System and method for ultrasound treatment using grating lobes
First Claim
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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, anda 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.
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Abstract
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.
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Citations
12 Claims
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1. A system for medical treatment of tissue using ultrasound, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification