| Objectives 1 Based on the gold standard of bronchoscopy,the diagnostic value of CT and MRI in children’s plastic bronchitis was compared,2 the influence of lung MRI breath holding scan and free breathing + diaphragm navigation on image quality was compared.Methods This study was carried out after the approval of the ethics committee of our hospital.We chose to visit Tangshan maternal and child health care hospital from November 2018 to November 2019.The reasons for the visit were repeated high fever,cough and expectoration.After antibiotic treatment for 7 days or more,the clinical symptoms did not improve or worsen.CT examination showed pulmonary consolidation.The selected patients had at least two pulmonary segments or more consolidation accumulatively,After discussion by clinicians,68 children underwent bronchoscopy,including 36 males and 32 females,aged between 6 and 12 years,with an average age of 9.20 ± 2.05 years.Before bronchoscopy,MRI was performed in the lung.CT,MRI and bronchoscopy were performed within 2 days.All the children cooperated well.68 children were randomly divided into two groups,34 cases in each group.They were divided into breath holding scanning group(20 males,14 females,average age 9.47 ± 1.81 years)and free breathing + diaphragm navigation group(16 males,18 females,average age 9.03 ± 1.93 years).Bronchoscope was used as gold standard to compare the detection rate of CT and MRI for children’s plastic bronchitis,MRI screen was compared The influence of air scanning and free breathing + diaphragm navigation on image quality.The database was established by Excel 2007 and analyzed by spss20.0.The normal distribution of measurement data is expressed by,and the comparison is made by t-test,usually P < 0.05 is statistically significant.The use cases and percentages of counting data are expressed by chi square test or Fisher’s exact probability method.Generally,P < 0.05 is statistically significant.Results 1 There was no significant difference(P > 0.05)between the average age of the children examined by MRI with different scanning methods(P = 0.335),2 The location of pulmonary consolidation by CT: 21 cases in the upper lobe of the right lung,14 cases in the middle lobe,8 cases in the lower lobe,9 cases in the upper lobe of the left lung,16 cases in the lower lobe,14 cases in the upper lobe of the right lung,8 cases in the middle lobe,2 cases in the lower lobe,6 cases in the upper lobe and 4 cases in the lower lobe,7 cases in the upper lobe,6 cases in the middle lobe,6 cases in the lower lobe,and 4 cases in the left lung in the MRI free breathing group There were 3 cases in the upper lobe and 12 cases in the lower lobe,CT showed other signs(including pleural effusion,atelectasis and pneumothorax): 40 cases with pleural effusion,32 cases with atelectasis and 2 cases with pneumothorax,MRI breath holding scanning group: 18 cases with pleural effusion,21 cases with atelectasis and 0 cases with pneumothorax,MRI free breathing group: 22 cases with pleural effusion,11 cases with atelectasis Two cases had pneumothorax.with bronchoscope as the gold standard,after bronchoscopy,57 children were diagnosed as plastic bronchitis,of which 40 were positive by CT and 51 were positive by MRI.The difference between CT and MRI was statistically significant(P < 0.05).3.Comparison of image quality scores under two different scanning modes: in the MRI breath holding scanning group,the image quality was 3-point in 8 cases,2-point in 20 cases,1-point in 6 cases,with an average score of 2.06 ± 0.64;in the MRI free breathing group,the image quality was 3-point in 18 cases,2-point in 12 cases,1-point in 4 cases,with an average score of 2.41 ± 0.69.By comparing the average score of image quality between the two groups,P = 0.035,the difference was statistically significant(P < 0.05).Conclusions 1 MRI is better than CT in the diagnosis of plastic bronchitis in children,2 Compared with free breath + diaphragm navigation,the image quality of free breath + diaphragm navigation is better than that of MRI.Figure 3;Table 5;Reference 129... |
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