Abstract: The invention relates to a device for generating an ultrasonic field having frequencies between 0.9 MHz and 4 MHz in an object, preferably in water or in human tissue, the device comprising a piezo element (1) affixed to a coupling plate (5), the coupling plate emitting the ultrasonic field (6) into the object, wherein the dimensions of the coupling plate are chosen such that the intensity of the ultrasonic field (6) emitted into the object is minimized in a depth deeper than 70 mm.
Abstract: The application pertains to a medical device including a treatment unit for treating patients, an activation device for activating the treatment unit, and an input device for entering an activation code, the input device being coupled to the activation device, and the activation device is arranged to activate the treatment unit for a limited number of treatments and/or for a limited period when a predetermined activation code is entered via the input device.