脂涂层超声波对比剂微气泡的亚波共振
Hossein Yusefi1, Brandon Helfield2
1Department of Physics, Concordia University, Montreal, Quebec H4B 1R6, Canada.
Ultrasonics sonochemistry
|January 13, 2024
概括
超声波对比微泡的初始脂包装显著影响了它们的次反应. 泡状态的变化 (弹性与曲) 和辐射外流改变了亚波共振频率,这对于诊断成像和向治疗至关重要.
科学领域:
- 声学和生物医学工程
- 材料科学和纳米技术材料科学和纳米技术
背景情况:
- 脂封装的微气泡对于诊断成像和向治疗至关重要.
- 微泡反应受泡大小和封装等内在因素以及边界等外在因素的影响.
- 最初的脂包装是影响微泡振动动力的关键内在因素.
研究的目的:
- 调查初始脂包装如何影响单个和配对微泡的亚反应.
- 在不同的初始脂状态下分析辐射外流对亚波共振的影响.
- 探索泡大小和近距离在两个泡系统的影响.
主要方法:
- 利用有限元模型来模拟微气泡的行为.
- 检查了直径为1.5至2.5微米的微气泡.
- 研究了单个微气泡和两个相邻的微气泡系统.
主要成果:
- 对于弹性微气泡,增加的辐射外流转移了亚响应到较低的频率 (高达10%).
- 对于曲的微气泡,增加的辐射外流将响应转移到更高的频率 (高达8%).
- 两个泡系统显示了不同的频率变化,取决于泡大小,初始状态和接近,观察到的变化高达19%.
结论:
- 最初的脂包装是微泡子亚和反应的关键决定因素.
- 辐射外流和气泡间相互作用显著调节亚波共振频率.
- 这些发现对优化超声波对比剂用于成像和治疗有直接影响.
相关概念视频
01:14Sound Waves: Resonance
2.6K
Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
2.6K
01:17Ultrasonography
4.5K
Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
During an ultrasonography procedure, a handheld device called...
4.5K