| Presentation | 2000/10/4 Chaos Analysis of the Ultrasonic Echo Signals : Study of a Tissue Phantom Teruyuki Sonoyama, Akimitsu Harada, Takashi Ito, Yoshihiro Yoshikawa, Chihiro Kasai, Yoshifumi Harada, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We consider that echo signals of an ultrasonic diagnostic system are nonlinear responses caused by overlapping of reflective, refractive, and scattering ultrasonic waves. The goal of our study is to develop novel diagnostic indices by analyzing the echo signals using chaos theory. In this preliminary study, we have verified the chaos characteristics of the echo signals from a stationary tissue phantom. We calculated the correlation dimension and Lyapunov exponent of attractors which were embedded in the reconstructed phase space. We found that attractors exhibited quasi-periodic behavior and that their largest Lyapunov exponent were positive. Thus, these results confirmed that echo signals from a tissue phantom possess chaos characteristics. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | chaos analysis / RF echo signals / attractor / correlation dimension / Lyapunov exponent |
| Paper # | US2000-61 |
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| Committee | US |
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| Conference Date | 2000/10/4(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) | Chaos Analysis of the Ultrasonic Echo Signals : Study of a Tissue Phantom |
| Sub Title (in English) | |
| Keyword(1) | chaos analysis |
| Keyword(2) | RF echo signals |
| Keyword(3) | attractor |
| Keyword(4) | correlation dimension |
| Keyword(5) | Lyapunov exponent |
| 1st Author's Name | Teruyuki Sonoyama |
| 1st Author's Affiliation | ALOKA Co.Ltd.() |
| 2nd Author's Name | Akimitsu Harada |
| 2nd Author's Affiliation | ALOKA Co.Ltd. |
| 3rd Author's Name | Takashi Ito |
| 3rd Author's Affiliation | ALOKA Co.Ltd. |
| 4th Author's Name | Yoshihiro Yoshikawa |
| 4th Author's Affiliation | ALOKA Co.Ltd. |
| 5th Author's Name | Chihiro Kasai |
| 5th Author's Affiliation | ALOKA Co.Ltd. |
| 6th Author's Name | Yoshifumi Harada |
| 6th Author's Affiliation | Faculty of Engineering, Fukui University |
| Date | 2000/10/4 |
| Paper # | US2000-61 |
| Volume (vol) | vol.100 |
| Number (no) | 333 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |