Methods for selectively dissolving and removing materials using ultra-high frequency ultrasound

A method of tissue dissolution comprising:

• providing a device comprised of at least one acoustical transducer and least one highly elastic layer having an outer boundary and providing an impedance mismatch interposed between the at least one acoustical transducer and a local region of the tissue;
• placing the device so that the at least one highly elastic layer of the at least one transducer is in contact with a surface of the local region of the tissue;
• generating by the at least one acoustical transducer, a plurality of acoustical waves comprising at least one series, wherein each acoustical wave is within an ultra-high frequency range;
• and
• applying the at least one series of the generated plurality of acoustical waves, wherein each acoustical wave possesses sufficient amplitude for the at least one series to dissolve the local region of the tissue via the at least one highly elastic layer;
• wherein the at least one series of the generated plurality of acoustical waves are in durations of ten to 100 cycles divided by the frequency;
• whereby the local region of the tissue is dissolved.