刑事技术Issue(5)：409-416,8.DOI:10.16467/j.1008-3650.2015.05.015
光学相干断层成像检验技术
Optical Coherence Tomography：Principles andApplications in Forensic Science
摘要
Abstract
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 imaging, OCT is able to detect artificial fingerprint, counterfeit banknote, forgery painting and tattoo. Besides, capable of 3D high resolution imaging, OCT can provide promising applications in high quality imaging and quantitative analyzing, including multi-layer tomography extraction, determination of the volume of bloodstain in the crime scene, image obtainment of the human hair with ultrahigh resolution, estimation of the post-mortem interval and non-contact examination of bullets. Furthermore, OCT techniques have many other advantages as an advanced imaging method with high potential for future forensic applications, for example, the use of near infrared light enabling the non-invasive and non-contact imaging of sample to keep the integrality and authenticity of evidence. Meanwhile, the ability to realize 3D high-resolution cross-sectional imaging will reveal more precise information for sample to authenticate and identify. Moreover, OCT, via extracting different properties such as the spectrum, elasticity and polarization, can achieve diversified functional imaging to further improve the image contrast in demonstrating its appropriateness for forensic imaging.关键词
法庭科学/刑事影像技术/光学相干断层成像Key words
forensic science/forensic imaging/optical coherence tomography分类
社会科学引用本文复制引用
张宁,黎智辉,许小京..光学相干断层成像检验技术[J].刑事技术,2015,(5):409-416,8.基金项目
中央级公益性科研院所基本科研业务费项目 （）
