System and method for ultrasound treatment using grating lobes

摘要

A system and method for medical treatment of tissue using ultrasound. The system comprises 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, each coupled to the ultrasound waveform generator and adapted to generate from the electrical ultrasound signal a phase-shifted drive signal that is coupled to an associated transducer element. The drive signal is effective to control grating lobe foci emitted by the array. The method employs the system.

主权项

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.