Acoustic Nonlinear Behaviour of Microbubble Contrast Agent

• 来源期刊: 中国物理快报（英文版）
• 学科: 物理学
• 年，卷（期）: 2002,（12）
• 页码范围: 1828-1830
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

We have investigated the nonlinear characteristics of a microbubble contrast agent Sonazoid R (Nycomed,Norway), including the second, third, 1/2-order, 3/2-order and 5/2-order harmonics. We have measured the 1/2-order subharmonic response to different transmission sound pressures. We have found that subharmonic signals cannot be generated until the acoustic pressure reaches a certain value, which is the most different subharmonic from high harmonics. This result is favourable for the further study of the subharmonic in the bubbly liquid.The 3/2-order ultraharmonic response to acoustic pressure was also measured.