Patent ID: 8287472

Claim:
A device for thermal treatment of tissue within a living body, device comprising: a housing extending from a distal end to a proximal end, the housing including a first opening exposing an inner chamber of the device to the fluid, the housing being sized and shaped for insertion to a target location within the body; a piezoelectric element fixed within the housing and generating pulses of ultrasound energy directed substantially along a longitudinal axis of the housing; and first and second deflecting elements, the first deflecting element being mounted within the housing on a distal side of the piezoelectric element, the second deflecting element being mounted within the housing on a proximal side of the piezoelectric element, the first and second deflecting elements deflecting a portion of ultrasound energy from the piezoelectric element away from the axis of the housing so that the deflected ultrasound energy exits the housing via the first opening, one of the first and second deflecting elements including a plurality of protrusions scattering a portion of the energy deflected thereby and wherein one of the first and second deflecting elements is formed of a porous material with an interconnecting network of channels so that fluid flows through the one of the first and second deflecting elements that is formed of a porous material.