Abstract: An ultrasound system is provided which includes a therapy ultrasound transducer and a diagnostic ultrasound transducer and operates in accordance with a method to direct the application of the therapy ultrasound. The method includes operating the diagnostic ultrasound transducer to acquire a first ultrasound image; simultaneously operating the diagnostic ultrasound transducer and therapy ultrasound transducer for a second interval to acquire a second ultrasound image; and determining a difference in the first and second images indicative of the pattern of the therapy ultrasound transducer signal. The difference in the images, which result from enhanced non-linearities and propagation distortions induced by the high intensity therapy ultrasound, can be obtained by subtracting the two images.

Abstract: The present invention relates to a vortex bubble removing and cooling system for the electromagnetic shock wave generator in the lithotripter. The vortex bubble-removing and cooling system comprises a water-full cushion (17), a metal diaphragm (14) installed inside the chamber body (27) of the water cushion (17) and a coil (13) which is installed at the backside of the metal diaphragm (14). There is at least one first water nozzle (22) on the side wall of the chamber body (27) and a water suction tube (23) at the center of the chamber body (27). The first water nozzle (22) and the water suction tube (23) form a vortex-generating device. The vortex generated inside the chamber body will scour the surface of the metal diaphragm continuously so as to cool the heat and remove the air bubble. This will make the metal diaphragm be in good working condition and greatly increase the working life of the metal diaphragm and the coil.