中文摘要：

基于锥束CT的实时成像系统经常要求实时获得投影数据并快速重建，如何将获得的投影数据不丢失地快速传递到图像重建单元进行重建是系统设计的一个关键问题。本文提出了一种基于Linux和以太网的数据获取方案，通过在探测器和重建计算机之间引入投影数据缓存系统，较好地解决了重建计算机和CT采集模块间由于实时性能差异所造成的通讯不稳定和数据丢失。本方案所设计的系统成本低廉、易于实现并且具有较好的通用性，对一个快速数据获取和重建系统而言具有较强的实用价值。

英文摘要：

With the fast development of the CT technology, real-time data acquiring and fast image reconstruction as a advanced capability in a Cone-beam CT system are more frequenfly requested. Therefore to transfer projection data from the detector unit to the computing unit in a fast and stable way becomes one of the key points in today＇s design of CT systems. In this paper we proposed a high speed data transmission solution based on Ethernet interface and Linux OS in which a transfer caching system is introduced. Test results show that such application has significant merits in solving the data loss problem while transferring from CT sampling module to the PC. Being with a low cost yet high stability and efficiency, it can be practically useful to the similar fast data acquiring system for image reconstruction.