Objective To determine the accuracy and radiation dose of dual-energy computed tomography (CT) in evaluating solitary pulmonary nodules (SPNs) by virtual non-enhanced images.MethodsSixty-one patients with SPNs including 39 malignant and 18 benign nodules proved by pathology underwent DECT scans. The CT values of SPNs on enhanced weighted average and virtual non-enhanced images were compared by using Liver VNC processing unit in terms of their diagnostic accuracy for distinguishing malignant and benign nodules with a 20 HU threshold. Diagnostic accuracy was compared. In 28 patients of all patients, image noise and quality score of the non-enhanced and virtual non-enhanced images were compared, and radiation doses of each patient were recorded. The paired t test was used to analyze the noise difference between the plain scan and virtual non-enhanced scan. The Mann-Whitney U test was used to analyze statistically significant differences of the image quality score and radiation dose between the non-enhanced scan and virtual non-enhanced scan. ResultsThe sensitivity, specificity and accuracy for distinguishing benign and malignant nodules by using the virtual non-enhanced image of were 89. 7％(35/39), 72.2％ (13/18), 84.2％ (48/57)respectively.The noise of common CT and virtual nonenhanced images were(8. 49 ± 1. 94) HU and( 10. 14 ± 2. 18 ) HU, and there were statistically difference (t＝9.45,P＜0. 01 ). The quality scores of common CT and virtual non-enhanced images were (4.71 ±0. 46 ) and ( 4.42 ± 0. 57 ), and there were no statistical difference ( U ＝ 290. 00, P ＞ 0. 05 ). The radiation doses of common CT and DECT were ( 3. 72 ± 0. 48 ) mSv and ( 3.78 ± 0. 45 ) mSv, and there were no statistical difference ( U ＝ 350. 50,P ＞ 0. 05 ). ConclusionDECT by using virtual non-enhanced images is useful tool to distinguish the benign and malignant SPN without additional radiation dose.

BACKGROUND:The traditional orthopedic fixation by C-arm positioning surface is completed, but the large C-arm injury on the human body and the long fixed time increase the suffering of patients. OBJECTIVE:To investigate the X-ray fixed in position within the orthopedic implants, navigation and effect. METHODS:Twenty-six New Zealand white rabbits were randomly divided into C-arm machine group and X-ray group, with 13 in each group. Rabbits in both groups were used to simulate soft tissue foreign body localization, intramedul ary nail implantation at distal fracture end and spinal pedicle screw entry point position. In the C-arm machine group, positioning navigation was conducted with C-arm machine. In the X-ray group, X-ray positioning navigation was used. The positioning and navigation effects were compared between the two groups. RESULTS AND CONCLUSION:(1) Compared with the C-arm machine group, the time required for navigation in the X-ray group targeting soft tissue foreign body localization, fracture distal locking intramedul ary nail implantation and pedicle screw spinal needle point location was significantly shorter (P<0.05);navigation displacement and deviation produced were significantly less (P<0.05). (2) These findings suggested that the X-ray positioning for orthopedic fixation method is relatively simple, with high availability, and can obtain a high performance-price ratio. Meanwhile, the X-ray localization can improve accuracy and shorten the fixed time.

Celecoxib ; Cell Proliferation ; drug effects ; Drug Resistance, Multiple ; Humans ; Interferon-alpha ; pharmacology ; K562 Cells ; Pyrazoles ; pharmacology ; Sulfonamides ; pharmacology

Through a series of chemical reactions, a kind of quaternary ammonium salt derivative of nanodiamond, ND-CO-NH-CH2-CH2-N ( CH3 ) 3+· I-( QAS-ND ) , was obtained , which was confirmed by FTIR, element analysis experiment and the electrochemistry measurements. Mixed myoglobin ( Mb) and QAS-ND solution was dropped on the surface of the glassy carbon ( GC ) electrode to prepare QAS-ND/Mb/GC modified electrode. In 0. 1 mol/L phosphate buffer solution (PBS) (pH 7. 0), Mb in the membrane exhibited direct electrochemical properties and showed good stability. The electrocatalytic property of the modified electrode toward H2 O2 was investigated, the results showed that the modified electrode could be used as the H2O2 biosensor to achieve fast, accurate detection of H2O2, with a detection limit of 3. 5 mmol/L (S/N=3).

Kazakh of Xinjiang is the region with a high incidence of esophageal cancer,genetic research is quite active in recent years.Through the research on biological activity of P53,RB gene during esophageal cancer process.We tried to find potential differences in the national heredity susceptibility and so to support treatment and the research.

