| Presentation | 2005-01-21 Consideration for the relationship between subharmonic generation and variation of bubble's radius Norihide MAIKUSA, Aritake YAGI, Tadanori FUKAMI, Hirotaka YANAGIDA, Takao AKATSUKA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Harmonic imaging is the prospective technique to obtain high quality US images using harmonics in echoes from microbubbles, i.e., the collapse of microbubbles and subsequent harmonic emission are contributed to some imaging like flash echo imaging and power Doppler. The subharmonics generation mechanism is not clear enough, however it is considered that it has some relations with the resonance phenomena and the collapse of microbubble. On the other hand, subharmonics in echoes from microbubbles are expected to realize higher echo contrast between tissue and blood flow than that from conventional harmonic imaging because subharmonics can be hardly detected from tissue. We observed echo signals and images of microbubbles through a microscope simultaneously and inspected the relationship between time-variation of each harmonics component and bubble behavior. We discussed relationship between time change of subharmonic power and the distribution of the micorbubble radii using RPNNP (Rayleigh-Plesset-Noltingk-Neppriras-Poritsky) model. In the results, we confirmed there are the similarity between theoretical and experimental data. Moreover, subharmonic has an inverse relation to fundamental wave and second harmonic in time variation. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | subharmonics / microbubble / bubble collapse / ultrasound imaging |
| Paper # | MI2004-62 |
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| Conference Information | |
| Committee | MI |
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| Conference Date | 2005/1/14(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Medical Imaging (MI) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Consideration for the relationship between subharmonic generation and variation of bubble's radius |
| Sub Title (in English) | |
| Keyword(1) | subharmonics |
| Keyword(2) | microbubble |
| Keyword(3) | bubble collapse |
| Keyword(4) | ultrasound imaging |
| 1st Author's Name | Norihide MAIKUSA |
| 1st Author's Affiliation | Graduate School of Science and Engineering, Yamagata University() |
| 2nd Author's Name | Aritake YAGI |
| 2nd Author's Affiliation | Graduate School of Science and Engineering, Yamagata University |
| 3rd Author's Name | Tadanori FUKAMI |
| 3rd Author's Affiliation | Department of Bio-System Engineering, Faculty of Engineering, Yamagata University |
| 4th Author's Name | Hirotaka YANAGIDA |
| 4th Author's Affiliation | Department of Informatics, Faculty of Engineering, Yamagata University |
| 5th Author's Name | Takao AKATSUKA |
| 5th Author's Affiliation | Department of Bio-System Engineering, Faculty of Engineering, Yamagata University |
| Date | 2005-01-21 |
| Paper # | MI2004-62 |
| Volume (vol) | vol.104 |
| Number (no) | 579 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |