摘要
目的 分析肺动脉CT血管造影(CTA)检查技术和不同图像后处理方法对急性肺动脉栓塞诊断的影响。方法 选取2022年6月-2024年5月赣州市赣县区人民医院诊治的62例疑似急性肺动脉栓塞患者为研究对象,采用随机数字表法将其分为对照组和研究组,各31例。两组患者均按照相同流程行CTA检查,对照组使用320 mgI/ml或350 mgI/ml的对比剂,注射速度3.5~4.5 ml/s,扫描起始于肺尖,自上而下;研究组用300 mgI/ml浓度的对比剂,注射速度为3 ml/s,扫描方向自下而上,研究组的数据保持原始状态,而对照组的数据被重建成1.25 mm厚度的图像。分析不同扫描条件与不同图像处理方法[容积再现(VR)、最大密度投影(MIP)、多平面重建(MPR)]对诊断急性肺动脉的影响。结果 最终确诊为急性肺动脉栓塞的患者共有43例,确诊率为69.35%,其中研究组23例,对照组20例。研究组对亚段动脉、段动脉内栓子的检出率优于对照组(P<0.05),两组叶动脉、肺动脉与主干内栓子检出率对比,差异无统计学意义(P>0.05);VR、MIP与MPR 3种图像后处理技术叶动脉、肺动脉与主干内栓子检出率对比,差异无统计学意义(P>0.05);MPR亚段动脉、段动脉内栓子检出率高于MIP,MIP亚段动脉、段动脉内栓子检出率高于VR(P<0.05)。结论 CTA检查技术和图像后处理方法在急性肺动脉栓塞患者中的诊断价值确切,可以提升诊断急性肺动脉栓塞的准确率,值得临床应用。
Objective To analyze the effect of pulmonary CT angiography(CTA)and different image post-processing methods on the diagnosis of acute pulmonary embolism.Methods From June 2022 to May 2024,62 patients with suspected acute pulmonary embolism diagnosed and treated in Ganzhou Ganxian District People's Hospital were selected as the research objects.They were divided into control group and study group by random number method,with 31 patients in each group.Two groups of patients were performed CTA examination according to the same process.The control group used 320 mgI/ml or 350 mgI/ml contrast agent,the injection speed was 3.5-4.5 ml/s,the scan started from the tip of the lung,and the scanning direction was up-bottom;the study group used a contrast agent with a concentration of 300 mgI/ml,the injection speed was 3 ml/s,and the scanning direction was bottom-up.The data of the study group remained the original state,while the data of the control group was reconstructed into an image of 1.25 mm thickness.The effects of different scanning conditions and different image processing methods[volume rendering(VR),maximum intensity projection(MIP),multiplanar reconstruction(MPR)]on the diagnosis of acute pulmonary artery were analyzed.Results A total of 43 patients were finally diagnosed with acute pulmonary embolism,with a diagnosis rate of 69.35%,including 23 patients in the study group and 20 patients in the control group.The detection rate of embolus in subsegmental artery and segmental artery in the study group was better than that in the control group(P<0.05),while there was no significant difference in the detection rate of embolus in lobar artery,pulmonary artery and trunk between the two groups(P>0.05).There was no significant difference in the detection rate of emboli in the lobar artery,pulmonary artery and trunk between VR,MIP and MPR(P>0.05).The detection rate of emboli in MPR sub-segmental artery and segmental artery was higher than that of MIP,and the detection rate of emboli in MIP sub-segmental artery and segmental artery was higher than that of VR(P<0.05).Conclusion The diagnostic value of CTA examination technology and image post-processing method in patients with acute pulmonary embolism is accurate,which can improve the accuracy of diagnosis of acute pulmonary embolism,and is worthy of clinical application.
作者
王新艳
WANG Xinyan(Department of Medical Imaging,Ganxian District People's Hospital,Ganzhou 341100,Jiangxi,China)
出处
《医学信息》
2025年第20期147-150,共4页
Journal of Medical Information
关键词
CTA检查技术
图像后处理方法
急性肺动脉栓塞
CTA examination technology
Image post-processing method
Acute pulmonary embolism