Objective Promote the use of medical record information, the depth of excavation,provide strong support for clinical research and hospital management.Methods Medical Record Information lower utilization reasons put forward need to build the whole structure of the paperless electronic medical records, electronic medical records for research concluded that the key to building elements to provide support.Results Pointed out that the construction of paperless electronic medical records from the storage structure of the building medical record systems, and data warehouse technology combined start, outpatient and inpatient medical records while achieving interoperability, building regional health care, improve follow-up system, and finally pointed out the key technical implementation.Conclusions It is to promote the utilization of medical records, medical records for research to improve support efforts to promote development and progress of medicine and enhance the hospital's soft power has great significance.

Objective Improve the level of education of medical information to promote faster and better development of medical information.Methods According to the disciplinary development lag,weak teachers' drawbacks of medical education and medical information technology status quo,research talent development solutions.Results Departure from the practice of medical information is proposed to establish and improve the incentive mechanism,curriculum system and teaching content changes,the establishment of hospital information system simulation laboratory recommendations.Conclusion For the development and maturation of the education of medical information,to promote the cultivation of medical information,certain referential significance.

Objective To investigate the correlation of dynamic contrast-enhanced (DCE) MRI features with microvessel density (MVD) and vascular endothelial growth factor (VEGF) in non-small cell lung cancer(NSCLC).Methods Conventional MR imaging and dynamic contrast-enhanced scan in thirty-three patients with NSCLC confirmed by pathologyn were performed. MVD and VEGF were stained with immuno-histochemical technique in all cases. Some parameters of DCE MRI, including maximum slope(Smax) and time to peak(TTP) were put more analysis. The relationship between the results of DCE MRI (Smax and TTP) and that of immuno-histochemistry (MVD and VEGF) was analysed.Results The Smax of adeno carcinoma was higher than that of squamous cell carcinoma,but TTP was lower. The difference was obvious difference(t=3.22,P

Objective To investigate the plastic surgery of facial soft tissue for improvement of facial contour. Methods Botulinum toxin type A was injected into hypertrophied masseter to make it atrophy and attenuation; meanwhile, buccal fat lining was partly resected by intra-oral approach. Buc-cal liposuction was performed if necessary. Results 36 cases got satisfactory face thinning results af-ter treatment. The facial contour of all patients was markedly improved. Following up for 6 - 12 months showed that the effect was stable. Conclusion Plastic repair of facial soft tissue for improve-ment of facial contour is a simple approach, with mild injury, quick recovery, safe and effective.

Objective To investigate the possible effects and underlying mechanisms of desferroxamine (DFO) preconditioning against hypoxia in neurons. Methods Cortical neurons were cultured in DFO under ischemia condition of oxygen-glucose deprivation (OGD). Cell viability was determined by cell counting kit-8 (CCK-8) method; apoptotic cell ratio was examined with Hoechst 33342 staining; the morphological change was observed. Middle cerebral artery was occluded with or without DFO administration to establish the cerebral ischemia rat model. Infarct sizes were examined by TIC staining, and the neurological severity score was evaluated. Meanwhile immunofluorescent staining was employed to detect the protein synthesis of hypoxia inducible factor-1 (HIF-1) and erythropoietin (EPO), RT-PCR was performed to detect the mRNA expression of HIF-1 and EPO as well Results Neuronal viability kept in 49% (OGD group was 25%, t =8. 544, P<0. 05), the rate of apoptosis was 38% (OGD group was 30%, t = 4. 409, P <0.05 ) after administration of DFO (post-DFO) , the morphology of neurons improved. In the model of focal cerebral ischenfia of 30 mg/kg group, neurological severity score was reduced, the percentage of brain infarct decreased 8.5% (t=4.649, P<0.05) 3 days post-DFO(vs control). In the 100 mg/kg group, neurological severity score was 7.44 ±0.39 (t=2.903, P<0.05 ) ,5.60±0.47 (t=10.143, P < 0.01 ) ,6.97 ±0.73 (t=3.142, P<0.05 ), the percentage of brain infarct decreased 12. 0% (t=5.056, P<0.05), 32.3% (t =10.993, P<0.01), 10.6% (t =4.385, P<0.05)2,3 and7 days post-DFO(vs control), respectively. Immunofluorescent staining found synthesis of HIF-1α and EPO in cultured cortex neurons after DFO pretreated; HIF-1α and EPO were upregulated in the neurons of rat brain after DFO pretreated. The mRNA of HIF-1α and EPO upregulated in vivo and in vitro. Conclusion DFO preconditioning can protect the brain against ischemic damage, which is related to the protective effect on neurons. The mechanism of DFO preconditioning may be involved in the expression of HIF-1α and EPO in vivo and in vitro.