Based On The Third Generation SOMATOM Dual Source Force CT

Purpose:By comparing images with different layer thicknesses,find a measure that can improve the diagnostic efficiency and accuracy of imaging diagnosticians and reduce the rate of missed diagnosis,so as to meet the imaging doctor’s requirements for rapid and accurate diagnosis of pulmonary embolism,allowing clinicians to have relatively sufficient reaction time Treat patients in time.Materials and methods:A retrospective analysis of 201 patients with clinically suspected diagnosis of pulmonary embolism from March 2019 to October 2019 of Jilin University Sino-Japanese Lianyi Hospital,through the use of the third-generation SOMATOM Force dual-source CT scan,the final enrollment confirmed 53 patients Name,with 0.75 mm layer thickness and layer spacing of 0.5mm as the reference image group A,reconstruct images of three different layer thicknesses of 1.5mm,2.5mm and 5.0mm,the layer spacing is 1.0mm,2.5mm and 5.0mm respectively.Two radiologists with 5 years of diagnostic experience diagnosed and recorded the number and average reading time of vascular embolism emboli at various levels in 4 groups of different images,and analyzed the difference in effect by using SPSS 20.0 statistics.Result:The two radiologists were identical in observing the average reading time of the four groups of images with different layer thicknesses and the display of pulmonary embolism in the lung segment and sub-segment.There is a significant difference in the comparison of the pulmonary embolism embolism in the 5.0mm layer thick axial image,and there is no significant difference in comparison with the 1.5mm and 2.5mm layer thick axial embolism;in the sub-segment pulmonary embolism display,0.75 mm There is no obvious difference between the axial reference image and the 1.5mm axial image in the comparison of pulmonary embolism emboli,but there is a statistical difference between the other two groups,and it is significantly better than the 2.5mm and 5.0mm axial images,and with the layer thickness The increase in reading time is longer and longer;compared with the 0.75 mm and 1.5mm axial images,the 2.5mm and5.0mm layer thickness axial images are less effective for single branches or solitary pulmonary embolism.Conclusion:The 1.5mm reconstructed slice thickness CT image can not only meet the requirements of the accuracy of PE diagnosis,but also improve the efficiency of PE diagnosis,allowing clinicians to have a relatively sufficient response time to treat patients in time.