模仿血液的染料幻影用于评估光声氧度的精度
Yong Zhou1, Zixin Wang2, Keith A Wear1
1Center for Devices and Radiological Health, US Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, MD 20993, USA.
Photoacoustics
|February 2, 2026
概括
研究人员开发了新的模仿血液的染料解决方案,用于光声成像 (PAI) 氧度测试. 这些染料提供了一种更简单,更安全,更具成本效益的替代品,用于评估PAI设备的准确性,而不是传统的基于血液的幻影.
科学领域:
- 生物医学光学 生物医学光学
- 医疗成像医学成像
- 光声学成像 (PAI) 的使用
背景情况:
- PAI的临床应用需要精确的血液氧和度 (sO2) 测量.
- 目前的PAI氧度评估方法使用复杂,昂贵和潜在的危险的血流幻象.
- 需要更简单,更安全,更稳定的基于幻象的测试方法来测试PAI氧度.
研究的目的:
- 为PAI氧度测试开发稳定和可调节的血模仿染料解决方案.
- 为了评估这些染料溶液的性能,作为血液幻影的非生物替代品.
- 评估这种新方法的潜力,以促进PAI设备的临床采用.
主要方法:
- 近红外有机染料 (NIR746A和IRA980) 的二进制混合物被配制成模仿各种sO2水平 (40-100%).
- 染料溶液和牛血使用光谱光度和光声学 (PA) 光谱法在750nm和850nm进行了表征.
- 模仿乳房的水凝幻象,嵌入了含有染料溶液或血液的管子,使用定制的PAI系统进行成像.
主要成果:
- 染料溶液在幻影测试中表现出与牛血相比的性能指标.
- 光声学sO2的根平均平方差 (RMSD) 值为血液的6-17%和染料的4-18%.
- 灵敏度为0.4-0.7的血液和0.4-0.9的染料;深度平均偏差为4-17%的血液和3-10%的染料.
结论:
- 模仿血液的染料为PAI氧度评估提供了更简单,更便宜,更安全,更稳定的方法.
- 这种方法可以导致更简单,更可重复的基于幻 PAI 测试方法.
- 开发的染料溶液可能会加速PAI技术的临床采用.
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