Objective To study the image quality control system to ensure that equipment meet clinical needs.Methods It was scanning the Catphan504 phantom with models of high quality head,standard dose head and pelvis,we could get the results of CT numbers linearity,uniformity,spatial resolution,contrast resolution.Using T test to compare different scanning technique results.Results The standard dose head scanning technique was better than the pelvis scanning technique in CT numbers linearity test,and gets the best result in uniformity test.The result of CT numbers uniformity was higher in the standard dose head scanning than the high quality head and the pelvis scanning (9.7 ±3.9 vs.17.9 ±5.3,P =0.00 and 9.5 ± 4.0 vs.31.1 ± 5.7,P =0.00).The result of contrast resolution was higher in the pelvis scanning than the high quality head and the pelvis scanning (5.6 ± 0.1 vs.1.3 ± 0.5,P =0.00 and 6.0 ± 1.0 vs.1.3 ± 0.5,P =0.00).The result of spatial linear distance was very accurate,the range was 4.98 -5.06 cm.Conclusions The results of spatial linearity test are stable and accuracy,but CT numbers linearity and uniformity test are affected by the scanning technique significantly for device.To spatial resolution test and contrast resolution test,we need to set the standard and tolerance according to each linear accelerator specialty.

ObjectiveTo study infection status of voluntary blood donors and epidemic trends of related infectious diseases in Bengbu area.MethodsBlood infection markers(ALT, HBsAg,Anti-HCV,TP and Anti-HIV) of 130 118 voluntary blood donors were detected.Voluntary blood donors were divided into college students group,reservation group and street group.Then, the positive rates of blood infection markers of three groups were compared.ResultsAccounting for 4.41％ ,5 748 voluntary donors of 130 118 volunteers were unqualified.The positive infection rates of students group, reservation group and street group were 2.42％, 4.08％ and 4.85％.The statistical differences of ALT and anti-HCV among these groups were significant (x2 = 35.07,12.31,12.45,116.49, all P ＜0.01),and no statistical significance was found in ALT difference among these groups(x2 = 3.82,0.59, all P ＞0.05).ConclusionThe infection rates of these blood donation related diseases of voluntary donors in bengbu aera showed increasing tendency, and that of college students in bengbu area was relatively lower.

Background Peroxisome proliferator-activated receptor gamma (PPARγ) is one of nuclear transcription factors.It plays potential anti-inflammation,anti-fibrogenesis,anti-angiogenesis and neuroprotection roles in human.So the study of its physiological and pathological function in human and animals is still a focus.To understand the distribution of PPARγ in ocular tissues is important for the target treatment of eye diseases.Objective Current study was to investigate the expression of PPARγ in different parts of eye in rodent.Methods Cornea,lens,ciliary,retina and optical nerve were isolated from 6 SPF C57BL/6J mice and 1 SD rat.Western blot assay was used to detect the expressions of PPARγprotein in cornea,lens and retina.Immunohistochemistry was used to locate the distribution of PPARγ protein in cornea,lens,ciliary,retina and optical nerve.Also,the co-expression of PPARγ with glutamine synthetase (GS) (a Müller cell specific marker) and glial fibrillary acidic protein (GFAP)(an astrocyte specific marker) in retina and optic nerve was detected by immunofluorescent double staining.Results Western blot assay showed that PPARγ was expressed in the cornea,lens and retina of the mice.Immunohistochemistry revealed that PPARγ mainly located at corneal epithelium with the strongest staining in the basal cells,but only weak staining was seen in corneal endothelial cells and stroma cells.PPARγ was strongly expressed in epithelial cells and shallow cortex layer of mouse lens.In mouse retina,PPARγ was extensively and richly expressed in retinal ganglion cell layer,inner and outer plexiform layers and inner nuclear layer.In addition,PPARγ was also expressed in the non-pigmented epithelial cells in ciliary body.The co-locations of PPARγexpression with GS in retinal tissue and PPARγ expression with GFAP in optical nerve tissue were found in the mice.Conclusions PPARγis proved to distribute extensively in different ocular tissues.These results offer basis for the target treatment of relevant eye diseases.

