双源CT原理与临床应用

目的：探讨双源CT的结构、原理及其在冠状动脉成像的优势和双能技术的临床应用价值。方法：对西门子双源64层螺旋CT的结构进行分析，结合文献对双源CT在心脏冠状动脉成像的优势与常规多层CT进行了比较，探讨了其双能技术的临床应用价值。结果：双源CT的双球管探测器结构具有时间分辨率高．在不控制心率的情况下获得高质量的冠状动脉血管图像的优点；其双能技术可以用于鉴别组织成分、显示特定的组织，评价增强时组织的碘含量及其血流灌注和去除骨及钙化等。结论：双源CT能提高对冠状动脉病变的诊断准确性和CT对不同组织的鉴别能力，为CT诊断提供更多的信息。

Principal and clinical application of dual-source CT

Objective To discuss the construction and principal of dual-source CT, as well as its superiorities in imaging of heart coronary artery and the clinical application of dual energy technique. Methods The structure of Siemens 64-slice CT was analyzed. The superiorities of dual-source CT in imaging of heart coronary artery were compared with conventional multi-slice CT, and the clinical value of dual energy technique was discussed. Results The dual-source computed tomography had high temporal resolution superiority,and high quality coronary artery CT angiography could be acquired without heart rate control. Dual energy technique could be applied to differentiate tissue component, display given tissue, evaluate the content of iodine in tissue. Conclusion Dual-source CT can not only enhance the diagnosis veracity of pathological changes of heart coronary artery but improve the ability of CT in tissue differentiation.