| Presentation | 2003/6/21 Medical Ultrasonic Transducer using Composite Materials for Acoustic Matching Layers : Computer Simulations of Transducer Arrays Toshio KONDO, Hiroyuki FUJIMOTO, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Increasing the sensitivity of transducer arrays in a medical diagnostic system and decreasing mechanical-coupling between the adjacent elements are intrinsic problems. The use of quarter-wave matching layers as impedance transformation has been a standard practice for attaining high conversion efficiency of transducer arrays. The transducer arrays under consideration were conventional ones with two matching layers on piezoelectric elements. The simulations of the transducer arrays indicated that Poisson's ratio of the matching layers gives a great affect on the sensitivity and the mechanical-coupling between the adjacent elements. That is, the characteristics of the arrays are improved, as the Poisson's ratio is smaller. Carbon-epoxy unidirectional composite mixed with tungsten powder and high strength polyethylene fiber-polyurethane rubber allows the realization of the materials with a Poisson's ratio below 0.1, where the materials have an optimum acoustic impedance for the matching layers. From these facts we found that the improvement of the transducer arrays can be expected by adopting the composite materials to the matching layers. Satisfactory results have been obtained in computer simulations of the transducer array model based on the characteristic data of newly proposed composite materials. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Medical Transducer / Composite Material / Acoustic Matching Layer |
| Paper # | US2003-19 |
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| Committee | US |
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| Conference Date | 2003/6/21(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Ultrasonics (US) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Medical Ultrasonic Transducer using Composite Materials for Acoustic Matching Layers : Computer Simulations of Transducer Arrays |
| Sub Title (in English) | |
| Keyword(1) | Medical Transducer |
| Keyword(2) | Composite Material |
| Keyword(3) | Acoustic Matching Layer |
| 1st Author's Name | Toshio KONDO |
| 1st Author's Affiliation | Faculty of Engineering, Tokushima Bunri University() |
| 2nd Author's Name | Hiroyuki FUJIMOTO |
| 2nd Author's Affiliation | Faculty of Engineering, Tokushima Bunri University |
| Date | 2003/6/21 |
| Paper # | US2003-19 |
| Volume (vol) | vol.103 |
| Number (no) | 158 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |