放射CT血管造影对冠状动脉疾病诊断的临床应用

目的评价放射CT血管造影对冠状动脉钙化斑块检出的影响。方法52例病人采用放射CT血管造影扫描心电门控技术行冠状动脉钙化积分检查，每一病例原始数据进行2种不同层厚（1m和3mm）重建。结果3mm组检出的钙化斑块数最多为52个。其中小钙化斑块数达到45个。以1mm组检出的钙化斑块数及其中的小钙化斑块数为标准，3mm检出的钙化斑块及小钙化斑块敏感性相对较低。结论采用放射CT血管造影容积扫描回顾性心电门控技术检出钙化斑块时，3mm层厚是不适宜的，1m层厚较3mm层厚可以检出更多的钙化斑块，尤其是小钙化斑块，对于临床确定钙化斑块的存在是适合的。

Clinical Application of Radiation CT Angiography Diagnosis of Coronary Artery Disease

Objective To evaluate the impact of radiation CT angiography detection of coronary artery calcified plaque. Methods 52 patients with radiation CT angiography scan ECG-gated coronary calcification score technical inspection, two kinds of different thickness （1 mm and 3 ram） were reconstructed from the original data for each case. Results 3 mm group of calcified plaque detected a maximum of 52, in which the small calcified plaques had reached 45. Taking the number of detected calcified plaque and small number of calcified plaque with 1 mm group as standard, the sensitivity of calcified plaque and small calcified plaque detected with 3 mm group was relatively lower. Conclusion In application of CT angiography radiation volume scanning retrospective ECG-gated technique for detection of calcified plaque, 3 mm thickness technique is inappropriate, but 1 mm thickness technique can detect more calcified plaques than that of 3 mm thickness, especially small calcified plaque, whichi is appropriate for clinical determination of the presence of calcified plaque.