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将光学散射特性映射到单重和多重散射样本中的物理粒子信息中
Taylor M Cannon1,2, Brett E Bouma1,2, Néstor Uribe-Patarroyo2
1Massachusetts Institute of Technology, Institute of Medical Engineering and Science, 70 Massachusetts Avenue, Cambridge, MA 02141, USA.
Biomedical optics express
|October 6, 2023
概括
光学连贯断层扫描 (OCT) 可以通过分析光散射来揭示组织微观结构. 这项研究校准了OCT系统,以准确测量散射特性,改善组织和瘤的诊断能力.
科学领域:
- 生物医学光学 生物医学光学
- 光学连贯性断层扫描技术
- 组织微结构分析 组织微结构分析
背景情况:
- 光学连贯断层扫描 (OCT) 使用光散射在生物组织内源性对比.
- 组织的光学特性,反射微观结构细节,决定光散射行为.
- 从OCT强度数据中测量这些特性可以增强诊断应用.
研究的目的:
- 开发和验证一个校准的OCT系统,用于准确测量组织光学特性.
- 为了分离颗粒大小和度对OCT信号衰减的影响.
- 在生物样本中区分单次和多次散射.
主要方法:
- 试验性校准OCT系统几何 (NA,焦平面).
- 测量深度解析的衰减系数和层级解析的反向散射系数.
- 对模仿组织的幽灵和小鼠大脑组织样本的分析.
主要成果:
- 海洋和海上国家/地区系统的几何结构对单个散射样本的衰减系数的影响很小,但对高度散射样本的影响很大.
- 精确检索散射粒子直径和度被证明在幻影中.
- 通过增加散射粒子密度,在小鼠大脑组织中确定了带有瘤的区域.
结论:
- 校准的OCT系统通过精确测量散射特性,提供了对组织微观结构的增强分析.
- 分离颗粒大小和度可以改善OCT的诊断信息.
- 通过系统拓调整来区分多重散射,为评估测量准确性提供了一个框架.
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