Objective To explore the value of characteristic manifestation of diffusion-weighted images at 3.0T MR system in cer-ebral disease.Methods 120 patients with cerebral disease diagnosed by MR diffusion-weighted images (fat suppression effect,T2 blackout effect,T2 shine-through effect,T2 washout effect)underwent routine MR scan,including echo planar imaging-diffusion weighted imaging (EPI-DWI)and apparent diffusion coefficient (ADC)map,whose characteristic manifestations of DWI were retro-spectively analyzed.Results 1 5 cases of lipoma and 8 cases without fat lesions were diagnosed with fat suppression effect.13 cases of acute cerebral hematoma,1 1 cases of hemorrhagic cerebral infarction and 1 6 cases of micro bleeding of missed diagnosis or small cavernous hemangioma were diagnosed with T2 blackout effect.1 5 cases of epidermoid cyst,5 cases of choroid plexus cyst were di-agnosed with T2 shine-through effect.1 5 cases of posterior reversible encephalopathy syndrome and 22 cases of brain tumor were di-agnosed with T2 washout effect.Conclusion Comprehensive use of the characteristic manifestation of EPI-DWI and ADC map can help the diagnosis of cerebral disease.

Objective To reveal the effects of circadian gene Per2 on growth of human lung cancer cell A549 cell and its mechanism. Methods pcDNA3.1(+)-Per2 was transfected into A549 cells and controlled with the vector pcDNA3.1(+). The expression of Per2 was confirmed with RT-PCR and western blot. The Inhibitory effect of Per2 on cell growth and proliferation was demonstrated with MTT assay and colony-forming assay. Apoptosis was detected with flow cytometry. Results The circadian gene Per2 exhibited a growth-inhibitory and apoptosis-inductory effect on A549 cells. Conclusion The results indicate that Per2 may inhibit A549 cell proliferation,which mechanism might involve cellular apoptosis.

Objective To establish an approach of polymerase chain reaction-sequence special primers(PCR-SSP) to perform polymorphism analysis for multiple genes simultaneously,in order to be used in clinical analysis.Methods The optimized PCR-SSP approach was used to analyze the polymorphism of the following genes:mutation of-308A/G and-238G/A in tumor necrosis factor-?((TNF-?)),-174G/C in interleukin-6(IL-6).Results Polymorphism analysis of multiple genes and many clinical samples could be simultaneously performed with one PCR program,showing clear genotype,quick and accurate genotype.Conclusion The optimized(PCR-SSP) is suitable for polymorphism analysis of the large-sample polygenic mononcleeotide point mutation,and it can be widely applied in clinical test for low cost,quickness and accuracy.

Objective To evaluate the efficiency and safety of hair removal with Lightsheer 800 nm diode laser. Methods Lightsheer, 800 nm diode laser, was used to remove hairs from different areas, including hairlines, lips, whiskers, armpit, chest, back, limbs and bikinis area, in 432 patients. Results At least twice treatments, the maximum 29 times, were needed to achieve satisfactory results. Total effective rate increased with the treatment times but depended on the different area:63.4 % of hairlines, 67.7 % of lips, 71.9 % of whiskers, 100 % of armpit, 100 % of chest, 100 %of back, 82.6 % of limbs and 100 % of bikinis area, respectively. The adverse effect was observed with temporal hypopigmentation in 4 patients and hyperpigmentation in 9 patients, without any scar formation. Conclusions Lightsheer 800 nm diode laser is a safe and efficient method of laser hair removal.

In this paper, a qualitative and quantitative analysis method was established for the scopoletin in herba Artemisiae hedinii hy HPLC. The chromatographic column was Agilent TC-C18 (4.6 mm×250 mm, 5μm);the tem-perature of column was 30℃, eluted with a mobile phase consisted of methanol and 0.3%phosphoric acid solution and gradient elution at a flow rate of 1.0 mL·min-1. The detection wavelength was 344 nm. The results showed that the mass concentration and peak area of scopoletin had a good linear relationship within the range of measurement (r=0.999 9). The reproducibility was good;and the RSD was 1.51%. The average sample recovery rate was 101.42%. It was concluded that the established method was stable, reliable and simple. It provided theoretical evidences for the quality evaluation and quality control of herba A. hedinii.

