Objective To compare the difference between linear blending and non-linear blending function for dual-energy CT, and to evaluate the effect on CT image quality. Methods The model was made of a piece of fresh pork liver inserted with 5 syringes containing various concentrations of iodine solutions ( 16.3,26.4,48.7,74.6 and 112.3 HU). Linear blending images were automatically reformatted after the model was scanned in the dual-energy mode. Non-linear blending images were reformatted using the software of optimal contrast in Syngo workstation. Images were divided into 3 groups, including linear blending group, non-linear blending group and 120 kV group. Contrast noise ratio (CNR) were measured and calculated respectively in the 3 groups and the different figure of merit (FOM) values between the groups were compared using one-way ANOVA. Twenty patients scanned in the dual-energy mode were randomly selected and the SNR of their liver, renal cortex, spleen, pancreas and abdominal aorta were measured. The independent sample t test was used to compare the difference of signal to noise ratio (SNR) between linear blending group and non linear blending group. Two readers' agreement score and single-blind method were used to investigate the conspicuity difference between linear blending group and non linear blending group.Results With models of different CT values, the FOM values in non-linear blending group were 20. 65 ±8.18,11.40±4.25, 1.60±0.82,2.40±1.13, 45.49±17. 86. In 74. 6 HU and 112. 3 HU models, the differences of the FOM values observed among the three groups were statistically significant ( P＜0.05),which were 0.30±0. 06 and 14. 43 ±4. 59 for linear blending group, and 0. 22 ±0. 05 and 15.31±5.16 for 120 kV group. And non-linear blending group had a better FOM value. The SNR of renal cortex and abdominal aorta were 19.2±5.1 and 36. 5 ± 13.9 for non-linear blending group, while they were 12.4 ±3.8 and 22.6±7.0 for linear blending group. There were statistically significant differences between the two groups. The conspicuity scores of different organs in non linear blending group were far higher than those in the linear bending group. The Kappa value was 0. 64, showing good consistency. Conclusion Compared to the linear blending method, the non-linear blending method was a better option, especially in improving SNR and conspicuity.

The research of the secondary damage remote from middle cerebral artery territory infarction has made significant progress in recent years.More animal experiments from the cellular,biochemical and molecular levels have been performed for in-depth and detailed research on remote site damage. The injury mechanisms such as oxidative damage and β amyloid deposition have been found.The new imaging detection technologies,such as magnetic resonance diffusion tensor imaging(DTI),have gradually been applied to the diagnosis of remote site damage.

Objective To improve the method for the Word-Stock file update and cancel the Disk P mapping in order to meet the requirements of HIS such as Out-Patient Doctor Workstation system and Nurse system.Methods Two tables were created to store the names,contents and update time of the dictionary,and the word-stock file was built through searching the data of the tables.Results The word-stock file update was improved successfully.Conclusion The new method for the word-stock file update is easy to be achieved so that the program of client can update immediately,which also can get rid of the error and hidden troubles.

Objective To detect EB virus in peripheral blood of patients with non-hodgkin lymphoma (NHL) by ramification amplification method (RAM).To investigate the relativity of NHL with infection of EB virus.Methods RAM was used to detect EB virus with the man-made target gene sequence of promotor of EBER-1. In 120 cases of patients with NHL, EB virus were detected by RAM, and the result of RAM was compared with that of PCR.Raji cells and NB4 cells were used as positive control and negative control respectively.Results RAM could detect 10 molecular target gene of the exponent.76 cases were positive in 120 cases of NHL patients and the positive rate was 63.3%, The result is identical with that of PCR.Conclusion Ramification amplification method is sensitive, convenient and easy to perform.NHL has a high relativity with infection caused by EB virus.

Objective To discuss the effect of group counseling for medical students in reducing academic procrastination,and explore effective means to improve learning efficiency.Methods 24 students identified as voluntary research subjects were divided into the experimental group and the control group,male and female ratio was 1:1.The experimental group received counseling activities for eight times,the control group members did not receive any intervention.This thesis took use of Procrastination Assessment Scale-Students (PASS) as an evaluation tool in before and after test and tracing test,and did the significance test,as a quantitative analysis of this study.Results The quantitative study showed that the difference between the experimental group and the control group in pre-test was insignificant,indicating these research subjects belong to homogeneous research subjects; differences in pre-test and post-test of the experimental group were significantly greater than the differences of pre-test and post-test in the control group,indicating the group counseling producing an effect on learning procrastination.In order to verify the effect's continuity of the group psychological counseling,a tracking test was conducted on the members three months later.After three months,the tracking test scores of the experimental group and the control group were not significantly lower than the pre-test score.In tracking tests,the experimental group's scores were lower than before-test,indicating the effect of group psychological counseling was sustainable.Conclusions Group psychological counseling activities can reduce academic procrastination of medical school students and the group psychological counseling scheme has effectiveness and feasibility.

