Objective:To explore the value of CT thoracic angiography triple examination to the cause of sudden chest pain. Methods:60 cases with sudden chest pain,using retrospective ECG-gating technique,underwent CT thoracic angiography triple examination. Restruction were obtained and displayed coronary artery,pulmonary artery,aortic and other structures. Comparative analysis between CT angiography and post-processing images were made by two radiologists. Results:All the CT images clearly showed bilateral pulmonary artery,coronary artery trunk and main branches,thoracic aorta and other structures,which showed 21 cases of coronary artery stenosis,15 cases of pulmonary embolism,4 cases of aortic dissection,16 cases of other lesions,4 cases with no abnormal. Conclusions:128-slice CT thoracic angiography triple examination can diagnose the disease of pulmonary arterty,aortic,coronary artery and other blood vessels,and other non-vascular chest lesions. It also has an important value in di-agnosis of the cause of sudden chest pain.%目的：探讨128层CT胸部血管三合一成像对突发胸痛病因诊断的价值。方法：对60例临床突发胸痛的患者采用回顾性心电门控技术，行128层CT心胸血管三合一成像，利用图像后处理技术显示冠状动脉、肺动脉、主动脉及胸部其他组织结构。由2名放射科医师对图像进行观察，对疾病进行诊断，并以心血管造影结果为标准进行对照分析。结果：60例行128层CT一站式扫描均能清晰显示双肺动脉、冠状动脉主干及主要分支、胸主动脉及心胸其他组织结构，其中冠状动脉狭窄21例，肺动脉栓塞15例，主动脉夹层4例，其他病变16例，未见异常4例。结论：128层CT胸部血管三合一成像不但能对肺动脉、主动脉、冠状动脉等血管疾病作出诊断，还可明确胸部其他非血管性病变，对突发胸痛的病因诊断有很高的临床价值。
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