CAJ | 학술논문

介绍了一套适用于小动物成像的高分辨微型CT成像系统.该系统采用用焦点为100μm的微焦点射线源和成像面积为13cm × 13 cm的平板探测器测量数据,以旋转扫描的锥束算法进行图像重建.经测试,平板探测器的MTF在调制度10%时,可达到31Ip/cm;CT系统放大倍率为1.94时,分辨率可达185μm.用兔股骨为样品,可清晰观察到骨小梁结构,表明该系统可高分辨地实现小动物样本的三维结构成像.
개소료일투괄용우소동물성상적고분변미형CT성상계통.해계통채용용초점위100μm적미초점사선원화성상면적위13cm × 13 cm적평판탐측기측량수거,이선전소묘적추속산법진행도상중건.경측시,평판탐측기적MTF재조제도10%시,가체도31Ip/cm;CT계통방대배솔위1.94시,분변솔가체185μm.용토고골위양품,가청석관찰도골소량결구,표명해계통가고분변지실현소동물양본적삼유결구성상.
A high resolution Micro-CT system for small animal imaging is introduced in this paper.Micro-focus X-ray tube with focal diameter of 100 μ m and fiat panel detector with imaging area of 13cm × 13cm are adopted in this system.The data acquired in rotation scanning is reconstructed with cone beam algorithmThe resolving power of the detector is measured to be 31 Ip/cm at 10% of the MTF.The resolution of the Micro-CT system could achieve 185 μ m when the magnification factor is 1.94.Thighbone of a rabbit is used as sample imaging with the system.The trabecular bone could be imaged clearly.And the ability of small animal imaging of the system has been demonstrated.