中国物理B ›› 2010, Vol. 19 ›› Issue (5): 54302-054302.doi: 10.1088/1674-1056/19/5/054302
黄蓓, 张艳丽, 章东, 龚秀芬
Huang Bei(黄蓓), Zhang Yan-Li(张艳丽), Zhang Dong(章东)†, and Gong Xiu-Fen(龚秀芬)
摘要: This article proposes a finite element model (FEM) for predicting the acoustic scattering from an encapsulated microbubble near rigid boundary. The validity of the model is first examined by comparing the acoustic nonlinear response of a free microbubble with that obtained by the Church model. Then this model is used to investigate the effect of the rigid boundary on acoustic scattering signals from microbubble. The results indicate that the resonance frequency decreases while the oscillation amplitude increases as the microbubble approaches the rigid boundary. In addition, the fundamental component of the acoustic scattering signal is enhanced compared with that of the free microbubble.
中图分类号: (Ultrasonography)