Objective Performing a daily quality assure (QA) program to get variation and error range of on board imager (OBI) system,so that the OBI system can meet the needs of clinical treatment.Methods The daily QA program including: mechanical accuracy,2D/2D Shift calculations accuracy,couch motion accuracy.Results The max deviation was-0.7 mm in lcft-right (LR) dircction and 0.8 mm in superior-inferior (S1) direction in Linac& OBI isocenter accuracy check.The max deviations in 4 blades (x1,x2,y2,y1) position accuracy check were:-2.1 mm,2.2 mm,± 1.7 mm,-2.1 mm.In OBI mechanical arms position accuracy check,31％ standard data was 85.2 cm with 0 mm deviation; 69％ standard data was 85.1 cm with 1 mm deviation.In LR,SI and anterior-posterior direction,2D/2D shift calculations accuracy was 0.46 mm,1.35 mm,-0.04 mm and couch motion accuracy was-0.1 mm,0.3 mm,0.2 mm,respectively.Conclusions By performing the daily QA program,it could be found whether OBI works properly and satisfies the clinical use.The physicist can pay more attention to the parameters which change frequently,and adjust the frequency of the parameters which are stable,so that working efficiently.

yggG, a Era-binding protein gene, was isolated and cloned from the E.coli genomic DNA library. Previous studies indicated that the product of yggG gene, YggG294(amino acids 1-294), strongly inhibited the growth of host bacteria and caused the death of bacteria cells. To elucidate whether Era is related to the death of bacterial cells expressed YggG294,A double promoter expression vector that can express YggG294 and Era proteins controllably in cells was constructed. Using this vector to express YggG294 and Era protein in the same E.coli cells, then analyzed the relation between YggG294 and Era. The results showed that the ratio of Era proteins to total proteins increased with the increase of induction time in E.coli cells without YggG294 expression and with little YggG294 expression;the ratio of Era proteins to total proteins seemed to be a constant level in E.coli cells overexpressing YggG294;but we could not detect any Era hydrolyzate in E.coli cells overexpressed YggG294 could not be detected. The results also showed that pre-expression of Era protein did not produce any effect on the growth inhibition of E.coli cells caused by YggG294. These results indicate that YggG294 can not hydrolyze Era protein in E.coli cells, and that YggG-Era interaction is not associated with the death of bacteria expressed YggG294. It is thus reasonable to draw a conclusion that Era is not associated with the growth inhibition of E.coli cells caused by YggG294. YggG294 inhibits the growth of bacteria by other way.

Objectlve investigate the role of Toll-like receptor 2 (TLR2) on polymorphonuclear neutrophil (PMN) during perioperative period in the development of postoperative systemic inflammatory response syndrome (SIRS) in patients undergoing orthotopic liver transplantation (OLT).Methods Twenty patients (18 male and 2 female, aged 33-58 yr and weighing 52-73 kg) with ASA Ⅲ or Ⅳ (NYHA Ⅱ or Ⅲ )undergoing OLT were studied. Blood samples were collected from the central vein for determination of TLR2 expression on PMN and plasma TNF-α, IL-1β and IL-8 concentrations before induction of anesthesia (T1, baseline), at 25 min of anhepatic phase (T2), 3 h (T3) and 24 h after beginning of reperfusion of the allograft (T4). The expression of TLR2 was measured by flow cytometry and the serum concentrations of TNF-α, IL-1β and IL-8 were measured by enzyme linked immunosorbant assay (ELISA). The patients were divided into SIRS and non-SIRS group depending on whether the patients developed SIRS or not within 7 days after operation. The diagnosis of SIRS was based on the criteria laid down by ACCP and SCCM in 1992.Results Ten patients developed SIRS within 7 days after operation. There was no significant difference in Child-Turcotte-Pugh (CTP) scores between the two groups. Compared with non-SIRS group, the TLR2 expression on PMN and the serum IL-1β concentration were significantly increased at T4 and the serum IL-8 concentration was significantly increased at T3 in SIRS group.There was positive correlation between serum TNF-α concentration and TLR2 expression on PMN in SIRS group ( r= 0.607, P ＜0.05).Conclusion The expression of TLR2 on PMN increases significantly at 24 h after beginning of reperfusion of allograft and may play an important role in the development of postoperative SIRS.

