Study on the Sound Field and Temperature Field Formed by Multi-elements Focused Lens

A new type multi-elements focused lens was presented.It is composed of seven single-element lens.The sound fields and temperature fields are caculated numerically and compared with the Multi-elements lens is different shape parameters and a single-element lens among the assembled lens.It is proved that the radial heating area of the Multi-elements lens is larger than the single-element lens which is fit to the shallow tissue.The optimum shape parameters of the focused lens are determined to get a larger focused area,and shorter treatment time.