多窗口方法可使OCT轴分辨率提高两倍,具有强大的侧叶抑制和改进的相位灵敏度
Clayton B Walker1,2, Anna Wisniowiecki1,2, Jack C Tang1
1Caruso Department of Otolaryngology-Head and Neck Surgery, University of Southern California, Los Angeles, CA 90033, USA.
Biomedical optics express
|February 29, 2024
概括
这项研究增强了采用泰勒窗口的光学连贯性断层扫描 (OCT) 处理,提高了轴分辨率和相位灵敏度,同时降低了先进的OCT应用的侧叶强度.
科学领域:
- 光学工程是指光学工程.
- 生物医学光学 生物医学光学
- 信号处理 信号处理
背景情况:
- 标准的光学连贯性断层扫描 (OCT) 处理涉及在里埃转换之前使用窗口函数进行光谱成型.
- 现有的多窗口方法可以提高分辨率并抑制侧叶,但可能无法充分利用干扰度相位信息.
研究的目的:
- 扩大用于OCT光谱成型的多窗口方法,以纳入干扰度相位.
- 调查泰勒窗在OCT对轴分辨率,侧叶强度和相位灵敏度的影响.
主要方法:
- 在OCT处理中使用了11个泰勒窗口进行光谱成型.
- 与传统的汉纳窗户进行性能比较.
- 评估了轴分辨率,侧叶抑制和相位灵敏度的改善.
主要成果:
- 与汉恩窗口相比,轴分辨率提高了50%.
- 侧叶强度降低到-31dB.
- 在振动测量和多普勒OCT等应用中显示了20%的相位灵敏度提升.
- 保持低的计算成本.
结论:
- 扩展的多窗口方法,特别是使用泰勒窗口,为OCT提供了显著的优势.
- 这种方法提高了分辨率和相位灵敏度,同时有效地抑制侧叶,使其适合于高级相位灵敏的OCT技术.
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