Comparative Study Of Imaging Techniques And Imaging Findings In Patient With Diffuse Ground Glass Pulmonary Lesions

Objectives To discuss the diagnostic value of the imaging methods:DR,MSCT, HRCT(matrix 512 X 512),Ultra HRCT(matrix 1024 X 1024)and so on--and image post-processing technologies-- Maximum intensity projection(MIP),Minimum intensity projection (MinIP)—in the patient with diffuse ground glass pulmonary lesions; To discuss the diagnostic value of imaging findings (In particular, the basic images of CT) in the diagnosis of diffuse ground glass pulmonary lesions.Date and methods:116 patients with diffuse ground glass lung lesions who lived in our hospital from January 2013 to December 2014 were analyzed retrospectively. Some patients were confirmed by surgical pathology, lung biopsy, fiberoptic bronchoscopy biopsy and etiology examination,others were diagnosed by clinical comprehensive diagnosis. All patients were performed X-ray examination(DR), MSCT examination, HRCT or Ultra HRCT examination. All the images of CT examination have been done post-processing in the workstation. Post processing techniques include maximum intensity projection(MIP), minimum intensity projection (minIP),multiplanar reformation(MPR) and so on. The data of the task is count data,so the chi square test was used for hypothesis testing(P<0.05).SPSS of version 17 statistical software was used to process the data.Results:Interstitial lung disease has 32 cases, accounting for 27.6%. Nodules, mesh-like and wire-like lesions of two pulmonary fields is used to find in fine bronchitis, pulmonary interstitial edema, idiopathic pulmonary interstitial fibrosis widely, collagen disease, sarcoidosis, military tuberculosis, lupus pneumonitis,lymphangitic carcinomatosis, metastatic carcinoma of lung. Parenchymal lung disease in 40 cases,’account for 34.5%.Double parahilar butterfly sign change is used to find in cardiogenic pulmonary alveolar edema. Patchy, sheet density increased, in bronchiectasis and inflammatory changes etc. Double lung diffuse, scattered shadows of high in size is not a nodular density, more common in metastatic tumor, lung Staphylococcus aureus pneumoriia.Diffuse lung, scattered in the small dot density increased, common in the early silicosis, bronchioloalveolar carcinoma etc. Mixed pulmonary disease (alveolar interstitial type) 44 cases, accounting for 37.9%. In malignant mediastinal lymphoma infiltration of the lungs, adult respiratory distress syndrome, Staphylococcus aureus pneumonia, traumatic wet lung, cardiogenic pulmonary edema, pulmonary metastasis, bronchioloalveolar carcinoma.DR correctly diagnosed 59 cases, diagnostic accuracy was 50.9%(59/116).MSCT correctly diagnosed 79 cases, diagnostic accuracy was 68.1%(79/116). The number of correctly diagnosed was 51 of 63 cases in HRCT; The number of correctly diagnosed was 50 of 53 cases in Ultra HRCT. HRCTand Ultra HRCT total number of correct diagnosis in 101 cases, namely the correctly diagnostic accordance rate was 87.1%(101/116). The data were divided into 4 groups:DR group, MSCT group, contrast, HRCT group.P<0.05 was considered as statistically significant, which can be thinked clinical and pathological image coincidence rate between three groups had significant difference. A further three among the two two groups contrastive analysis, statistical results showed, P values were less than 0.05, the difference was statistically significant, can think of three between the two two groups compared difference. The coincidence rate of MSCT group and HRCT group was better than that in DR group, HRCT group, the coincidence rate was better than that in MSCT group. Comparative analysis of HRCT group and Ultra HRCT group, the P<0.05, the difference was statistically significant, can think of two groups of images and clinical, pathological coincidence rate is obviously different, the coincidence rate of ULTRA HRCT group is better than that of HRCT group.Maximum intensity projection (MIP) for small lung nodules display and minimum intensity projection (MinIP) for pulmonary ground glass opacity exists and to determine.Te scope of the sensitive rate is 100%, for the above signs they are superior to DR, MSCT, HRCT.Conclusions:1 DR, MSCT, HRCT, Ultra HRCT imaging methods and maximum intensity projection (MIP), minimum intensity projection (MinIP) and other image processing technologies have an important value in the diagnosis of ground glass opacity, The HRCT (matrix 512×512,1024×1024) is better than DR, MSCT examations. The Ultra HRCT (matrix 1024 × 1024) is better than HRCT(matrix 512×512),so it has particularly obvious advantages.for DR, MSCT, DR, MSCT, HRCT combined with the maximum intensity projection (MIP), minimum intensity projection (MinIP) and other image processing technologies will have important value in the diagnosis of diffuse ground glass pulmonary lesions2 The different basic features of pulmonary imaging, especially CT signs,are important to narrow the range of diagnosis of diseases, so it has important significance to further clarify the nature of disease.