Neuronal nicotinic acetylcholine receptors (nAChRs) are involved in a spectrum of cognitive functions and related to some psychiatric and neurodegenerative disorders such as AD,PD,autosomal dominant nocturnal frontal lobe epilepsy and schizophrenia.Nuclear medicine imaging of neuronal nAChRs in living human is a relatively new field.Halogenated analogs of 3 (2 (S)-2-azetidinylmethoxy) pyridine (A-85380) are the most widely used brain imaging radiotracers.In this review,the progress on the latest research on SPECT and PET using the analogs of A-85380 is summarized.

Objective To investigate the current prevalent status of endemic fluorosis in the alluvial plain area of the Yellow River in Shandong Province,in order to provide a scientific basis for developing control measures against the disease.Methods Six counties were selected as survey counties by random sampling,ten improvedwater projects were selected in each survey county,for the projects,the operating effect was investigated and water fluoride content was tested;three epidemic villages were chosen as survey villages in each county,the operating condition and the fluoride level of water were investigated in the villages with water improvement projects.Dental fluorosis of children aged 8 to 12 was surveyed,the urinary fluoride and skeletal fluorosis X-ray diagnosis were checked of adults over the age of 25.Water fluoride and urinary fluoride contents were detected via the F-ion selective electrode method,and the prevalence of dental fluorosis of all children aged 8 to 12 was diagnosed based on Clinical Diagnostic Criteria of Dental Fluorosis (WS/T 208-2011),skeletal fluorosis X-ray diagnosis was done based on the National Standard for Diagnosis of Endemic Skeletal Fluorosis (WS 192-2008).Results ①In the six counties,58 improved-water defluoridation projects were investigated,all projects were operated normally,the qualified rate of water fluoride content was 44.83％ (26/58).②A total of 19 villages that had water-improving and defluoridation projects were investigated,and all projects were operated normally,the qualified rate of water fluoride content was 42.11％ (8/19).③The overall rate of dental fluorosis among children aged 8 to 12 years old was 49.28％ (480/974),with the index of dental fluorosis as 1.01 in 19 villages,the prevalence of dental fluorosis was mild.In the qualified villages of water fluoride concentration,the positive rate of dental fluomsis among children aged 8 to 12 was 33.41％ (148/443),dental fluorosis index was 0.65,and the prevalence of dental fluorosis was extremely low;in the exceeding-standard villages of water fluoride content,the positive rate of dental fluorosis among children aged 8 to 12 was 62.52％ (332/531),dental fluorosis index was 1.36,and the prevalence of dental fluorosis was mild;the detection rate of dental fluorosis among children aged 8 to 12 of the villages with qualified fluoride content was lower than the rate of the villages with excessive fluoride (x2 =81.91,P ＜ 0.01).④X-ray detection rate of skeletal fluorosis in adults over the age of 25 was 6.14％ (53/863) in 17 villages,there was no statistically significant difference between the qualified villages and the exceeding-standard villages of water fluoride concentration (x2 =1.55,P ＞ 0.05),X-ray detection rate of skeletal fluorosis in adults was 5.04％ (20/397) and 7.08％ (33/466),respectively.In the qualified villages and the exceeding-standard villages of water fluoride,urinary fluoride geometric average and the exceeding rate of urinary fluoride were 1.50 mg/L,44.16％ (170/385) and 2.09 mg/L,62.58％ (286/466),respectively.In the qualified villages of water fluoride,the exceeding rate of adult urinary fluoride was lower than that in the exceeding-standard villages (x2 =28.58,P ＜ 0.01).Conclusions The prevention and control measures on endemic fluorosis have had some effects in the alluvial plain area of the Yellow River in Shandong Province.But the water fluoride content of water improving defluoridation projects still exceeds the national standard seriously,and endemic fluorosis has not been effectively controlled.Prevention measures should be further strengthened.

