Patent ID: 9132287
Filing Date: 2015-09-15
Classification: A61N

Abstract:
1. A system for medical treatment of tissue using ultrasound, comprising: a probe having an array of transducer elements; an ultrasound waveform generator adapted to generate at least one electrical ultrasound signal; and a plurality of phase controls coupled to the ultrasound waveform generator, each phase control adapted to generate from the at least one electrical ultrasound signal a drive signal that is coupled to an associated transducer element, the phase controls comprising: a focusing phase shift portion adapted to produce a first phase shift in each of the drive signals configured to cause the array to emit acoustic ultrasound energy having a single focal point, and a grating lobe phase shift portion adapted to produce a second phase shift in each of the drive signals configured to control locations of a plurality of grating lobe foci along an azimuthal axis of the array, wherein each of the drive signals has a composite phase shift that is the mathematical sum of the first and second phase shifts.