HistoSonics’ Edison system uses a water-filled membrane to transmit focused ultrasound into the body. The resulting bubbles expand and collapse within the tumor, producing mechanical stress that destroys cancer cells and liquefies the tumor.For many years, doctors and technicians who performed medical ultrasound procedures viewed bubbles with wary concern. The phenomenon of cavitation—the formation and collapse of tiny gas bubbles due to changes in pressure—was considered an undesirable and larg...