《生命科学》 2013, 25(8): 779-786

显微CT技术在古生代鱼类研究中的应用

盖志琨^*，朱　敏

(中国科学院古脊椎动物与古人类研究所，中国科学院脊椎动物演化与人类起源重点实验室，北京 100044)

摘　要：摘　要：高分辨率计算机断层扫描( 显微CT， micro-CT) 已逐渐成为古生物学研究的重要支撑手段。研究者可以在不破坏珍贵化石样品的情况下，取得微米级或亚微米级的高分辨率三维断层图像。根据X 光源不同，高分辨率CT 可以分为工业用显微CT 和同步辐射显微CT，两者相互补充，满足了对多数化石材料的无损探测要求。目前，显微CT 技术在古生代鱼类的脑颅三维重建和骨组织学显微成像上已经有了比较成熟的应用，从而为脊椎动物早期演化史上的若干重大问题( 如颌的起源、牙齿的发育和脑的演化等) 取得突破性进展提供了关键的技术支撑。

Application of micro-CT in the research on Paleozoic fis

GAI Zhi-Kun^*， ZHU Min

( Key Laboratory of Vertebrate Evolution and Human Origins， Institute of Vertebrate Paleontology and Paleoanthropology， Chinese Academy of Sciences， Beijing 100044， China)

Abstract: Abstract: The high-resolution computed tomography (CT) has become a powerful tool in paleontology， providing three-dimensional (3D) tomographic images at micron or sub-micron resolution without damaging fossil samples. According to the X-ray sources， the high-resolution CT includes the industrial X-ray microtomography and synchrotron X-ray microtomography. The two micro-CTs complement each other to meet nondestructive investigations of fossil materials with a broad size range. Currently， the micro-CT technique has been successfully applied to the research on Paleozoic fishes， e.g. 3D reconstruction of fish braincase and imaging of microstructure of bone tissue. Thanks to the development of industrial and syncrontron micro-CT， breakthroughs have been achieved in understanding early vertebrate evolution， such as the origin of the jaw， tooth development and brain evolution.