Objective To study the prevalence of drinking water type of endemic fluorosis in Shandong Province,and to provide a scientific basis in making strategies for prevention and control of the disease.Methods Ten counties (cities,districts) were selected by random number table method to carry out the epidemiological study,and to study the progress and effect of water-improving and defluoridation projects.Three villages in each county (city,district) were chosen to determine fluoride content of drinking water and to check the prevalence of dental fluorosis of children 8 to 12 years old.Water fluoride content was determined with fluoride ion-selective electrode,and dental fluorosis was diagnosed by the Deans method.Results In the 10 counties (cities,districts),a total of 515 water-improving and defluoridation projects were built covering 3 207 fluorosis villages,and the waterimproving rate was 81.71％ (3 207/3 925).A total of 85 water-improving and defluoridation projects were investigated in the 10 counties (cities,districts),and all of the projects were operating normally.The number of projects that water fluoride concentration ≤ 1.20 mg/L was 51; the qualified rate of water fluoride concentration was 60.00％ (51/85),and the maximum value of water fluoride was 4.38 mg/L.A total of 29 villages that had waterimproving and defluoridation projects were investigated in the 10 counties (cities,districts),and the number of villages that mean of water fluoride ≤ 1.20 mg/L was 21,accounting for 72.41％ (21/29); ＞ 1.20 mg/L was 8,accounting for 27.59％ (8/29),and the maximum value of water fluoride was 4.02 mg/L.In the 21 qualified villages of water fluoride concentration,a total of 1 023 children aged 8 to 12 were examined; the positive rate of dental fluorosis was 38.12％ (390/1 023); dental fluorosis index was 0.67,and the prevalence of dental fluorosis was extremely low.In the 8 exceeding-standard villages of water fluoride content,a total of 449 children aged 8 to 12 were examined; the positive rate of dental fluorosis was 54.79％ (246/449); dental fluorosis index was 1.18,and the prevalence of dental fluorosis was mild.Conclusion In Shandong Province,the water fluoride content of waterimproving and defluoridation projects exceeds the national standard seriously,and the condition of children's dental fluorosis is still serious,and the measures of water-defluoridation should be further strengthened.

Objective To understand the status of endemic fluorosis in Shandong Province.Methods In accordance with the requirements of the National Surveillance Scheme of Drinking-Water-Type Endemic Fluorosis (Trial) and Shandong Provincial Surveillance Scheme of Drinking-Water-Type Endemic Fluorosis (Trial),ten counties (cities,districts) were chosen in the province,and ten water-improvement projects were selected in each county (city,district).The operating effect of water-improvement projects was investigated; one peripheral water sample of each project was collected,and water fluoride content was tested.Three epidemic villages were chosen as fixed monitoring villages in each county (city,district).In the villages that had changed water source,one peripheral water sample was collected; in unchanged water source villages,one water sample was collected following five different directions of the east,the west,the south,the north and the center of the water source location; and the water fluoride content was tested.All students aged 8 to 12 were checked for dental fluorosis in the monitoring villages.The fluoride content in drinking water was detected by fluoride ion selective electrode method,and dental fluorosis was diagnosed by Dean's method.Results ① In the 10 counties (cities,districts),a total of 85 water-improving projects were monitored,and all the projects were in normal operation; the water fluoride contents of 47 projects were qualified,and the qualified rate of water fluoride content was 55.29％(47/85),with the maximum of water fluoride content was 4.74 mg/L.② In the 30 fixed monitoring villages,27 monitored villages had water-improving projects; water fluoride contents of 19 villages were qualified,the qualified rate of water fluoride content was 70.37％ (19/27),with the maximum of water fluoride content was 4.77 mg/L.In the 3 monitored villages without water-improving projects,villages of mean water fluoride contents ≤ 1.20 mg/L and ＞ 1.20 mg/L were two and one,respectively,with the maximum of water fluoride content was 1.55 mg/L.③ In the 19 monitored villages with water-improving projects that in normal operating condition with qualified water fluoride content,the detected rates of dental fluorosis and the defect type of dental fluorosis among children aged 8 to 12 years old were 52.37％(508/970) and 6.39％(62/970),respectively,and the index of dental fluorosis was 1.02.In the 8 monitored villages with water-improving projects that in normal operating condition with water fluoride content that exceeded the national standard,the detected rates of dental fluorosis and the defect type of dental fluorosis were 62.39％ (297/476) and 8.82％ (42/476),respectively,and the index of dental fluorosis was 1.67.In the 3 monitored villages without water-improving projects,the detected rates of dental fluorosis and the defect type of dental fluorosis were 49.45％ (90/182) and 7.14％ (13/182),respectively,and the index of dental fluorosis was 1.25.Conclusions In Shandong Province,the water fluoride content of water-improving defluoridation projects exceeds the national standard seriously,and water quality of the projects still need to be further improved.The projects of water-improving defluoridation play a certain role in control of dental fluorosis condition,but the condition of children' s dental fluorosis is still very serious.So preventive and control measures for endemic fluorosis should be further strengthened.

