应用低剂量对比剂肺动脉CTA成像检查肺动脉栓塞的可行性研究

Feasibility Study of Pulmonary Artery CTA Imaging with Low-Dose Contrast Agent for Pulmonary Embolism

目的探讨应用低剂量对比剂肺动脉CTA成像检查肺动脉栓塞的可行性。方法选取本院2017年1月至2019年7月收治的78例肺动脉栓塞患者的临床资料。所有患者均接受CTA检查,根据对比剂量,将患者分为常规组和低剂量组。观察患者MSCT图像,对比两组血管强化情况和图像质量。结果不同剂量中肺主动脉及其分支强化后CT值均符合评价标准,两者比较差异无统计学意义(P>0.05),常规组强化后左肺静脉、右肺静脉CT值分别为(256.19±51.34)HU、(268.33±49.86)HU,高于低剂量组[(105.11±43.12)HU、(126.12±31.25)HU],差异有统计学意义(P<0.05);常规组图像质量总优良率为87.17%(34/39),低剂量组76.92%(30/39),两组比较差异无统计学意义(P>0.05)。结论低剂量对比剂肺动脉CTA成像对PE检查可行性高,图像质量较佳,可有效区分肺动静脉影像,值得临床推广。

Objective To investigate the feasibility that CTA imaging of pulmonary artery with low-dose contrast agent was used to examine pulmonary embolism.Methods The clinical data of 78 patients with pulmonary embolism admitted to our hospital from January 2017 to July 2019 were selected.All patients underwent CTA.Patients were divided into regular and low dose groups according to dose of contrast media.The MsCT images of the patients were observed,and the vascular enhancement and image quality of the two groups were compared.Results The CT values of the pulmonary aorta and its branches in different doses after the enhancement were in accordance with the evaluation criteria.There was no significant difference between the two groups(P>0.05).In the conventional group,the CT values of the left pulmonary vein and right pulmonary vein were(256.19±51.34)HU,(268.33±49.86)HU,respectively,higher than those in the low dose group,(105.11±43.12)HU and(126.12±31.25)HU,the difference was statistically significant(P<0.05).The total excellent and good rate of image quality in the conventional group was 87.17%(34/39),and that in the low dose group was 76.92%(30/39).There was no significant difference between the two groups(P>0.05).Conclusion CTA imaging of pulmonary artery with low-dose contrast media is highly feasible for PE examination,and the image quality is better,which can effectively distinguish pulmonary arteriovenous images.It is worthy of clinical promotion.