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【Abstract】Dual-source Computer Tomography is a new revolution and create a new epoch of the history of Computer Tomography .Its key technology of Dual-source Computer Tomography includ: Straton metal X-ray tube with zero-million Hu; electromagnetic direct drive techniques; mute scanning techniques; correction techniques of special scattered X-ray; reconstruction techniques and special X-ray dose control techniques, especially for X-ray dose control techniques by ECG-gated. Dual-source Computer Tomography contained two data acquisition systems and they were mounted onto the roaring gantry with an angular offset 90°. The gantry only rotated 90°when acquired one-slice image, so its temporal resolution can get to 83ms. It could gain high quality image of coronary artery image no matter what the patient heart rate was. Besides, the special dual energy technique could do so many things such as: removal bone and calcification; evaluate blood perfusion of tissue; identify composition of the tissue and display ligaments and cartilage.
【Key words】Dual-source Computer Tomography；Coronary angiography；Dual energy imaging；Data acquisition system；Temporal resolution
CT成像的新纪元－双源CT
【摘要】双源CT是CT史上的新革命，开创了CT成像的新纪元。其核心技术有：Straton零兆金属球管、电磁直接驱动技术、静音扫描技术、特殊散射线校正、重建技术及特殊的射线剂量调控技术，适应性ECG门控剂量调控技术。双源CT具有两套数据采集系统并且呈垂直状态分布于机架内，机架只需旋转90°就能完成数据采集，实现了83ms的恒定时间分辨率，可对任何心率的病人在不行任何心率干预的情况下获得高质量的冠状动脉血管图像。另外，独特的双能量成像技术可用于去除骨骼及钙化、评价组织血流灌注以及鉴别组织成分，显示韧带和软骨等方面，拓宽了CT的临床应用价值。
【关键词】双源CT，冠状动脉成像，双能量成像，数据采集系统，时间分辨率
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