脂质涂层微泡的时间依赖的尺寸稳定性和外行为
Saikat Halder1, Mehmet Yapar1, Sanku Mallik2
1Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052, USA.
The Journal of the Acoustical Society of America
|January 28, 2026
概括
这项研究评估了用于超声波成像的脂质涂层微泡的保质期. 微泡的稳定性,大小和度被监测了30天,揭示了对它们作为对比剂的有效性的主要见解.
科学领域:
- 生物医学工程 生物医学工程
- 材料科学 材料科学 材料科学
- 声学 声学 在声学方面
背景情况:
- 微泡是至关重要的超声波对比剂.
- 确保长期保质期和稳定的尺寸分布对于微泡的有效性至关重要.
- 了解微气泡的稳定性,有助于它们在医学成像中的应用.
研究的目的:
- 为了研究定制聚散微气泡悬浮剂的长期稳定性和衰减特性.
- 评估时间对微气泡大小,度和外特征的影响.
- 为超声波应用提供脂质涂层微气泡的保质期数据.
主要方法:
- 微气泡是通过机械动准备的,其中含有 (C4F10) 气核和脂质混合物 (DPPC:DPPE-PEG2000).
- 尺寸分布和衰减在30天的定期间隔内进行测量.
- 使用对衰减数据应用的指数弹性模型 (EEM) 确定了外特性.
主要成果:
- 微泡的大小保持稳定 (∼2.25微米) 13天,然后略微增加到∼2.5微米.
- 微泡度在30天内从7.14 × 10^9 MB/mL下降到3.29 × 10^9 MB/mL,从而减少衰减.
- 的弹性和粘度在13天内保持不变,然后分别增加了50%和200%.
结论:
- 这项研究提供了关于脂质涂层微泡的体外保质期和稳定性的宝贵数据.
- 研究结果表明,这些微气泡的临界稳定期约为13天.
- 结果为微气泡作为超声波对比剂的最佳使用和储存条件提供了信息.
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