双源 CT不同管电压技术诊断急性胸痛三联症效果比较

目的：对比双源CT胸痛三联检查在两种不同电压下显示急性胸痛患者肺动脉、主动脉及冠状动脉的图像质量以及患者所受的辐射剂量，以评估低电压扫描在急性胸痛患者推广应用的可行性。方法利用双源C T胸痛三联扫描模式，结合回顾性心电门控技术对361例胸痛三联检查患者进行统计分析，比较主动脉、肺动脉及冠状动脉的图像质量及辐射的有效剂量。结果120kV组与100kV组在图像质量的主观评分对比中差异无统计学意义（P＞0．05），在患者辐射剂量的对比中，120kV组的辐射剂量大于100kV组，差异有统计学意义（P＜0．05）。结论双源CT胸痛三联检查两种不同管电压扫描对急性胸痛患者的肺动脉、主动脉及冠状动脉的成像质量无影响，并且应用100kV 管电压扫描可以降低患者所受的辐射剂量，可以作为急性胸痛患者的首选。

A comparative study for Triple-Rule-out with different tube voltage technique of Dual-Source CT in acute chest pain

Objective To compare the value of triple-rule-out （TRO） dual-source computed tomography angiog-raphy in acute chest pain patients with diseases of pulmonary artery ,aortic and coronary artery and radiation dose in two different voltage as well as the feasibility of generalizing and applying in patients with acute chest pain . Methods 361 patients with chest pain were analyzed statistically underwent triple-rule-out （TRO） dual-source CT combined with retrospective ECG-gated technique ,and then compare with image quality of aorta ,pulmonary artery and coronary artery and effective radiation dose .Results Subjective score of image quality of the voltage 120kV and 100kV group had no statistical significance（P〉0.05） .The difference was statistically significant（P〈0.05）in comparison of radiation dose .The effective radiation dose of the voltage 100kV group was lower than that of the voltage 120kV group .Conclusion The quality of pictures of pulmonary artery ,coronary artery and aorta are not affected in different tube tension examination of triple-rule-out （TRO） with dual-source CT ,and the radiation dose is reduced with tube tension 100kV which is regarded as the first choice for the patients with acute chest pain .