优化数值k采样用于扫描源光学连贯性断层扫描血管造影
Optics letters
|March 1, 2024
概括
本研究介绍了扫描源光学连贯性断层扫描 (SS-OCT) 和光学连贯性断层扫描血管学 (OCTA) 的数值k采样方法. 这种方法可以提高成像质量,并通过消除硬件时钟要求来降低系统成本.
科学领域:
- 眼科医生 眼科 眼科
- 生物医学光学 生物医学光学
- 医疗成像医学成像
背景情况:
- 高质量的扫描源光学连贯性断层扫描 (SS-OCT) 和光学连贯性断层扫描血管扫描 (OCTA) 取决于精确的k采样.
- 目前SS-OCT系统中的硬件驱动的k采样方法存在与成本,对齐,成像深度和时钟稳定性相关的挑战.
研究的目的:
- 引入和验证一种优化的数值k采样方法,作为硬件k时钟系统的成本效益高的替代方案.
- 在SS-OCT和OCTA中展示数值k-sampling用于高分辨率和深层组织成像的能力.
主要方法:
- 开发并实施了一个优化的数值k采样算法来处理SS-OCT数据.
- 评估了使用数值方法实现的轴分辨率,信号滚动和成像深度.
- 将该方法应用于斑点和较深的眼组织的结构性OCT和OCTA成像.
主要成果:
- 在4毫米的成像深度上,实现了高轴分辨率 (4.9μm FWHM在空气中) 和低信号滚动 (2.3dB损失).
- 展示了可视化微细解剖和微血管结构的能力,包括晶片板.
- 证实了数值方法对结构性OCT和OCTA的有效性.
结论:
- 优化的数值k采样方法为高质量的SS-OCT和OCTA提供了可行的,无硬件的解决方案.
- 这种技术可方便对眼部结构进行详细的成像,有利于诊断视网膜病变和视神经病变.
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