Objective To explore CT and MRI imaging in the application of newly diagnosed esophageal cancer staging.Methods 200 patients with newly diagnosed esophageal cancer were selected as the research object, who voluntarily accepted the chest CT and MRI examination.Newly diagnosed esophageal cancer pathological results and CT,MRI features were observed.Spiral CT,MRI for T staging of esophageal cancer and N staging diagnosis were compared.Results In 200 patients,including 160 cases of squamous cell carcinoma,30 cases of adenocarcinoma, 10 cases of other types,T1 ,T2 ,T3 and T4 clinical staging period were respectively 19 cases,47 cases,81 cases and 53 cases,while N0 and N1 period were 65 cases and 135 cases respectively.The lesion diameter was 10 -22 (16.5 ± 4.6)mm.CT and MRI showed irregular thickening of the esophageal wall,CT showed equal or slightly lower density, T1 WI was MRI or low signal,T2 WI showed a slightly higher signal.Enhanced scanning,a substantial part of lesion enhancement,while the dead part had no enhancement.In T1 ,T2 of the diagnosis of esophageal carcinoma,MRI had higher diagnostic sensitivity and accuracy compared with CT,and the difference was statistically significant (χ2 =4.32,3.89,all P <0.05).In T3 ,T4 of the diagnosis of esophageal carcinoma,there were no statistical significance of MRI and CT of the diagnostic sensitivity,specificity and accuracy rate difference (P >0.05).By using the joint appli-cation of the two methods,the diagnostic sensitivity and accuracy were significantly higher than that used alone,the difference was statistically significant (χ2 =4.12,3.98,all P <0.05).In the diagnosis of N0 and N1 in esophageal cancer,MRI had a higher sensitivity,there were statistically significant difference compared with CT (χ2 =4.54, 4.23,all P <0.05).The two methods had no significant difference in N0 and N1 phase specific diagnosis of esophage-al cancer and the correct rate (P >0.05).The combined application of MRI and CT significantly improved the diag-nostic sensitivity and accuracy.Compared with the single application,the difference was statistically significant (χ2 =4.32,4.54,all P <0.05).Conclusion MRI is more sensitive to diagnosis T1 ,T2 stage and N0 ,N1 stage in esopha-geal carcinoma.Combined application of MRI and CT can improve the diagnostic sensitivity and accuracy.

Objective To evaluate the value of computed tomography myelography(CTM)in diagnosing the laceration of brachial plexus. Methods Sixteen cases with brachial plexus injury underwent thin-slice high resolution CT scanning two hours after the examination of conventional lumber puncture myelographs.The results of CTM in patients were compared with surgical exploretation and seven patients underwent preoperatively electrophysiological examination .Results There were totally 28 nerve roots injury.Of them,26 were detected by CTM,the accuracy was 92.8%.The main signs of nerve root laceration were the disapperance of the filling defect of ventral and forsal root,the indirect signs were false meningeal cyst,displacement and deformation of spinal cord,twist of nerve root.Conclusion CT myelography is of significant value in diagnosing the laceration of nerve root.