Objective　To study the value of renal CT scan in evaluating split renal function.Methods　147 patients undergone CT scan from June 2009 to June 2011 were involved in this study.There were 73 cases of obstructive hydronephrosis and 74 cases of renal tumors.66 patients were males and 81 were females with a mean age of 53 years ( range 17 - 87 years).GFR detected by single-photon emission computed tomography (SPECT) was used as the reference of split renal function.The kidneys were divided into 3 groups according to the GFR:normal renal function (113 cases,GFR ≥ 34 ml/min),mildly impaired renal function (66 cases,GFR:20 -34 ml/min) and severely impaired renal function (41 cases,GFR ＜20 ml/min).One-way ANOVA and linear regression analysis were used to analyze the relationship between the results of CT scan and split renal functions.　Results　There were significant differences in the cortical thickness among the normal renal function,mildly impaired renal function and severely impaired renal function groups.The cortical thicknesses were (0.62 ±0.11) cm,(0.45 ±0.10) cm and (0.26 ±0.07) cm,respectively (P ＜ 0.01 ).The renal cortical thickness was strongly correlated with GFR (r =0.806,P ＜0.01 ).There were significant differences in the enhancement during the cortical phase among the 3 groups,which were (162.1 ±25.3) HU,(121.6 ±21.0) HU and (63.5 ±20.0) HU,respectively (P＜0.01).The enhancement during the cortical phase was strongly correlated with the GFR (r =0.851,P ＜ 0.01 ).The enhancement during the parenchymal phase and excretory phase was moderately correlated with the GFR ( r =0.467 and r =0.451,P ＜ 0.01 ).　Conclusions　The renal cortical tbickness and the enhancement during the cortical phase detected by CT scan might be useful for the clinical evaluation of split renal function.

Objective To understand the status quo of the illness situation and the implementation of prevention and control measures on Kashin-Beck disease( KBD ) in Shandong Province , and provide a scientific basis for assessment and acceptance of the work on eliminating KBD. Methods In accordance with the requirements of the national “Implementation Scheme for Endemic Disease Control in 2012” and the “Shandong Provincial Technical Scheme for KBD Control in 2012”. In four towns of Qingzhou, three epidemic villages were selected as the surveying villages in each town in order to understand the implementation of measures for prevention and control of KBD; information such as population of investigating villages, per capita income, farming, food and the implementation of control measures,etc were included. In each investigating village, 7 - 12 years old children were selected to receive clinical and X-ray examination. When fewer than 50 people in a investigating village , one additional endemic village was included near the investigating village , and all children aged 7 to 12 of the village were checked. The number of cases of clinical degree Ⅰ, Ⅱ, Ⅲand the detection rates, X-ray positive detection rate, the number of cases of metaphysis, epiphysis, distal end of phalanx, carpal bone, triad and the detection rates were calculated, respectively. Clinical and X-ray diagnosis were based on “The Diagnostic Criteria of Kaschin-Beck disease”(WS/T 207-2010). Results A total of 14 epidemic villages were selected to survey in four towns of Qingzhou. In the recent three years in the epidemic areas, measures of supplying Se had not been implemented;measures of resettlement and off-site education had not been implemented either. In the epidemic areas , the main crops were wheat and corn; the staple food was flour which accounted for more than 80%, and the foreign food bought accounted for only 11%. The areas of returning farmland to forest (grass) accounted for 0.32%(36/11 151) of the original arable land, and the areas of replanting economic crops accounted for 1.17%(131/11 151) of the original farmland. A total of 536 children aged 7 to 12 were examined by clinical and X-rays. Patient of KBD was not detected clinically. Six positive patients with metaphyseal changes of KBD were detected by X-rays, and the average X-ray detection rate was 1.12%(6/536). Patients with abnormal epiphysis, distal end of phalanx and carpal bone were not detected by X-rays. Conclusions KBD in Shandong Province has been effectively controlled. Since the cause of KBD is still unknown, it is necessary to build a sustainable long-term control mechanism of KBD;further improve the monitoring system and dynamic monitoring work still need to be strengthened.

