64层螺旋CT冠状动脉血管造影应用技术的初探

目的 初步探讨64层螺旋CT冠状动脉血管造影技术。方法 120例受检者行64层螺旋CT冠状动脉血管成像检查，使用美国GE公司64层螺旋CT，进行回顾性心电门控平扫及增强，原始采集的图像从心动周期的相位窗35％-85％，每间隔5％进行重建，采用平面重建（MPR）、最大密度投影法重建（MIP）、曲面重建（CPR）和容积再现技术（VR）进行图像后处理重建，显示冠状动脉主干及主要分支。结果 心率平稳，心率少于80次／分，64层CT对冠状动脉冠节段图像质量可以用于评价，可较准确地显示冠状动脉通畅情况及管壁病变。心率大于90次／分时，冠状动脉的主要分支显示欠规整。结论 心率平稳且小于80次／分，合理运用重建时相和三维重建技术，64层CT冠状动脉成像可显示较细节段的冠状动脉，可以比较准确诊断冠状动脉病变，具有较高的临床应用价值。

Exploration of the main technique of 64-slice spiral CT coronary angiography

Objective To evaluate the main technique of 64-slice spiral coronary angiography. Methods One hundred and twenty patients had underwent 64-slice CT coronary angiography with GE 64-slice CT scanner. Plain and enhanced imagings were performed by retrospective ECG gating in all patients. The raw data were reconstructed from 35% to 85% with every 5%. The reconstructed images were then processed into volume rendering（VR） and multiplanner reconstruction（MPR） and maximum intensity projection（MIP）, and curved planner reconstruction（CPR） to display the cornary artery and its branches. Results The coronary segments in CT coronary angiography were accessible and could accurately display the coronary arteries and the pathological changes in vessel walls in patients with a heart rate of 〈 80 beats per minute, while 64-slice CT coronary angiography couldn＇t display well small segment of coronary artery in patient with a heart rate of 〉90 beats per minute. Conclusion As raw data were reconstructed well, 64-slice CT coronary angiography can display small segment of coronary artery and assess coronary artery diseases with high accuracy with a stable heart rate of 〈 80 beats per minute, which has highly clinical value.