多层螺旋CT双低技术扫描对肺动脉血管成像图像质量的影响  

Effect of Multi-slice Spiral CT Dual Low Technology Scanning on Image Quality of Pulmonary Artery Angiography

作　　者：于丹丹[1] 崔萌萌 Yu Dan-dan;Cui Meng-meng(Medical Imaging Department of Zhengzhou Sixth People's Hospital,Zhengzhou 450000,Henan Province,China)

机构地区：[1]郑州市第六人民医院医学影像科,河南郑州450000

出　　处：《罕少疾病杂志》2023年第9期46-47,69,共3页Journal of Rare and Uncommon Diseases

摘　　要：目的 探究多层螺旋CT双低技术扫描对肺动脉血管成像图像质量的影响。方法 70例疑似肺动脉栓塞患者,均接受肺动脉CT血管造影(CTA)检查,随机分为A组、B组,各35例,检查中分别实施常规多层螺旋CT扫描(管电压120kV,碘海醇350g/L)、双低技术扫描(管电压100kV,碘海醇270g/L),均以iDose~4图像重建,以肺动脉造影结果为“金标准”,比较两种扫描方式诊断效能及对肺动脉血管成像图像质量的影响。结果 B组诊断准确度、灵敏度、特异度水平与A组相近(P>0.05);B组图像质量评分、图像对比信噪比(CNR)、信号信噪比(SNR)水平均与A组相近(P>0.05);B组肺动脉主干、左肺动脉、右肺动脉、左上叶肺动脉CT值水平均与A组相近(P>0.05);B组肺动脉扫描容积CT剂量指数(CTDlvol)、计量长度乘积(DLP)、平均用碘剂量水平均较A组低(P<0.05)。结论 应用双层螺旋CT双低技术扫描,与常规扫描方法相比,可获得相近检查效果,但可降低用碘量,安全性更理想。Objective To explore the influence of dual low technology multi-slice spiral CT scanning on the image quality of pulmonary artery angiography.Methods 70 patients suspected of pulmonary embolism were examined by pulmonary artery CT angiography(CTA).They were randomly divided into group A and group B,35 patients in each group.During the examination,conventional multi-slice spiral CT scanning(tube voltage 120kV,iohexol 350g/L)and dual low technology scanning(tube voltage 100kV,iohexol 270g/L)were performed respectively.All patients were reconstructed with iDose4 images.The results of pulmonary angiography were the gold standard,To compare the diagnostic efficacy of the two scanning methods and their influence on the image quality of pulmonary artery angiography.Results The diagnostic accuracy,sensitivity and specificity of group B were similar to those of group A(P>0.05);The image quality score,image contrast signal to noise ratio(CNR)and signal to noise ratio(SNR)in group B were similar to those in group A(P>0.05);The CT values of main pulmonary artery,left pulmonary artery,right pulmonary artery and left upper lobe pulmonary artery in group B were similar to those in group A(P>0.05);The volume CT dose index(CTDIvol),measurement length product(DLP),and average iodine dose level of pulmonary artery scanning in group B were lower than those in group A(P<0.05).Conclusion Compared with the conventional scanning method,the double low technique scanning with double spiral CT can achieve similar results,but it can reduce the amount of iodine used and has better safety.

关 键 词：双层螺旋CT 双低技术扫描 肺动脉血管成像 

分 类 号：R445.3[医药卫生—影像医学与核医学]