一种高分辨率、三维的、X射线计算机层析成象系统已被建立,并正用于活体的皮质骨骼及柱骨骼结构的研究中。该系统由一个微聚焦X-射线源、旋转及转换级,X射线图象增强器、Vidcon摄像机、视频数字化仪、计算机及阵列处理器构成。旋转序列位置下得到的图象数据被转换成2D投影积分,并利用圆锥束重建算法进行处理。在1 cm~3范围的样本重建组可以由200~3的密度值,这种取样大小的分辨率粗略可当作各向同性(isotropic)具有 A high-resolution, three-dimensional, X-ray computed tomography system has been established and is being used in the study of cortical and columnar bone structures in vivo. The system consists of a micro-focus X-ray source, rotation and conversion stage, X-ray image intensifier, Vidcon camera, video digitizer, computer and array processor. The image data obtained at the rotation sequence position is converted into a 2D projection integral and processed using the cone beam reconstruction algorithm. The sample reconstruction set in the range of 1 cm-3 can have a density value of 200-3, and the resolution of this sample size can roughly be assumed to be isotropic