia treatment by a LED-matrix

Matrices Of LED-dipoles have been constructed as a cheap and easy-to-use tool for Quality Assurance in deep body hyperthermia. Placed inside a phantom, i.e. a watertank filled with saline, one type of LED-matrix visualizes axial E-field components, the other one both radial components of the E field. By moving of the matrix plate, the components of the E field can be monitored in the complete inner volume of the phantom. Due to the feature of measurements in real time, LED-matrices are especially suitable to check numerous variations of set-up parameters as e.g. phase and amplitude settings as well as the performance of deep body hyerthermia systems in clinical routine.