| Presentation | 2007-08-10 Ultrasonic measurement of displacement distribution inside object cyclically compressed by acoustic radiation forces Yoshitaka ODAGIRI, Hideyuki HASEGAWA, Hiroshi KANAI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A possible way for the quantitative evaluation of the acupuncture therapy is the measurement of the change in the elastic property of muscle due to application of the acupuncture therapy. Many studies have been conducted to measure mechanical properties of tissues by applying an ultrasound-induced acoustic radiation force. To assess mechanical properties, strain of an object must be generated. However, one radiation force is not effective because it also generates translational motion when the object is much harder than surrounding medium. In this study, two cyclic radiation forces are applied to a muscle phantom from two opposite horizontal directions so that the object is cyclically compressed in the horizontal direction. By the horizontal compression, the object is vertically expanded due to its incompressibility. The resultant vertical displacement is measured using ultrasound. Two ultrasonic transducers for actuation were both driven by sums of two continuous sinusoidal signals at two slightly different frequencies (1MHz and (1M+5) Hz). In this paper, two cyclic acoustic radiation forces were applied to the object to generate strain inside it and the displacement inside the object was measured by ultrasound. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | ultrasound / acoustic radiation force / strain / phased tracking method / acupuncture therapy |
| Paper # | EA2007-53 |
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| Committee | EA |
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| Conference Date | 2007/8/3(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Ultrasonic measurement of displacement distribution inside object cyclically compressed by acoustic radiation forces |
| Sub Title (in English) | |
| Keyword(1) | ultrasound |
| Keyword(2) | acoustic radiation force |
| Keyword(3) | strain |
| Keyword(4) | phased tracking method |
| Keyword(5) | acupuncture therapy |
| 1st Author's Name | Yoshitaka ODAGIRI |
| 1st Author's Affiliation | Graduate School of Engineering, Tohoku University() |
| 2nd Author's Name | Hideyuki HASEGAWA |
| 2nd Author's Affiliation | Graduate School of Engineering, Tohoku University |
| 3rd Author's Name | Hiroshi KANAI |
| 3rd Author's Affiliation | Graduate School of Engineering, Tohoku University |
| Date | 2007-08-10 |
| Paper # | EA2007-53 |
| Volume (vol) | vol.107 |
| Number (no) | 187 |
| Page | pp.pp.- |
| #Pages | 4 |
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