SYSTEM AND METHOD FOR MEDICAL TREATMENT USING ULTRASOUND
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 phase-shifted drive signal that is coupled to an associated transducer element, effective to control grating lobe foci emitted by the array.
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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.
165 Citations
45 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 phase-shifted drive signal that is coupled to an associated transducer element, effective to control grating lobe foci emitted by the array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. 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 the drive signal, and a grating lobe phase shift portion adapted to produce a second phase shift in the drive signal, wherein each drive signal has a composite phase shift that is the mathematical sum of the first and second phase shifts, effective to cause the array to emit acoustic ultrasound signals having a focal point controlled by the first phase shift and grating lobe foci controlled by the second phase shift. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method for medical treatment of tissue using ultrasound, comprising the steps of:
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providing a probe having an array of transducer elements; generating at least one electrical ultrasound signal; generating from the at least one electrical ultrasound signal a plurality of phase-shifted drive signals; and coupling each phase-shifted drive signal to an associated transducer element, effective to control grating lobe foci emitted by the array. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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Specification