| Presentation | 2022-08-22 Evaluation of frequency dispersion of viscoelastic tissue by mechanical burst excitation shear wave elastography Shinnosuke Hirata, Shinichiro Saito, Kaname Kurokawa, Mikio Suga, Kenji Yoshida, Tadashi Yamaguchi, Hiroyuki Hachiya, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In ultrasound shear wave elastography (SWE), the shear modulus of the liver, associated to the progression of liver fibrosis, can be non-invasively estimated by measuring the propagation speed of the shear wave propagating in the liver. However, it is assumed that the shear wave speed, the shear modulus, and liver fibrosis may not correspond by the frequency dispersibility of the shear wave speed due to the viscosity of the liver and the refraction or diffraction of the shear wave due to the heterogeneity of the liver. In this study, we have proposed the mechanical burst excitation (MBE) SWE that mechanically vibrates the body surface by burst-wave excitation of arbitrary frequencies. The frequency dispersion can be evaluated, and the shear wave propagation can be visualized in MBESWE. In this paper, we describe the method of signal processing for ultrasonic echoes and the method of visualization of the shear wave propagation in MBESWE. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Ultrasound image / Liver fibrosis / Shear wave / Viscoelasticity |
| Paper # | US2022-35 |
| Date of Issue | 2022-08-15 (US) |
| Conference Information | |
| Committee | US |
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| Conference Date | 2022/8/22(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tokyo Tech (Ookayama Campus) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Underwater acoustics, Ultrasonics, etc. |
| Chair | Kentaro Nakamura(Tokyo Inst. of Tech.) |
| Vice Chair | Yoshikazu Koike(Shibaura Inst. of Tech.) / Yasuaki Watanabe(Tokyo Metropolitan Univ.) |
| Secretary | Yoshikazu Koike(Tohoku Univ.) / Yasuaki Watanabe(Chiba Univ.) |
| Assistant | Kan Okubo(Tokyo Metropolitan Univ.) |
| Paper Information | |
| Registration To | 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) | Evaluation of frequency dispersion of viscoelastic tissue by mechanical burst excitation shear wave elastography |
| Sub Title (in English) | |
| Keyword(1) | Ultrasound image |
| Keyword(2) | Liver fibrosis |
| Keyword(3) | Shear wave |
| Keyword(4) | Viscoelasticity |
| 1st Author's Name | Shinnosuke Hirata |
| 1st Author's Affiliation | Chiba University(Chiba Univ.) |
| 2nd Author's Name | Shinichiro Saito |
| 2nd Author's Affiliation | Chiba University(Chiba Univ.) |
| 3rd Author's Name | Kaname Kurokawa |
| 3rd Author's Affiliation | Chiba University(Chiba Univ.) |
| 4th Author's Name | Mikio Suga |
| 4th Author's Affiliation | Chiba University(Chiba Univ.) |
| 5th Author's Name | Kenji Yoshida |
| 5th Author's Affiliation | Chiba University(Chiba Univ.) |
| 6th Author's Name | Tadashi Yamaguchi |
| 6th Author's Affiliation | Chiba University(Chiba Univ.) |
| 7th Author's Name | Hiroyuki Hachiya |
| 7th Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| Date | 2022-08-22 |
| Paper # | US2022-35 |
| Volume (vol) | vol.122 |
| Number (no) | US-154 |
| Page | pp.pp.34-38(US), |
| #Pages | 5 |
| Date of Issue | 2022-08-15 (US) |