Objective: To correct the set-up error of patients during radiotherapy is very important for increasing treatment effective. Methods: This paper proposes a registration method based on portal images and reference images. Canny Operator was used to extract edge features. The extracted edge features were set as datum mark to calculate the maximal mutual information between the portal images and reference images. Parameters were optimized with simplex-simulated annealing optimization strategy. Results: The portal images and reference images of 29 patients with the cervix cancer and prostatic carcinoma were registrated in this paper. The results showed that the registration was precise, and the registration speed was increased remarkably. Conclusion: So this registration method can be applied for online estimation for set-up errors in clinical radiation.

Medical image registration plays an important role in the research of medical image processing field. It is widely used in the areas of clinical diagnoses, treatment, quality assurance and evaluation of curative effect. This paper gives an overview on three medical image registration methods Correlation method, mutual information method, and wavelet transform method. Features of these method and their applications are reviewed.

Bleeding Time ; Child, Preschool ; Female ; Hemorrhage ; diagnosis ; Humans ; von Willebrand Diseases ; diagnosis

Long-term potentiation(LTP)is an important form of synaptic plasticity and an objective indicator to investigate learing and memory synaptic mechanisms.With the development of brain slice technology,more and more experiments associated with LTP are carried out on brain slices,which aim to investigate the mechanism in biology and the change in physiology or biochemistry are carried out on the brain slice.This paper gives an overview of recent advances in research of LTP with technology of brain sliceby suchexamples as follows:The regulated expression mechanisms of long-term potentiation at CA1 synapses,the characteristics of LTP induced in hippcampal slices and its relation with the slice-recovery conditions,the enhancement of the magnitude of early longterm potentiation at CA1 hippocampal synapse by the activation of dopamine receptor,and the enhancement of associative long-term potentiation by the activation of β-adrenergic receptors at CA1 synapses in rat hippocampol slices.

Objective To investigate the effect of fast-aging on the excitability of hippocampus CA1 neurons in mouse and the possible interaction between fast-aging and hippocampus. Methods Using brain slice and extracellular recording technique to record the firing of hippocampus CA1 neurons in fast-aging(SA M-P/8) and normal control mice, after preprocessing, neural firing train were obtained. Using neural firing rate and inter-spike-inter to investigate interaction between fast-aging and hippocampal neural firing. Results The neural firing rate of hippocampus CA1 neurons in fast-aging mice is (1.052±0.364) Hz(n=14), while the neural firing ratein normal control mice is (4.416±1.306) Hz(n=22). In fast-aging mice, 80.5% inter spike intervel(ISI) is longerthan 1sec, but in normal control mice, 95.6% ISI is shorter than 0.5sec. Conclusion The decreased firing rate of hippocampus CA1 and longer ISI observed in the fast-aging mice indicates that fast-aging significantly inhibit hippocampal CA1 neurons excitability.

Objective To investigate the changes of IL-8 in peripheral blood of patients with pustular psoriasis after acitretin treatment.Methods Dual antibody sandwich enzyme-linked immunosorbent assay (ELISA)was performed to measure the IL-8 levels in the peripheral blood of 30 patients with pustular psoriasis and 30 patients with psoriasis vulgaris before and after treatment,and in 30 normal human controls.The relationship between the IL-8 level and disease severity was assessed for patients with pustular psoriasis.Results After acitretin treatment,the condition was improved greatly in patients with pustular psoriasis,together with a significant decrease in the level of IL-8 in the peripheral blood(57.07 ± 12.02 pg/ml vs.96.84 ± 14.68 pg/ml,P ＜ 0.05).Conclusion IL-8 may be involved in the therapeutic mechanism of acitretin in pustular psoriasis.

Objective To explore the changes of intereferon-?(IFN-?)and interleukin-4(IL-4)in peripheral blood of children with mycoplasma pneumoniae(MP) encephalitis at the acute phase.Methods The peripheral blood concentrations of IFN-? and IL-4 were measured by enzyme-linked immunosorbent assay(ELISA) in 24 cases of children with MP encephalitis at the acute stage.The samples from 24 cases of healthy children were control group.Twenty-four children with MP encephalitis were intravenous drip with azithromycin,at the same time,10 cases received hexadecadrol and 15 cases received gamma globulin.Results The serum concentrations of IFN-? and IL-4 in the mycoplasmal encephalitis group were(98.56?12.93) and(45.55?17.58) ng/L,respectively,which were significantly higher than those in control group [(85.35?6.91) and(26.78?9.89) ng/L] respectively(Pa

A total of 62 patients with radical operation of esophageal carcinoma were divided into all-in-one nursing intervention group (research,n =32) and routine nursing group (control,n =30).With regards to postoperative flatus time,removal of chest tube drainage time,postoperative hospital stay and hospital costs,the research group was lower than the control group (P ＜ 0.05).After 2 weeks,from the postoperative quality of life questionnaire with the European Organization for Research and Treatment of Cancer,the scores of overall health of enteral nutrition group were higher than those of parenteral nutrition group while the symptom scores of fatigue,nausea & vomiting,insomnia,decreased appetite,constipation and economic difficulties were less than parenteral nutrition group (P ＜ 0.05).Early postoperative enteral nutrition can improve the quality of life in patients with esophageal cancer.

OBJECTIVE:To compare the acute toxicity of ethanol extract from raw product and different processed products of Wikstroemia indica on mice,and provide basis for optimizing the processing technology of perspiration method for W. indica and medication safety. METHODS:Perspiration method was used to process the W. indica pieces for 30 d to get processed product 1 and process its coarse powder for 14,7 d to get processed product 2,processed product 3,respectively. Then using 70％ ethanol as solvent,percolation method was used to extract the raw W. indica and its different processed products,and acute toxicity test was conducted on mice for different ethanol extracts. RESULTS:The median lethal dose(LD50)of ethanol extracts from raw W. in-dica and processed product 1 were 4.05 and 6.65 g/kg,equivalent to 19,32 times of the clinical daily dose of a 70 kg adult,re-spectively. While the LD50 of ethanol extract from processed product 2 and processed product 3 can not be measured,the maximum tolerated dose(MTD)were measured as 20.0,15.0 g/kg,equivalent to 95,71 times of the clinical daily dose of a 70 kg adult,re-spectively;the maximum dose(MLD)were measured as approximately 30.0,20.0 g/kg,equivalent to 143,95 times of the clini-cal daily dose of a 70 kg adult,respectively. CONCLUSIONS:The toxicity of processed products of W. indica is obviously lower than that of raw products,and its toxicity after processing the coarse powder for 14 d is lower than that after processing the coarse powder for 7 d.