| 摘要 |
The present invention provides a method, device and system for the removal of non-desired biological components from external surfaces of tissues. This, in accordance with the invention, is achieved utilizing ultrasound device and ultrasound-derived mechanisms employed essentially externally to the external surfaces of tissues to be affected, and while keeping the said tissues intact with respect to the impact of the bulk of the affected ultrasound. The method, in accordance with the invention, comprises accordingly exposing the supportive medium coupling between the ultrasonic emitting source, and the external surfaces to be affected, to a relatively low frequency ultrasound stimulus emitted at certain angle with respect to the surfaces to be affected, whereas said stimulus being such as to create essentially non-thermal ultrasonic derived phenomena in the said coupling medium for impacting the external surfaces of the desired tissues. The system of the invention generally comprises elements supporting formation of the desired ultrasound phenomena, and at desired location and angle. It is comprised of control unit, a single or a multi-frequency signal generator, a signal amplifier, a matching unit, treatment chamber, and at least one transducer. Occasionally multiple transducers, or multi-frequency transducer, or transducers of different types including phase array, may be used to create different effects at pre-determined locations of external surfaces, where treatment is conducted in treatment-chamber via coupling medium. The system therefore further contains coupling medium, in which phenomena are created and through which impact is performed onto the external surfaces of tissue.
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