This study aims to explore the clinical value of the computer-aided diagnosis (CAD) system for early detection of the pulmonary nodules on digital chest X-ray. A total of 100 cases of digital chest radiographs with pulmonary nodules of 5-20 mm diameter were selected from Pictures Archiving and Communication System (PACS) database in West China Hospital of Sichuan University were enrolled into trial group, and other 200 chest radiographs without pulmonary nodules as control group. All cases were confirmed by CT examination. Firstly, these cases were diagnosed by 5 different-seniority doctors without CAD, and after three months, these cases were re-diagnosed by the 5 doctors with CAD. Subsequently, the diagnostic results were analyzed by using SPSS statistical methods. The results showed that the sensitivity and specificity for detecting pulmonary nodules tended to be improved by using the CAD system, especially for specificity, but there was no significant difference before and after using CAD system.
China ; Diagnosis, Computer-Assisted ; Early Diagnosis ; Humans ; Lung ; pathology ; Radiographic Image Enhancement ; Radiography, Thoracic ; Thorax

Objective The explore the feasibility of the left radial approach in treatment of patients with acute myocardial infarction by percutaneous coronary intervention.Methods A total of 114 patients with acute myocardial infarction were divided into right radial approach (right side group,n=54) and left radial approach (left side group,n=60).The time of puncture,catheteRin place of coronary artery originating,catheteRsuccess rate of first operation,the choice difference of guide wire,contrast agent dose,radioactive ray′s volume,the success rate and complications of intervention therapy were compared between two groups.Results There were no significant differences in the time of puncture,contrast agent dose,the success rate and complications of intervention therapy between two groups,but there was no significant difference in the choice of guide wire between two groups.The contrast catheteRtime and success rate of catheteRplacement in the left radial artery group were higheRthan the right radial artery group.There were no significant differences in the total amount of contrast agent,the success rate of interventional treatment and complications between the two groups,but the total amount of radiation exposure in the left radial artery group was less than the right radial artery group.Conclusion The left radial approach is a safe and effective way in treatment of patients with acute myocardial infarction underwent percutaneous coronary intervention.

Objective The explore the feasibility of the left radial approach in treatment of patients with acute myocardial infarction by percutaneous coronary intervention.Methods A total of 114 patients with acute myocardial infarction were divided into right radial approach (right side group,n=54) and left radial approach (left side group,n=60).The time of puncture,catheteRin place of coronary artery originating,catheteRsuccess rate of first operation,the choice difference of guide wire,contrast agent dose,radioactive ray′s volume,the success rate and complications of intervention therapy were compared between two groups.Results There were no significant differences in the time of puncture,contrast agent dose,the success rate and complications of intervention therapy between two groups,but there was no significant difference in the choice of guide wire between two groups.The contrast catheteRtime and success rate of catheteRplacement in the left radial artery group were higheRthan the right radial artery group.There were no significant differences in the total amount of contrast agent,the success rate of interventional treatment and complications between the two groups,but the total amount of radiation exposure in the left radial artery group was less than the right radial artery group.Conclusion The left radial approach is a safe and effective way in treatment of patients with acute myocardial infarction underwent percutaneous coronary intervention.