128层螺旋CT一站式低剂量成像在胸痛三联征中的应用

Application of One-station Low Dose Imaging of 128-Slice Spiral CT in Chest Pain Triad

目的:探讨128层螺旋CT一站式低剂量成像在胸痛三联征中的临床应用价值。方法:回顾性分析2014年6月至2016年12月期间于我院以急性胸痛为主要症状就诊并行128层螺旋CT一站式成像检查的93例患者的临床及影像资料,所有患者根据体质量指数(BMI)不同选择管电压,将其分为A、B组,A组为BMI<24kg/m^2(49例),管电压为100kV,采用前瞻性心电门控技术扫描;B组为BMI≥24kg/m^2(44例),管电压为120k V,采用回顾性心电门控技术扫描。并对A、B两组的有效辐射剂量及图像质量进行对比分析。结果:A、B两组均获得满意图像,A组患者图像质量与B组相比,无显著差异(P>0.05);A组的平均有效剂量与B组相比,存在显著差异(P<0.05)。结论:对于急性胸痛的患者,在心率相对平稳的状态下,采用前瞻性心电门控技术与低管电压相结合扫描,影像质量完全可以满足诊断需求,又显著降低了辐射剂量,值得临床推广。

Objective： To explore the clinical value of 128 slice spiral CT low dose imaging in patients with chest pain. Methods： The clinical and imaging data of 93 patients with acute chest pain admitted in our hospital from June 2014 to December 2016 received 128 slice spiral CT with one station imaging examined were analyzed. According to body mass index（ BMI） of different tube voltage,all the patients were divided into group A and B,group A,BMI 24kg/m^2（ 49 cases）,100 k V tube voltage,using prospective ECG gated scan; group B,BMI = 24kg/m^2（ 44 cases）,120 k V tube voltage,using retrospective ECG gated scanning.The effective radiation dose and image quality of two groups were compared and analyzed. Results： The two groups obtained satisfactory images,and there was no significant difference in image quality between group A and group B（ P〈0.05）. The average effective dose of group A was significantly different from that of group B（ P〈0.05）. Conclusion： For patients with acute chest pain,heart rate in the state is relatively stable,using prospective ECG gating technology and the combination of low tube voltage scanning,image quality can meet the requirement of diagnosis,and significantly reduce the radiation dose,is worthy of promotion.