| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Effect of Tissue Inhomogeneity on Nonlinear Propagation of Focused Ultrasound |
LIU Zhen-Bo1,2, FAN Ting-Bo1, GUO Xia-Sheng1, ZHANG Dong1 |
| 1Institute of Acoustics, Key Laboratory of Modern Acoustics (Ministry of Education), Nanjing University, Nanjing 210093 2Nanjing Normal University, Nanjing 210097 |
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| Cite this article: |
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LIU Zhen-Bo, FAN Ting-Bo, GUO Xia-Sheng et al 2010 Chin. Phys. Lett. 27 094303 |
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Abstract We study the influence of tissue inhomogeneity on the focused ultrasound based on the phase screen model and the acoustic nonlinear equation. The inhomogeneous tissue is considered as a combination of a homogeneous medium and a phase aberration screen. Six polyethylene (PE) plates with various correlation lengths and standard deviations are made to mimic the inhomogeneity induced by the human body abdominal. Results indicate that the correlation length affects the side lobe structure of the beam pattern; while the standard deviation is associated with the focusing capability. This study provides a theoretical and experimental basis for the development of a precise treatment plan for high intensity focused ultrasound.
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43.25.+y
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Received: 10 May 2010
Published: 25 August 2010
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