前瞻性自适应性心电门控胸痛三联扫描模式的临床应用

摘要

Purpose To evaluate the clinical value of triple-rule-out (TRO) computed tomographic angiography using adaptive prospective ECG triggering for chest pain patients.Materials and Methods Sixty patients with chest pain were prospectively collected and randomly divided into group A and group B:group A (n=30) performed prospectively gated axial scan and group B (n=30) performed retrospectively gated helical scan.The vascular density,noise and muscle density of the vessels including aorta,pulmonary artery,coronary artery between the two groups were measured and analyzed.The vascular densityoise ratio,contrast noise ratio and effective dose (ED) between the two groups were calculated.The image quality and scanning radiation dose were compared between the two groups.Results There was no significant difference in the image quality of aorta,pulmonary artery and coronary artery between group A and group B (P＞0.05).The ED in group A was lower than that in group B [(5.90±2.10) mSv vs (11.31 ± 2.12) mSv,P＜0.01].Conclusion The technique of TRO computed tomographic angiography triggered by adaptive prospective ECG can significantly reduce the radiation dose while ensuring image quality.%目的 评价前瞻性自适应性心电门控胸痛三联扫描模式的临床应用价值.资料与方法 前瞻性纳入临床拟行胸痛三联检查的患者60例,随机分为A、B两组,各30例,A组采用前瞻性心电门控扫描模式,B组采用回顾性心电门控扫描模式,测量并分析两组血管(主动脉、肺动脉、冠状动脉)腔内密度、噪声、肌肉密度,计算血管密度/噪声比、对比噪声比及两组有效辐射剂量(ED),比较两组图像质量及扫描辐射剂量.结果 A、B组主动脉、肺动脉、冠状动脉图像质量差异无统计学意义(P＞0.05);A组有效辐射剂量(5.90±2.10) mSv,B组有效辐射剂量(11.31±2.12) mSv,差异有统计学意义(P＜0.01).结论 前瞻性自适应性心电门控胸痛三联扫描模式可在保证图像质量的同时,显著降低辐射剂量.