Objective To study the CT perfusion features of various lymph nodes in the neck.Methods Dynamic perfusion CT scanning was performed in 83 neck lymph nodes proved by pathology,including tuberculosis lymph nodes, lymphoma and metastatic lymph nodes. The shapes, blood flow modes,and perfusion parameters of these lymph nodes were compared among 3 groups. Statistical analysis of L/T and CT perfusion parameters was performed by one-way ANOVA and LSD test. Results The values of MTT of tuberculosis lymph nodes, lymphoma and metastatic lymph nodes were (28. 13 ±5.08), (31.08 ±5.82),and ( 11.24 ±5.31 ) s,respectively. The MTT of metastatic lymph nodes was statistically lower than that of tuberculosis lymph nodes and lymphoma (P ＜ 0. 05). Their frequencies of marginal blood flow were 5/9,4/19, and 39/55 (70. 9% ), respectively. The frequency of marginal blood flow in the tuberculosis lymph nodes and metastatic lymph nodes was statistically higher than that of lymphoma ( P ＜ 0. 05 ). Their frequencies of central blood flow were 2/9, 11/19, and 9/55 (16.4%), respectively. The frequency of central blood flow in the lymphoma was statistically higher than that of tuberculosis lymph nodes and metastatic lymph nodes ( P ＜ 0. 05 ). Their values of L/T were 1.82 ± 0. 32, 1. 80 ± 0. 39, and 1.84 ± 0. 36,(40. 98 ±6. 62) s,respectively. There were no significant differences in L/T, BF, BV and TTP among tuberculosis lymph nodes, lymphoma and metastatic lymph nodes( P ＞ 0. 05 ). Conclusion CT perfusion,especially combination functional imaging with perfusion images may be helpful in judging the nature of neck lymph nodes.

Objective To establish the quantitative transfusion of hemoglobin method and explore the application of this method in neonatal transfusion.Methods This study selected 93 cases of anemic neonates who had no other underlying diseases from the Neonatal Department of Maternal and Child Health (MCH) in Dalian,and they were the principle of weight and age divided into two groups.The first group (control group:conventional method) was transfused and injected the red blood cells that were leukocytereduced,irradiated and washed twice by 0.15 U/kg under the normal reservation.The study measured the hemoglobin value before transfusion and within 24 h after being transfused,and then detected the hemoglobin,volume,and hematocrit of a small amount of blood during the preparation,and finally calculated the utilization rate of hemoglobin in neonates who were transfused.For the second group (observation group:quantitative erythrocyte injection of hemoglobin),it calculated in reverse how much hemoglobin the children needed to be supplemented,based on the doctor's expected hemoglobin values achieved after children being transfused and the utilization rate of hemoglobin obtained from the first group.Then,according to the calculation,it prepared a small amount of blood of the red blood cells that were leukocyte-reduced,irradiated and washed,made the quantitative injection of hemoglobin twice,and measured the hemoglobin value before transfusion and within 24 h after being transfused.At last,it analyzed statistically the results.Results Both two methods effectively improved the children's anemia (P ＜ 0.05).There was no difference (P ＞ 0.05) for two methods in improving the anemia of children,but the quantitative transfusion of hemoglobin (s =6.6,cv =4.6％) could basically reach the doctor's expected hemoglobin value,and it avoided the situations in the first method (s =14.45,vc =8.6％),like that after transfusion a minority of hemoglobin was too high or it did not reach complete amelioration of anemia of the children.Conclusions Both traditional transfusion method and quantitative transfusion of hemoglobin method can improve the anemia of the children,but the latter one is more suitable for the clinical needs and achieves the true quantitative transfusion.