Objective To understand the schedule and effectiveness of water-improving defluoridation projects comprehensively of control of fluorosis in drinking-water-borne endemic fluorosis areas in Shandong Province,and to provide a scientific basis for making strategies for prevention and control of the disease.Methods In accordance with the requirements of Shandong Provincial Survey Scheme for Implementation of Prevention and Control Measures of Endemic Fluorosis,the progress of water-improving defluoridation projects was investigated in Shandong Province.The types of water source,scale and operating conditions for water-improving defluoridation projects in 17 cities of the province were investigated.Water fluoride contents of the normal operating projects were detected by F-ion selective electrode.Results ① By the end of 2012,a total of 3 539 water-improving defluoridation projects were built that covered 9 856 fluorosis villages,113 counties,17 cities in the province,and the water-improving rate was 91.01％ (9 856/10 830).The type of water source of water-improving project was mainly groundwater,accounted for 93.78％ (3 319/3 539) of the total projects.As for the scale of the water-improving projects,small centralized water supply projects were the main projects,accounted for 92.96％(3 290/3 539) of the total projects.\)Of all the water-improving defluoridation projects,normal operating projects accounted for 89.12％(3 154/3 539),intermittent and scrapped projects accounted for 3.25％(115/3 539) and 7.63％ (270/3 539),respectively.③Among normal operating projects,the number of projects with water fluoride content ≤ 1.20 mg/L was 1 925,accounted for 72.40％(1 925/2 659).The number of projects with water fluoride content ＞ 1.20 mg/L was 734,accounted for 27.60％ (734/2 659); among them water fluoride contents between 2.01-4.00 mg/L and ＞ 4.00 mg/L were 233 and 65,respectively,and the highest water fluoride value was 9.71 mg/L.Conclusions The progress of water-improving projects in some cities (counties) of Shandong Province is still slow.Some of the water-improving projects can not be operated normally or have been scrapped,and water fluoride content has exceeded the standard seriously.So the prevention and control measures need to be further strengthened,funding should be increased,and the operating conditions and water quality of the water-improving defluoridation projects in Shandong need to be further improved.

Objective:To observe the changes of macular visual function after myopic foveoschisis (MF) and pars plana vitrectomy (PPV) combined with internal limiting membrane peeling and air filling.Methods:A single-center, retrospective study. From October 2018 to October 2019, 29 MF inpatients (32 eyes) in Tianjin Eye Hospital were included in this study. There were 3 males (4 eyes) and 26 females (28 eyes). The age was 63.00±3.45 years old. Equivalent spherical lens degree was -14.16±2.54 D, and axial length was 29.14±1.04 mm. Among them, 3 patients (3 eyes) had lamellar macular holes. All eyes underwent standard pars plana three-channel 25G PPV combined with internal limiting membrane peeling and air filling. Before surgery and at 1, 3, and 6 months after surgery, macular microperimetry was performed with a macular integrity assessment instrument, and the mean retinal sensitivitie (MS) within 10° of the macula, fovea 2° and 4° fixation rates (P1, P2), 63% and 95% bivariate contour ellipse area (BCEA) were recorded. The comparison of MS, P1, P2, 63%BCEA and 95%BCEA at different times before and after surgery was performed by paired t test; the comparison of fixation stability rate was performed by χ 2 test. Results:Compared with before surgery, there were significant differences in the improvement of MS in affected eyes at 1, 3 and 6 months after surgery ( t=-2.208, -3.435,-4.919; P=0.038, 0.002, 0.000). In the pairwise comparison at different times after surgery, only 6 months after surgery and 1 month after surgery were significantly different ( P=0.036). Compared with the preoperative P1, P2, 63%BCEA and 95%BCEA, the P1 and P2 of the eyes gradually increased after surgery, while the 63%BCEA and 95%BCEA gradually decreased, however, the difference was not statistically significant (P1: t=-1.595,-1.698,-1.966; P=0.125, 0.104, 0.062. P2: t=-1.622,-1.654,-1.707; P=0.119, 0.112, 0.102. 63%BCEA: t=1.410, 1.409, 1.553; P=0.172, 0.173, 0.135. 95%BCEA: t=1.412, 1.408, 1.564; P=0.172, 0.173, 0.132). Six months after surgery, all the eyes underwent anatomical repositioning of the macular area, and no serious complications such as full-thickness macular hole and macular hole retinal detachment were found. Conclusions:PPV with internal limiting membrane peeling and air filling is an effective and safe method for MF, and the macular function improved significantly within 6 months postoperatively.

