Ultrasound catheter system having modulated output with feedback control

(57) The method and equipment for driving the ultrasonic transducer (14) connected with the ultrasonic transfer component arranged in a long and slender summary catheter (10) have the modulated output, and use feedback control. While amplitude changes, a modulating signal 連続 / temporal duration modulates an ultrasonic transducer drive signal. The acquired ultrasonic transducer drive signal which was modulated has continuous temporal duration similarly, and there is no intermittent acceleration leading to the stress impressed to the ultrasonic transfer component in the equipment of the conventional technology. In order that the current of the modulated drive signal may be monitored and the voltage may supply a feedback signal, it answers and changes to current. Transfer component breakage alarm, When driving energy is compared to a feedback control signal and desired supersonic vibration has a perfect ultrasonic transfer component, for the ultrasonic signal of such a request. When having reached the driving energy level smaller than the minimum above-mentioned driving energy level needed is shown, directions of breakage of a transfer component are offered.