Objective To develop a practical testing system on internet,to offer a modern pattern of practicing testing for diagnostic imaging and to evaluate the effects.Methods Practical testing system for diagnostic imaging based on PACS was set up and its effect was evaluated by students.Results The developed practical testing system combines question bank,image reading tool and answering interface together and has functions of controlling and managing both the questions and students participating in the examination.In the satisfaction survey of students,practicing testing system of diagnostic imaging got a score of 96.75 (full mark 100) and was highly prized.Conclusions This pattern of online testing offers more imaging information and makes practicing examination of diagnostic imaging more vivid and scientific.

Objective To examination the expression levels of plasma miR-31-5p and miR-134-5p in Schizophrenia,Primary discussion for their diagnostic value.Methods Collecting Schizophrenia group,BDAP group and healthy control group,with 90 cases in each group.Detection of plasma miR-31-5p and miR-134-5p expression levels by real-time fluorescent quantitative PCR,the statistical analysis were used to verify differentially expressed miRNA.The diagnostic value of miRNA were evaluated by made receiver operating characteristic(ROC) curves and stepwise Logistic regression analysis.Results The expressed level of miR-31-5p was significantly lower in Schizophrenia group than others (x2 =9.223,P ＜ 0.05).The different expression of miR-3 1-5p compared Schizophrenia group with control group had statistical significance(q =7.85,P ＜ 0.05).The expressed level of miR-31-5p was significantly lower in Schizophrenia group than others(x2 =29.111,P ＜0.05).The different expression of miR-134-5p had statistical significance compared Schizophrenia group with control group(x2 =20.40,P ＜ 0.05),compared Schizophrenia group with BPAD group (x2 =23.18,P ＜ 0.05).The AUCROC of miR-31-5p was 0.617,senstivity was 73.3％,and specificity was 54.4％.The AUCROC of miR-134-5p was 0.696,senstiivity was 84.4％,and specificity was 48.9％,The combined forecast variables of PRE's AUCROC was 0.695,sensitivity was 84.4％,specificity was 48.9％.Conclusion Signal miR-134-5p and it combine with miR-31-5p had the same diagnostic value in SZ,both of them had better diagnostic value than signal miR-31-5p.

Objective To explore the CT features of gastrointestinal tract diospyrobezoar and its complications,to improve the recognition. Methods The plain CT scan of 36 patients with gastrointestinal tract diospyrobezoar confirmed by gastroscope and surgery were analyzed retrospectively.Results The number and location of diospyrobezoar showed by CT were consistent with the results of gastroscope and surgery.There were 1 1 cases of stomach diospyrobezoar,1 9 cases of small intestine diospyrobezoar,and 6 cases of stomach and small intestine diospyrobezoar.32 cases were solitary lesion,and 4 cases were multiple lesions.A total of 41 diospyrobezoars were removed, most of which were wel-l defined ovoid mass.3 1 lesions presented mottled internal gas bubbles with high-density encapsulating wall.6 lesions showed mottled gas pattern without encapsulating wall.4 lesions showed uneven high density.Over time,1 lesion moved in the digestive tract and the boundary and density were changed.Complications:gastric and duodenal diospyrobezoar accompanied by gastric retention,which manifested as a significant expansion of the gastric cavity effusion.Small intestine diospyrobezoar was accompanied by small bowel obstruction,which showed that the proximal intestinal tube of the diospyrobezoar was obviously dilated,and the distal intestine was suddenly collapsed.There was a focal transition zone between them.Conclusion Gastrointestinal tract diospyrobezoar has a variety of CT manifestations,of which oval shape,clear boundary,uneven mass composed of gas and soft tissue are common.