| Presentation | 2020-01-23 Focal point evaluation of focused ultrasonic probe and focus position moving by edge wave Yuusuke Tanaka, Akira Abe, Yukio Ogura, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In the focused ultrasound probe, a phenomenon occurs in which the focal point is closer to the design value. This phenomenon is considered by the overlap of the direct wave and the edge wave, and the focal point varies depending on the degree of influence. The focal point FD of only the direct wave and the focal point FE of only the edge wave were calculated, and it was found that the actual focal point was between FD and FE. When the influence of the direct wave is large, it is close to FD, and when the influence of the edge wave is large, it is close to FE. The influence of the edge wave is considered to change depending on the aperture angle, and the focus obtained from the influence of the direct wave and the edge wave is compared with the focus in the experiment. The frequency was evaluated from the propagation time difference, and the relationship between the wavelength, the response time of the signal, and the resolution was considered. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Ultrasonic / Acoustic lens / Focal point / Edge wave / Direct wave |
| Paper # | US2019-97 |
| Date of Issue | 2020-01-15 (US) |
| Conference Information | |
| Committee | EA / US |
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| Conference Date | 2020/1/22(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Doshisha Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | [Joint Meeting on Acoustics and Ultrasonics Subsociety] Engineering/Electro Acoustics, Ultrasonics, and Related Topics |
| Chair | Kenichi Furuya(Oita Univ.) / Jun Kondo(Shizuoka Univ.) |
| Vice Chair | Suehiro Shimauchi(Kanazawa Inst. of Tech.) / Shigeto Takeoka(Shizuoka Inst. of Science and Tech.) / Shinichi Takeuchi(Toin Univ. of Yokohama) / Hikaru Miura(Nihon Univ.) |
| Secretary | Suehiro Shimauchi(NHK) / Shigeto Takeoka(Univ. of Tokyo) / Shinichi Takeuchi(Kanagawa Univ.) / Hikaru Miura(Doshisha Univ.) |
| Assistant | Keisuke Imoto(Ritsumeikan Univ.) / Daisuke Morikawa(Toyama Pref Univ.) / Mototaka Arakawa(Tohoku Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Engineering Acoustics / Technical Committee on Ultrasonics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Focal point evaluation of focused ultrasonic probe and focus position moving by edge wave |
| Sub Title (in English) | |
| Keyword(1) | Ultrasonic |
| Keyword(2) | Acoustic lens |
| Keyword(3) | Focal point |
| Keyword(4) | Edge wave |
| Keyword(5) | Direct wave |
| 1st Author's Name | Yuusuke Tanaka |
| 1st Author's Affiliation | Japan Probe Co., Ltd.(Japan Probe) |
| 2nd Author's Name | Akira Abe |
| 2nd Author's Affiliation | Japan Probe Co., Ltd.(Japan Probe) |
| 3rd Author's Name | Yukio Ogura |
| 3rd Author's Affiliation | Japan Probe Co., Ltd.(Japan Probe) |
| Date | 2020-01-23 |
| Paper # | US2019-97 |
| Volume (vol) | vol.119 |
| Number (no) | US-374 |
| Page | pp.pp.149-154(US), |
| #Pages | 6 |
| Date of Issue | 2020-01-15 (US) |