Objective To evaluate the value and the significance of 16-slice spiral computed tomography angiography(MSCTA) in identifying the vertebral artery course variation.Methods MSCTA data in 22 patients with anomalous path of vertebral artery were retrospectively analyzed,13 of them had undergone DSA examinations,and 5 of them had also undergone MRI examinations.Multi-planar reconstruction(MPR),curved MPR,thin-slab maximum intensity projection(MIP),volume rendering(VR) or slab VR(cut-plane VR) were used to assess the anomalous path of the vertebral artery and its relationship with the adjacent large vessels.Virtual endoscopy(VE) was used to evaluate the orifice of the vertebral arteries and its relationship with the aortic arch and the ostia of the adjacent large vessels.Different views of vertebral artery were analyzed on DSA.MSCTA and DSA images were analyzed in blinded fashion for the accuracy of anomalous vertebral artery path and origin detection.Results were compared in a secondary consensus evaluation.Results The anomalous path of the vertebral artery in all 22 patients were correctly displayed on MSCTA,7 of them had anomalous origin of vertebral artery,the anomalous of ostia showed clearly.The vertebral arteriae with course variation were all going up at the front of the foramen transversarium of C6,then bended into the C5,C4 or C3 foramen transversarium.DSA could only be detected the anomalous origin in 13 patients undergone DAS.5 patients indirectly showed having course variation of vertebral artery by MRI.Conclusion MSCTA is superior to DSA in showing the anomalous path and orifice of vertebral artery,it should be considered as a non-invasive imaging tool for these diseases.

Objective:To establish a method of evaluating the reproducibility of the preparation process of Xiaozheng-Zhitong cataplasm. Methods:Used fingerprint spectrum technology and in vitro release test to evaluate the reproducibility preparation process of Xiaozheng-Zhitong cataplasm. By using HPLC to establish the fingerprint of Xiaozheng-Zhitong cataplasm. The chromatographic column was an Agilent HC-C18 column (4.6 mm×250 mm, 5 μm); the detection wavelength was 280 nm; the flow rate was 1 ml/min; the column temperature was 25 ℃. The mobile phase was acetonitrile-0.2% phosphoric acid aqueous solution, used gradient elution method. An HPLC method for the determination of tetrahydropalmatine content was established, and the vertical Franz diffusion cell method was used to investigate its in vitro release. Results:The results showed that the similarity between the 10 batches of Xiaozheng-Zhitong cataplasm and the control map was above 0.95, indicating that the process of Xiaozheng-Zhitong cataplasm was stable and feasible; the cumulative release amount of tetrahydropalmatine was 0.23 mg in 24 hours, and the cumulative release rate in 8 hours was 91.54%, and the RSD of 6 samples at each time point was <3%. Conclusion:The method of evaluating the reproducibility of the preparation process of Xiaozheng-Zhitong cataplasm was established by using fingerprint technology and in vitro release; it can provide a reference and scientific basis for the evaluation of the reproducibility of the preparation process of the plaster.

Objective To investigate the distribution of water fluoride and the status of water-improving defluoridation projects,thus to explore the condition of endemic fluorosis in Guangxi Province.Methods According to"The National Technical Scheme for Endemic Disease Contml in 2005",the fuorine content in water Was determined by F-ion selective electrode,children's dental fluorosis was checked by Dean method.and the skeletal fluorosis was checked by the standard of clinical scale of skeletal fluorosis.Results 305 water samples in 61 villages were examined,among which 71 waters were exceeded the standard,accounting for 23.28%(71/305).The projects of defluoriding drinking water were running well except one was discarded.The prevalence of dental fluorosis was 13.55%(356/2627),the prevalence of skeletal fluorosis was 4.02%(65/1615).Conclusions The situation of endemic fluorosis control is not optimistic in Guangxi,which needs fuaher prevention and controls.