Full-field high-speed optical coherence tomography system for evaluating multilayer and random tissues
Full-field high-speed optical coherence tomography system for evaluating multilayer and random tissues
复制标题
用于评估多层和随机组织的全视场高速光学相干断层扫描系统
DOI：
10.1117/12.726315
复制
发表时间：
2007
影响因子：
6.7
通讯作者：
E. Vorobeva
中科院分区：
文献类型：
--
作者：
I. Gurov;A. Karpets;N. Margariants;E. Vorobeva
对艺术主体状况的检测在文物保护中具有重要的作用。光学相干层析成像（OCT）是一种很有前途的对绘画清漆层等材料样品进行无损截面分析的工具。利用高速OCT系统对大面积物体的地下结构进行检测具有重要意义。本文从信息容量的角度对不同的OCT系统进行了比较，以选择最适合三维多层和随机组织评估的OCT系统变体。提出了对OCT信号进行次奈奎斯特采样的方法，可将采样速度降低几次。为了在处理随机变参数OCT信号时提供高抗噪性和稳定性，本文采用卡尔曼滤波方法对亚奈奎斯特采样OCT信号进行了评估。对评定油漆清漆层等材料的实验结果进行了介绍和讨论。
Testing the condition of art subjects plays important role in reservation of Cultural Heritage. Optical Coherence Tomography (OCT) is a promising tool for nondestructive cross-sectional evaluating internal structure of material samples like varnish layer of paintings. It is important to use high-speed OCT systems for testing subsurface structure of objects with large area. In the paper, comparison of OCT systems from viewpoint of information capacity is given to select the most appropriate OCT system variant for evaluating 3D multilayer and random tissues. The method of sub- Nyquist sampling of OCT signals is considered that is used to decrease sampling speed in a few times. To provide high noise-immunity and stability when processing OCT signals with randomly variable parameters, the Kalman filtering method has been applied for evaluating sub-Nyquist sampled OCT signals. Experimental results of evaluating materials like varnish layer of paintings are presented and discussed.