SonoVue的声响和环境压力灵敏度表征用于非侵入性压力估计
Roozbeh H Azami1, Flemming Forsberg2, John R Eisenbrey2
1Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052, USA.
The Journal of the Acoustical Society of America
|April 17, 2024
概括
使用SonoVue微气泡进行亚波辅助压力估计 (SHAPE) 显示了明显的压力依赖反应. 这些发现促进了医疗应用的非侵入性压力监测技术的发展.
科学领域:
- 医疗成像医学成像
- 声学物理 声学物理
背景情况:
- 非侵入性压力测量在医学诊断中至关重要.
- 低音辅助压力估计 (SHAPE) 利用微气泡的行为来测量压力.
- 对于SHAPE应用,研究了SonoVue微气泡,其核心是硫六化物 (SF6).
研究的目的:
- 为了描述SONAVUE微气泡在不同压力条件下对SHAPE的亚声响应.
- 评估使用SonoVue微气泡在非侵入性压力估计中的可行性.
主要方法:
- 在SonoVue微气泡中,在3MHz时,受到25-700kPa的峰值负压 (PNP).
- 进行了8个加压周期,从大气压到25kPa的超压.
- 在不同的激发水平和超压周期中分析了亚波信号响应.
主要成果:
- 在SonoVue微泡中发现了两种类型的亚波反应 (I型和II型).
- 在较低刺激 (25-400 kPa PNP) 时观察到I型亚波信号,并且在过压时呈现线性下降.
- 在多个循环中,在大气压下I型响应下降,而后来的循环显示过压时的振幅增加.
- 在较高刺激 (>400 kPa PNP) 的II型亚波信号随着环境压力的增加而持续下降.
结论:
- 索诺维微气泡表现出独特的压力依赖的亚声特征,适合SHAPE.
- 该研究证明了SonoVue在非侵入性压力监测方面的潜力,在不同的激发水平上有不同的反应.
- 需要进一步的研究来优化使用SonoVue用于临床应用的SHAPE协议.
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