arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1708.04037physics.optics
收藏

色散映射作为傅立叶域光学相干层析成像数据的简单后处理步骤

Dispersion mapping as a simple postprocessing step for Fourier domain Optical Coherence Tomography data

Sylwia M. Kolenderska, Bastian Braeuer, Frederique Vanholsbeeck

摘要:

光学相干断层扫描(OCT)最初被认为是一种体积成像方法。很快,OCT图像超越了结构数据,并开始提供有关对象的功能信息,例如血流或组织弹性的可视化。最小或不需要系统改变使得功能性OCT技术在执行多模态成像中是有用的,其中在单次检查中产生不同对比度的图像。我们提出了一种方法,进一步扩展了当前的OCT功能,不需要修改系统。我们的算法提供了有关样品的群速度色散(GVD)的信息,可以很容易地应用到任何OCT数据集与傅立叶域系统。GVD是根据从不同光谱范围获得的两个图像测量的材料光学厚度的差异计算的。而不是使用两个单独的光源,我们建议应用一个基于滤波器的数值程序,合成两个光谱从一个宽带光谱。我们讨论了该方法的局限性和目前的GVD值BK 7和蓝宝石和眼介质:角膜和房水的大鼠眼睛。结果证实了以前的测量使用两种不同的光源。

英文摘要:

Optical Coherence Tomography (OCT) was originally conceived as a volumetric imaging method. Quickly, OCT images went beyond structural data and started to provide functional information about an object enabling for example visualization of blood flow or tissue elasticity. Minimal or no need for system alterations make functional OCT techniques useful in performing multimodal imaging, where differently contrasted images are produced in a single examination. We propose a method that further extends the current capabilities of OCT and requires no modifications to the system. Our algorithm provides information about the sample's Group Velocity Dispersion (GVD) and can be easily applied to any OCT dataset acquired with a Fourier domain system. GVD is calculated from the difference in material's optical thickness measured from two images obtained for different spectral ranges. Instead of using two separate light sources, we propose to apply a filter-based, numerical procedure that synthesizes two spectra from one broadband spectrum. We discuss the limitations of the method and present GVD values for BK7 and sapphire and ocular media: cornea and aqueous humour of a rat eye. Results corroborate previous measurements using two different light sources.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