Ultrasound transducer with focused ultrasound refraction plate

A system for vibrational heating of tissue with ultrasonic energy, comprising:

• a spherical ultrasound transducer having a spherical surface for generating a spherical wave of ultrasonic energy in a direction toward a single focal region;
• and
• a refraction plate disposed between the spherical ultrasound transducer and the focal region for refracting said spherical wave of ultrasonic energy to a plurality of refraction focal regions, said refraction plate comprising an array of refracting elements in the shape of four sided pyramids for refracting the spherical wave of ultrasonic energy and generating four refraction focal regions.

A system for vibrational heating of tissue with ultrasonic energy, comprising:

• a spherical ultrasound transducer having a spherical surface for generating a spherical wave of ultrasonic energy in a direction toward a single focal region;
• and
• a refraction plate disposed between the spherical ultrasound transducer and the focal region for refracting said spherical wave of ultrasonic energy to a plurality of refraction focal regions, said spherical ultrasound transducer having a spherical surface of a first radius of curvature and said refraction plate having a first surface facing the transducer and a second surface facing the focal region and comprising a plurality of refracting surfaces in the form of an array of four-sided pyramid shapes with the apex of each of said pyramids pointing away from the second surface.