目的 探讨64层螺旋CT胸痛三联 症低剂量成像的临床应用价值。方法 以 我院放射科收治的因急性胸痛就诊并拟 行胸痛三联扫描的108例患者为研究对 象，所有患者根据体质量指数(BMI)不 同选择管电压，若BMI≥24kg/m2 ，管电 压为120Kv；若BMI＜24kg/m2 ，管电压 为100Kv。将其为A组、B组，A组为BMI ＜24kg/m2 (58例)，采用前瞻性心电门控 技术扫描；B组为BMI≥24kg/m2 (50例)， 采用回顾性心电门控技术扫描，分析64层 螺旋CT胸痛三联症低剂量成像的临床应 用价值。结果 A组患者图像质量与B组相 比，无显著差异(P＞0.05)；A组受限剂量 与B组相比，存在显著差异，P＜0.05。结 论 64层螺旋CT胸痛三联症低剂量成像的 临床应用价值高，图像质量可靠，患者承 受的辐射剂量少，具有较高的临床应用价 值，值得推广。

Objective To evaluate clinical application value of triad low-dose imaging of 64-sliced spiral CT chest pain. Methods One hundred and eight patients with chest pain admitted by the Radiology Department of the Hospital who were proposed to because of acute chest pain triad scanning were selected as research subjects, and the tube voltages were selected for patients according to different body mass indexes (BMI), the tube voltage at 120 KV was chosen if BMI was equal to or greater than 24 kg/m.The tube voltage at 100 kv was selected if the BMI was less than 24kg/m2.Both Group A and group B were satisfied, prospective heart scanning switch control technology was applied when BMI was less than 24kg/m2 (58 cases), and retrospective heart scanning switch control technology was applied when BMI of patients in Group B satisfied 24 kg/m or more (50 cases), and clinical application value of triad low-dose imaging of 64-sliced spiral CT chest pain was analyzed. Results There was no significant difference when the image quality of patients in Group A was compared to that of patients in Group B (P>0.05). There was significant difference when limited dose of patients in Group A was compared to that of patients in Group B (P<0.05). Conclusion Triad low-dose imaging of 64-sliced spiral CT chest pain delivers high clinical application value of low-dose imaging, the image quality is reliable, and it makes patients suffer from less radiation dose and has high clinical value, being worthy of promotion.