128层螺旋CT小剂量对比剂肺动脉CTA对PE诊断图像的影响  

Effect of 128-slice spiral CT low-dose contrast agent pulmonary artery CTA on the diagnosis of PE

作　　者：陈日芳 CHEN Rifang(Department of Radiology,Guangdong Second Chinese Traditional Hospital,Guangzhou,Guangdong 510095,China)

机构地区：[1]广东省第二中医院放射科,广东广州510095

出　　处：《影像研究与医学应用》2024年第18期29-31,共3页Journal of Imaging Research and Medical Applications

摘　　要：目的:探讨128层螺旋CT小剂量对比剂肺动脉CT血管成像(CTA)在肺动脉栓塞(PE)的临床应用价值。方法:选取2023年1月—12月在广东省第二中医院行肺动脉CTA检查的69例PE患者为研究对象,根据对比剂的使用剂量分为常规组(36例,注射对比剂80 mL)和小剂量组(33例,注射对比剂30 mL)。评价两组血管强化情况、图像质量及辐射剂量。结果:常规组与小剂量组患者肺动脉主干、肺动脉分支血管强化后CT值比较差异无统计学意义(P>0.05),但小剂量组患者肺静脉血管强化后CT值均低于常规组,差异有统计学意义(P<0.05)。常规组与小剂量组图像质量比较差异无统计学意义(P>0.05)。小剂量组辐射剂量相关的容积CT剂量指数(CTDI_(vol))、长度与剂量长度之积(DLP)以及有效剂量(ED)值均低于常规组,差异有统计学意义(P<0.05)。结论:128层螺旋CT小剂量对比剂肺动脉CTA应用于PE诊断,不仅可保证与常规剂量情况下相同的图像质量,且可降低辐射剂量,值得临床推广。Objective To investigate the clinical application value of 128-slice spiral CT low-dose contrast agent pulmonary artery CT angiography(CTA)in pulmonary embolism(PE).Methods 69 PE patients who underwent pulmonary artery CTA examination in Guangdong Second Chinese Traditional Hospital from January to December 2023 were selected as the study objects.According to the dose of contrast agent,they were divided into the conventional group(36 cases,80 mL injection of contrast agent)and the low-dose group(33 cases,30 mL injection of contrast agent).Vascular enhancement,image quality and radiation dose of the two groups were evaluated.Results There was no significant difference in CT values of pulmonary artery main and pulmonary artery branch vessels after enhancement between conventional group and low-dose group(P>0.05),but CT values of pulmonary vein vessels after enhancement in low-dose group were lower than those in conventional group(P<0.05).There was no significant difference in image quality between conventional group and small dose group(P>0.05).The volume CT dose index(CTDI_(vol)),the product of length to dose length(DLP)and the effective dose(ED)values of the low-dose group were lower than those of the conventional group(P<0.05).Conclusion The application of 128-slice spiral CT low-dose contrast agent pulmonary artery CTA in the diagnosis of PE can not only ensure the same image quality as the conventional dose,but also reduce the radiation dose,which is worthy of clinical popularization.

关 键 词：肺动脉栓塞 肺动脉CT血管成像 128层螺旋CT 小剂量对比剂 

分 类 号：R445[医药卫生—影像医学与核医学]