Objective To analyze the relationship between blood glucose,blood lipid and body mass index (BMI) in elderly patients with hypertension.Methods Form January 2016 to December 2017,376 hypertensive patients over 65 year old in Jinan city were enrolled in this study.The sex,age,BMI,fasting blood glucose and blood lipid were investigated and tested.The prevalence of coronary heart disease and diabetes mellitus in hypertensive patients were investigated,and the relationship between BMI and blood glucose,blood lipid and liver function index were explored.Results Of 376 hypertensive patients,the detection rate of diabetes mellitus was 21.01％ (79/376),221 cases were diagnosed with coronary heart disease,with the detection rate of 58.78％.With the rise of BMI,fasting blood glucose showed an upward trend.Person correlation analysis showed that there was a significant positive correlation between BMI and fasting blood glucose(r =0.167,P =0.003).The difference between TG and TC in different BMI groups was statistically significant(FTG =12.48,P ＜ 0.001;Frc =4.83,P ＜ 0.001).The content of alanine transaminase in the overweight group and obese group was significantly higher than that in the normal body weight group,the difference was statistically significant(F =5.24,P =0.005).Conclusion For elderly hypertensive patients,it is urgent to test blood glucose and coronary heart disease screening.For people over the age of 65,obesity is still an important risk factor for hyperlipidemia and hyperglycemia.Therefore,body weight control is needed in elderly patients with hypertensive.

Objective To analyze the influencing factors of water iodine in Shandong Province.Methods The county-based study set Shandong Province as a research site.The water iodine data of county (city) from 2008 to 2010 were obtained from Shandong Institute for Prevention and Control of Endemic Disease.Water iodine content was used as a dependent variable,and soil type,hydrogeological type,topography and distance to the Yellow River were analyzed as independent variables.Normality test and general linear regression analysis of the dependent variables were performed using SAS 9.3 software;geographically weighted regression (GWR) analysis was performed using SAM V4.0 software;related electronic maps were drawn using ArcGIS 9.3 software.Results A total of 108 164 water iodine content data were collected.General linear regression analysis showed that the constructed regression model was statistically significant (F =16.29,P ＜ 0.01),and the soil type was included in the model with a determination coefficient (R2) =0.51.GWR analysis showed that R2 =0.63 and the adjustive determination coefficient (R2adj) =0.59.Considering the autocorrelation of the variable space,the model's goodness of fit was better than that of the traditional general linear regression model.GWR analysis showed that soil type and distance to the Yellow River were major factors related to water iodine in Shandong Province.There was a negative correlation between soil type and spatial variability of water iodine in most areas of Shandong Province,the correlation coefficients weakened gradually from west to east,indicating a geographic gradient variability.The correlation coefficients of distance to the Yellow River and spatial variability of water iodine were negative in some areas,while they were positive in other areas,indicating a clear geographical variability from southwest to northwest.Conclusion The soil type and the distance to Yellow River are important factors affecting the spatial distribution of water iodine in Shandong Province.