Objective:To study the inhibitive effect of SQ on HcaF 16 A 3 cells in vivo.Methods:SQ was given to BALB/C mice after bearng tumors for 10 consecutive days.The therapeutic effect was determined by measurement to tumor weight?immunological function and morphological changes.Flowcytometry and electronic microscope were used to evaluate the distribution of cell cycle.Results:The inhibition rate was 65.68%,NK/M? activities and cytokine production were enhanced by SQ,cell cycle was stopped at the S phase.Necrosis could be seen nuder microscope and characteristic apoptotic body could be seen under electronic microscope.Conclusion:SQ had a significant anti tumor effect by regulate immune system and inhibit tumor cell proliferation.

AIM: The present study was designed to ex amin e the changes in glial fibrillary acidic protein (GFAP) expression during cerebr al ischemia and the effects of ginkgolide B on GFAP expression. METHODS: The focal thrombotic cerebral ischemia was formed by ph otochemistry-induced in tree shrews. GFAP stained by ABC immunohistochemistry an d absorbance were measured with image analyze system. RESULTS: GFAP expression in astrocytes increased significantly ( P

AIM: To observe the effect of platelet-activating factor (PAF) on cultured neuronal viability and glial fibrillary acidic protein (GFAP) expression in cultured astrocytes. METHODS: Neurons and astrocytes obtained from the brain cortex of the embryo and newborn mice respectively were cultured and purified, and they were divided into the control and experimental groups. PAF was added into the experimental groups at concentrations of 4, 8 and 16 ?mol/L. Each group was cultured for 4 h, 24 h and 72 h, respectively. MTT method and immunohistochemistry were used to observe the neuronal viability and GFAP expression in astrocytes, respectively. RESULTS: During different time after adding PAF at different concentrations into cultured neurons and astrocytes, respectively, neuronal viability declined, and the number of astrocytes decreased, but GFAP expression in survival astrocytes increased. The effects were shown to be in a concentration-dependent manner. CONCLUSION: PAF decreases the neuronal viability directly and influences the neuronal survival indirectly by astrocytes.

Objective:To study the effect of trigonelline on the change of indicators of serum transaminase, lipoprotein and liver lipid of model rats with non-alcoholic fatty liver diseases and on the expression level of Bcl-2 and Bax proteins.Methods:A total of 45 SD rats were randomly divided into Fthe control group, model group and trigonelline intervention group. Rats in the control group were fed with the common diet, while rats in the model group and intervention group were fed with the high fat diet. 8 weeks later, the intervention group received the intragastric administration of trigonellin e (with the dosage of 40 mg/kg/d) for 8 weeks; while control group and model group received the intragastric administration of saline with the equal dosage. Blood was taken from the abdominal aorta of rats 8 weeks later, detecting the level of a series of indicators of ALT, AST, TG, TC, HDL-C and LDL-C in the serum. After the rats were sacrificed, detect the indicators of TG, TC, SOD and MDA in the liver tissue of rats, as well as the expression of Bcl-2 and Bax in the liver tissue.Results: Results of histopathologic examination showed that the damage degree of liver for rats in the trigonellineintervention group was smaller than the one in the model group, with significantly reduced hepatic steatosis and the partially visible hepatic lobule. The levels of ALT, AST, TC and LDL-C in the serum of rats in the trigonelline group were significantly reduced, while the change in the levels of TG and HDL-C was not significantly different. The levels of TG, TC and MDA in the liver tissues were significantly decreased, while the level of SOD significantly increased; the expression of Bcl-2 protein in the liver tissues of rats in the trigonelline intervention group was significantly increased, while the expression of Bax protein significantly decreased.Conclusions: The trigonelline contributes to the therapeutic effect of non-alcoholic fatty liver diseases. It can also increase the expression of Bcl-2 protein and decrease the expression of Bax protein in the liver tissues, which can protect the liver.

Objective To study the significance of the expression of β-catenin(β-cat) in Barrett esophagus and esophageal adenocarcinoma (EAC) and the relationship between its expression and clinicopathological factom.Methods By using SP immunohistochemistry technique,β-cat wag detected in the normal esophageal mucosa group (20 cases),Barrett esophagus with dysplasia group (26 cages) and EAC group (50 cases).Results The membranous expression of β-cat appeared in all of nomal esophageal mucosa.The rate of cytoplasmic and/or nuclear expression of β-cat in the Barrett esophagus with dysplasia group and the EAC group was 38.5% (10/26) and 60.0% (30/50) respectively,and compared with the normal esophageal mucosa group,the difference was signfficant (P＜0.01).The rate of cytoplasmic and/or nuclear expression of β-cat in the EAC group with lymphatic metastasis and the EAC group exceeding deep smooth muscle was 90.0% (18/20) and 72.2%(26/36) respectively,and compared with that in the nonlymphatic metastasis and the non-exceeding deep smooth muscle patients [43-3%(13/30) and 28.6% (4/14)],the difference was significant (P＜0.01).Conclusion Cytoplasmic and/or nuclear expression of β-cat might play a role in the carcinogenesis and progression of EAC and might be a predictor indicating the metastatic potential of EAC.