Background The pathogenesis of primary open angle glaucoma(POAG) and high myopia are very complex.To construct the regulatory network of virulence genes and relevant genes that involved in pathogenicity are helpful for reveal of the pathogenesis.Objective The aim of this study was to investigate myocilin(Myoc),a gene that contributes to POAG and high myopia in eyes of BXD Recombinant Inbred(BXD RI)mice and construct the regulatory network of Myoc.Methods The affymetrix microarray system was used to detect the differential expression of Myoc in the eyes of C57BL/6J(B6),DBA/2J(D2) and BXD RI mice.Expression quantitative trait loci (eQTL) mapping was performed to construct the regulatory network of Myoc gene.Results The average expression level of the Myoc gene in the BXD strains was 10.83,and the gene exhibited expression levels ranging from 8.39 in BXD55 mice tol 1.43 in B6 mice.The eQTL mapping for the Myoc gene showed a significant likelihood ratio statistic (LRS) of 21.78.The QTL was mapped in chromosome 2,and Myoc was located on chromosome 1,indicating that the Myoc gene was a trans-acting QTL.Olfml2a was identified to be a candidate upstream gene of Myoc by analysis of bioinformatics.Genetic regulatory network analysis demonstrated that a series of genes associated with Myoc probably played roles in the pathogenesis and development of POAG and high myopia.Conclusions The genetical genomics approach provides a powerful tool for constructing pathways that contribute to complex traits,such as POAG and high myopia.

Objective: To evaluate the effect and safety of an anti-IL-8 monoclonal antibody cream for the treatment psoriasis vulgaris. Methods: Eight-four patients with psoriasis vulgaris were treated with the anti-IL-8 monoclonal antibody cream for 8 weeks,the safety and effect were evaluated by analyzing the adverse action and the changing of the diameter,color,thickness,scales of the lesions. Results: After the treatments for 8 weeks,11 patients were cured,41 patients were remarkably improved,the cure rate and effective rate is 13.1% and 61.9%,respectively.Among them the cure rate of guttate type and effective rate of mixed type were the highest,while the cure rate and effective rate for aggressive stage were both higher than those of stable stage.And only one patient had mild local adverse action. Conclusion: The anti-IL-8 monoclonal antibody cream was effective and safe for the treatment of psoriasis vulgaris.

Background and purpose: Sorafenib hepatocellular carcinoma assessment randomized protocol (SHARP) and sorafenib in patients in Asia-Pacific region with hepatocellular carcinoma (ORIENTAL) had indicated that multi-kinase inhibitor sorafenib could prolong overall survival (OS) and time to progression (TTP) as well as improve progress free survival (PFS) in patients with advanced stage hepatocellular carcinoma. Drug-related adverse events in the course of treatment restricted its clinical application to a certain degree. This study was aimed to summerize the adverse events as well as the management of sorafenib in our clinic. Methods: Twenty-five cases clinically diagnosed as advanced hepatocellular carcinoma were enrolled from January 2008 to October 2009. All the patients who received sorafenib treatment met inclusion criteria as followed: (1) Progression of disease after trans-hepatic arterial chemoembolization therapy; (2) Extensive portal vein cancerous thrombus formation; (3) Portal zone or retroperitoneal lymph node metastasis or multiple remote metastasis, such as lung or bone; (4) Diffused poor blood supply to tumor; (5) Inform consent was obtained. All adverse events with different grade were observed during the beginning 12 weeks, and clinical treatment were carried out relatively. Results: Total of 25 cases were enrolled. Nine patients died of the disease, 3 of them died during the first 12 weeks, 3 patients abandoned sorafenib treatment, among them 2 died before the finish of 12 weeks treatment and 1 patient discontinued 5 months after the sorafenib treatment. Twenty cases finally assigned. Number of patients encountered drug-related adverse events were: HFSR (hand-foot-skin-reaction) 4(4/20), diarrhea 4(4/20), alopecia 5(5/20), rasb 4(4/20), fatigue 8(8/20), leukopenia and Thrombocytopenia 4(4/20), elevated blood pressure 1(1/20) and abdominal pain 1(1/20). After clinical management, 20 patients' sorafenib treatment were eventually not affected by adverse events. Conclusion: Sorafenib was well-tolerated and is a safe option of treatment for patients with advanced hepatocellular carcinoma.

The event-related potential (ERP) is considered as one of the most effective methods to study and analyze objectively human mental activity based on nerve electrophysiology. At present, ERP is not only used in the study of lie detection, but also in the clinical medicine for the cognitive assessment on patients with cerebrovascular disease, dementia or traumatic brain injury and auxiliary diagnosis of mental illness. With the further development of ERP detection technology, it would have a wider application prospect in the field of forensic medicine.
Evoked Potentials/physiology* ; Forensic Medicine/trends* ; Humans