| Presentation | 2019-02-22 Detection of a vessel mimicking lymph channel by contrast enhanced active Doppler ultrasonography Saito Katsuya, Yoshida Kenji, Omura Masaaki, Tamura Kazuki, Yamaguchi Tadashi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This report proposed a method for detecting lymph vessels, named contrast enhanced active Doppler ultrasonography(CEADUS), where the translation of ultrasound contrast agents(UCAs) due to the acoustic radiation force was quantified by Doppler method. Previous study showed that the trend in experimental data for the translation is explainable from the theory on bubble dynamics. In the CEADUS, the received echo contains clutter echoes due to surrounding biological tissues in addition to contrast echoes, resulting in possible negative effect e.g. misestimation of velocity. Therefore, we examined experiments using a tissue-mimicking phantom containing acoustic scatterer in which a cylindrical chamber with a 0.91 mm diameter was formed. The chamber was filled with a suspension of Sonazoid as UCAs. To control the ratio of phantom region and the region where UCAs existed in the spatial resolution, the transducer with a point spread function of 200 μm was scanned from the center at the step of 20 μm in the lateral direction, and the ultrasound with the center frequency of 14.4 MHz and pulse length of 0.47 mm was emitted at each scan line. The translational velocity of contrast agents decreased when the distant between the center of chamber and the sound axis of ultrasound beam is more than 0.38 mm. This value was smaller than the real radius of the chamber. In the depth direction, the same trend was confirmed. As a conclusion, the effect of clutter signal results in the underestimation of the translational velocity of UCAs. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Lymph vessel / Acoustic radiation force / Ultrasound contrast agent / Doppler method / Clutter signal |
| Paper # | US2018-114 |
| Date of Issue | 2019-02-15 (US) |
| Conference Information | |
| Committee | US |
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| Conference Date | 2019/2/22(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Shinichi Takeuchi(Toin Univ. of Yokohama) |
| Vice Chair | Minoru Kurosawa(Tokyo Inst. of Tech.) / Jun Kondo(Shizuoka Univ.) |
| Secretary | Minoru Kurosawa(Univ. of Tokyo) / Jun Kondo(Kanagawa Univ.) |
| Assistant | Daisuke Koyama(Doshisha 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) | Detection of a vessel mimicking lymph channel by contrast enhanced active Doppler ultrasonography |
| Sub Title (in English) | |
| Keyword(1) | Lymph vessel |
| Keyword(2) | Acoustic radiation force |
| Keyword(3) | Ultrasound contrast agent |
| Keyword(4) | Doppler method |
| Keyword(5) | Clutter signal |
| 1st Author's Name | Saito Katsuya |
| 1st Author's Affiliation | Chiba University(Chiba Univ.) |
| 2nd Author's Name | Yoshida Kenji |
| 2nd Author's Affiliation | Chiba University(Chiba Univ.) |
| 3rd Author's Name | Omura Masaaki |
| 3rd Author's Affiliation | Chiba University(Chiba Univ.) |
| 4th Author's Name | Tamura Kazuki |
| 4th Author's Affiliation | Chiba University(Chiba Univ.) |
| 5th Author's Name | Yamaguchi Tadashi |
| 5th Author's Affiliation | Chiba University(Chiba Univ.) |
| Date | 2019-02-22 |
| Paper # | US2018-114 |
| Volume (vol) | vol.118 |
| Number (no) | US-452 |
| Page | pp.pp.33-37(US), |
| #Pages | 5 |
| Date of Issue | 2019-02-15 (US) |