Ultrasound is a mechanical wave which can penetrate the tissue without ionizing radiation injury. Using Angel’s TS-1000 HIFU system, the patient does not require anesthetics because each sonication is completed before the nervous system senses pain. The main characteristic of the TS-1000 HIFU system is to generate an ultrasonic wave outside the patient's body, and focus the energy with its focal point at the target tissue (such as a tumour) with very short irradiation time (of 0.1 second, well before the 0.3 seconds at which the human nervous system reacts to pain). This causes the focused region to rapidly heat (to about 70 degrees Celsius), which starts rapidly destroying tumour cells via protein necrosis, without causing damage to the normal tissue surrounding the tumour.

According to the shape of the target tumour, the surgeon can direct the system to automatically plan the treatment irradiation range, until the entire treatment is completed. TS-1000 HIFU system combines ultrasound imaging and high intensity focused ultrasound to non-invasively treat tumours without the need for incisions and anesthetics. The ultrasound waves are directed from a transducer and the focal point can be positioned as deep as 150mm. Tight focusing is designed to limit the effect to
the targeted location.

During treatment, the physician visually examines the tumour via the ultrasound scanner and defines the area to be treated. The target region is defined using a specialized ultrasound diagnostics imaging system synchronized to the treatment system. The target region is then programmed into the treatment system. According to the size and shape of the target region, the system’s controlling and processing systems automatically control the sonication process. Additionally, during treatment, the ultrasound diagnostics imaging system provides real-time feedback of the treatment to the physician.