在幻影和活体中使用染色焦点转移校准对照对照校正减弱系数成像
Johannes Kübler1,2, Vincent S Zoutenbier1,3, Gijs Buist1,3
1LaserLaB, Department of Physics and Astronomy, Vrije Universiteit, Amsterdam, The Netherlands.
Biomedical optics express
|October 19, 2023
概括
这项研究引入了一种新的方法来校准光学连贯性断层扫描 (OCT) 图像,通过使用染色偏差来提取焦点位置. 这使得用于疾病检测的光学属性测量更加精确.
科学领域:
- 生物医学光学 生物医学光学
- 医疗成像医学成像
- 眼科医生 眼科 眼科
背景情况:
- 光学连贯断层扫描 (OCT) 是结构组织成像的一个关键技术.
- 校准OCT图像强度可以了解像衰减系数这样的光学特性,有助于量化病态变化.
- 精确的校准需要了解相撞光束的焦点位置和雷利长度.
研究的目的:
- 探索利用系统的染色异常从OCT扫描中提取焦点位置的可行性.
- 通过校准强度值来实现高分辨率的OCT衰减系数成像.
- 引入一种方法来实验性地确定OCT系统中的色彩焦点转移.
主要方法:
- 利用OCT系统中的色彩焦点偏移来实现子频谱重建图像的不同焦点位置.
- 使用这些子频谱图像的比率来估计焦点位置.
- 重建高分辨率B扫描并执行衰减系数成像.
主要成果:
- 证明了高分辨率B扫描的成功重建.
- 实现了高分辨率的OCT衰减系数成像.
- 引入并验证了一种用于实验性确定幽灵和人类视网膜色彩焦点移动的方法,并将其与理论计算进行比较.
结论:
- 从OCT扫描中可以使用色差偏差提取焦点位置,从而实现强度校准.
- 开发的方法允许高分辨率的OCT衰减系数成像.
- 染色焦点转移的实验验证为OCT系统的表征提供了一个实用的工具.
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