Ablation device with spiral array ultrasound transducer
First Claim
1. A cylindrical ultrasound transducer comprising:
- a cylindrical inner electrode;
a cylindrical piezoelectric material disposed over the inner electrode; and
a cylindrical outer electrode disposed over the cylindrical piezoelectric material, the cylindrical outer electrode having spiral grooves separating the outer electrode into a plurality of discrete helical elements.
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Accused Products
Abstract
The present invention relates to a device assembly and tissue ablation transducer having a plurality of helical elements that can be operated out of phase to orient the acoustical energy beam forward or backward in the longitudinal direction. The transducers includes a cylindrical inner electrode, a cylindrical piezoelectric material disposed over the inner electrode, and a cylindrical outer electrode disposed over the cylindrical piezoelectric material. Spiral grooves are cut through at least the outer electrode separating the transducer into a plurality of functionally discrete helical transducer segments. The helical transducer segments can be operated independent from one another. An array of intertwined helical transducers arranged linearly along a helical axis are also contemplated.
173 Citations
17 Claims
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1. A cylindrical ultrasound transducer comprising:
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a cylindrical inner electrode; a cylindrical piezoelectric material disposed over the inner electrode; and a cylindrical outer electrode disposed over the cylindrical piezoelectric material, the cylindrical outer electrode having spiral grooves separating the outer electrode into a plurality of discrete helical elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A cylindrical ultrasound transducer comprising:
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a cylindrical inner electrode; a cylindrical piezoelectric material disposed over the inner electrode; a cylindrical outer electrode disposed over the cylindrical piezoelectric material; and spiral grooves cut through the outer electrode and at least a portion of the cylindrical piezoelectric material, the spiral grooves separating the transducer into a plurality of functionally discrete helical transducer segments.
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Specification