光学相干断层成像检验技术-刑事技术.PDF

刑事技术 2015 年 第40 卷 第5 期 ·综  述· DOI: 10.16467/j.1008-3650.2015.05.015 光学相干断层成像检验技术 张 宁，黎智辉，许小京 （公安部物证鉴定中心，北京 100038） Optical Coherence Tomography: Principles and Applications in Forensic Science Institute of Forensic Science, Ministry of Public Security, Beijing , China) ZHANG Ning, LI Zhihui, XU Xiaojing （ 100038 ABATRACT: Optical coherence tomography (OCT), an imaging system very similar to ultrasound by use of light instead of sound, is an emerging technology for non-invasive, high resolution and cross-sectional imaging based on low-coherence interferometry. In the past, OCT has been widely applied in medical imaging, especially in ophthalmology, cardiology, dermatology and gastrointestinal observation. Yet, its ability to provide three-dimensional tomographic images is also rendering it attractive for applications beyond the medical. In practice, the forensic imaging technology plays an important role in searching, extracting and analyzing the evidence with merits of non-invasiveness, high speed and high precision. Thus OCT, competent to explore the internal features of an object with micro-meter resolution, will greatly expand the scope of current evidence examination technology, showing a broadly applicable prospect. In this review, we will introduce the basic concepts, principles, categories of OCT technology and a detailed introduction of the so far presented OCT-based methods and applications, ranging from fingerprint imaging, counterfeit banknote detection, easel painting examination, tattoo inspection, bloodstain volume determination, post-mortem interval and bullet imaging. Owing to the characteristic of non-invasive and cross-sectional