Focus Control Aided by Numerical Simulation in Heterogeneous Media for High-Intensity Focused Ultrasound Treatment
スポンサーリンク
概要
- 論文の詳細を見る
A focus control method based on time reversal aided by numerical simulation was implemented to correct focal errors in heterogeneous media by using a 56-element phased array transducer at a frequency of 2 MHz. Two types of acrylic phantom were employed to mimic the acoustic heterogeneities in the human body. Focal errors were significantly reduced by applying the phase correction. Moreover, the effects of amplitude correction, array configuration of the transducer, and transverse wave propagation in an elastic body were examined to improve the focal quality. The results suggested that the ultrasound was effectively converged on the target by correcting the amplitude of the ultrasound, and the accuracy of the focus control was enhanced by changing the array configuration and taking into account the shear elasticity of the elastic body in the simulation.
- 2013-07-25
著者
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OKITA Kohei
Department of Internal Medicine and Molecular Science, Graduate School of Medicine, Osaka University
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Sasaki Akira
Department Of Applied Physics Tokyo Institute Of Technology
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Matsumoto Yoichiro
Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Takagi Shu
Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Azuma Takashi
Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Narumi Ryuta
Department of Bioengineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Matsuki Kosuke
Department of Mechanical Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Mitarai Shigeru
Department of Mechanical Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Yoshinaka Kiyoshi
Human Technology Research Institute, Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8561, Japan
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