Shear mode therapeutic ultrasound
First Claim
1. A method of delivering ultrasound signals using shear waves, the method comprising applying first longitudinal waves of at least a first ultrasound beam to a subject at at least a first incident angle relative to a first surface of the subject such that the first longitudinal waves are converted to first shear waves in the subject and are converted to second longitudinal waves at a second surface of the subject, energy in the second longitudinal waves forming a substantial part of energy of ultrasound waves at a desired region in the subject at a therapeutic level.
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Accused Products
Abstract
A method of delivering ultrasound signals using shear waves includes applying a portion of at least a first ultrasound beam to a subject at at least a first incident angle relative to the surface of the subject to induce shear waves in the subject, energy in the shear waves forming a substantial part of energy of first ultrasound waves at a desired region in the subject at a therapeutic level.
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Citations
31 Claims
- 1. A method of delivering ultrasound signals using shear waves, the method comprising applying first longitudinal waves of at least a first ultrasound beam to a subject at at least a first incident angle relative to a first surface of the subject such that the first longitudinal waves are converted to first shear waves in the subject and are converted to second longitudinal waves at a second surface of the subject, energy in the second longitudinal waves forming a substantial part of energy of ultrasound waves at a desired region in the subject at a therapeutic level.
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13. A system for delivering ultrasound signals to a target region in a subject using shear waves, the system comprising:
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a source configured to transmit ultrasound energy; and directing means, coupled to the source, for causing at least first longitudinal waves of the transmitted ultrasound energy to be incident upon a surface of the subject the first longitudinal waves are converted to first shear waves in the subject and are converted to second longitudinal waves at a second surface of the subject, energy in the second longitudinal waves forming a substantial part of energy of ultrasound waves at the target region in the subject at a therapeutic level. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A system for delivering ultrasound signals to a target region in a subject using shear waves, the system comprising:
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a source configured to transmit ultrasound energy; a controller coupled to the source and configured to actuate the source to transmit ultrasound energy toward the subject; and a positioning device coupled to the source and configured to ensure that first longitudinal waves of a first mainbeam from at least a portion of the source is directed at a portion of a first surface of the subject at a first angle between a longitudinal critical angle associated with the subject and a shear critical angle associated with the subject such that the first longitudinal waves are converted to shear waves in the subject and are converted to second longitudinal waves at a second surface of the subject and energy from the second longitudinal waves will reach the target region; wherein the controller is configured to cause the source to transmit energy in a plurality of pulses, with each pulse having a different frequency. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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Specification