Shockwave generator using a piezoelectric element
First Claim
1. A shockwave generator adapted to be coupled to an object through a liquid medium for ultrasound transmission to generate a shockwave in the object, comprising:
- a piezoelectric element having an ultrasound radiating surface;
an acoustic matching layer provided on the ultrasound radiating surface of the piezoelectric element; and
a fluorine resin layer provided on the acoustic matching layer in a manner to make contact with the liquid medium;
wherein said acoustic matching layer is formed using a material having an acoustic impedance which is intermediate between the acoustic impedance of the piezoelectric element and that of the fluorine layer.
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Abstract
A shockwave generator is adapted to be coupled to an object through a liquid medium for ultrasound transmission to generate a shockwave in the object. The shockwave generator comprises a piezoelectric element having an ultrasound radiating surface, an acoustic matching layer formed on the ultrasound radiating surface of the piezoelectric element, a fluorine-resin coating layer formed on the acoustic matching layer and a bag provided in front of the ultrasound radiating surface of the piezoelectric element and holding water for ultrasound transmission, where the water is held in contact with the fluorine-resin coating layer.
127 Citations
11 Claims
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1. A shockwave generator adapted to be coupled to an object through a liquid medium for ultrasound transmission to generate a shockwave in the object, comprising:
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a piezoelectric element having an ultrasound radiating surface; an acoustic matching layer provided on the ultrasound radiating surface of the piezoelectric element; and a fluorine resin layer provided on the acoustic matching layer in a manner to make contact with the liquid medium; wherein said acoustic matching layer is formed using a material having an acoustic impedance which is intermediate between the acoustic impedance of the piezoelectric element and that of the fluorine layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A shockwave generator adapted to be coupled to an object through a liquid medium for ultrasound transmission to generate a shockwave in the object, comprising:
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a piezoelectric element having an ultrasound radiating surface; a fluorine resin layer located on the ultrasound radiating surface in a manner to make contact with the liquid medium; an acoustic lens provided in front of the fluorine resin layer; and an acoustic matching layer present between the piezoelectric element and the fluorine resin layer. - View Dependent Claims (11)
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Specification