基于微焦点CT与数据约束模型的古代家猪牙齿显微结构研究  

Study on the Microstructure of Ancient Pig Teeth Based on Micro-CT and Data-constrained Modeling

作　　者：张旭芳 王海鹏[2] 李君[3] 马杰[4] 李建莉 杨玉双 侯亮亮[3] 李莉[2] ZHANG Xufang;WANG Haipeng;LI Jun;MA Jie;LI Jianli;YANG Yushuang;HOU Liangliang;LI Li(Institute of Theoretical Physics and Department of Physics,Shanxi University,Taiyuan 030006,China;College of Physics and Electronics Engineering,Shanxi University,Taiyuan 030006,China;College of History and Culture,Shanxi University,Taiyuan 030006,China;State Key Laboratory of Quantum Optics and Quantum Optic Devices,Institute of Laser Spectroscopy,College of Physics and Electronic Engineering,Shanxi University,Taiyuan 030006,China;CSIRO,Private Bag 10,Clayton,Victoria 3169,Australia)

机构地区：[1]山西大学理论物理研究所,太原030006 [2]山西大学物理电子工程学院,太原030006 [3]山西大学历史文化学院,太原030006 [4]山西大学物理电子工程学院,激光光谱研究所,量子光学与光量子器件国家重点实验室,太原030006 [5]澳大利亚联邦科学工业研究组织,克莱顿3169

出　　处：《CT理论与应用研究（中英文）》2020年第6期677-685,共9页Computerized Tomography Theory and Applications

基　　金：国家自然科学基金(21206087)。

摘　　要：本文对一例考古发掘出土的古代家猪下颌骨及牙齿进行了微焦点CT成像,通过加置滤波片有效减弱了线束硬化对CT图像的影响。基于数据约束模型(DCM)对样品三维结构进行了定量计算,获取了包含小于CT图像体元尺寸在内的样品跨尺度结构信息。对样品中孔隙及高吸收组分的联通特性进行了跨尺度计算,得到这两种组分的三维团簇分布。与常见的图像阈值分割法相比,DCM模型有效减弱了部分体积效应对图像分析的影响。本文研究结果为考古样品的内部形态测量、结构分析提供了数据基础,为考古样品的数字建模存档提供一种新的方法。In this paper,the jaw bone and teeth of an ancient pig unearthed from a historic site were imaged using a micro-CT.The three-dimensional(3D)structure of the sample was quantitatively calculated based on data-constrained modeling(DCM).The multi-scale structure of the sample including those smaller than CT imaging resolution size was obtained.The multi-scale connectivity of pore and high X-ray absorption compositions in the sample were calculated respectively.The 3D distribution form of pore and high X-ray absorption compositions clusters was obtained.Compared with common image threshold segmentation method,DCM efficiently reduces the influence of partial volume effect on image analysis.The results of this study provide a data basis for the internal morphological measurement and structural analysis of archaeological samples.The method presented in this paper can be applied to the digital modeling and archiving of archaeological samples.

关 键 词：微焦点CT 数据约束模型 跨尺度结构 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]