Objective To observe the changes and significance of blood fat and myocardial enzymes in patients with hypothyroid myopathy before and after substitutional treatment.Methods The levels of TC, TG, LDL-C,AST, LDH, HBDH and CKMB were detected in 72 cases with hypothyroid myopathy patients before and after substitutional treatment and 60 healthy controls. Results The levels of TC,TG and LDL-C in hypothyroid myopathy patients before substitutional treatment were significantly higher than those in control group ( all P ＜ 0. 05 ), and then significantly low after treatment,which had no significant difference with control group( all P ＞0. 05). The levels of AST,LDH,HBDH and CKMB in hypothyroid myopathy patients before substitutional treatment were significantly higher than those in control group( all P ＜ 0. 05 ) ,and then significantly low after treatment,which had no significant difference with control group( all P ＞0. 05). Conclusion The levels of blood fat and myocardial enzymes were significantly increased in hypothyroid myopathy patients, and recovery to normal after substitutional treatment.

Objective To investigate the feasibility and plan quality of the image-guided volumetric modulated arc therapy (VMAT) based voluntary deep exhale breath-holding technique in the stereotactic ablative body radiotherapy (SABR) for liver tumors.Methods Fifteen patients with liver tumors were involved in this study.All patients were immobilized with voluntary deep exhale breath hold (vDEBH) combined with real-time position management (RPM) respiratory gating system.Treatment was planned using VMAT with 2 modified partial arc and re-planned using intensity modulated radiation therapy (IMRT) technique for comparison.Dosimetric parameters were calculated for plan quality assessment.Quality assurance studies included absolute dose and multiple planar dose verifications,total monitor units and delivery time analysis.Daily cone beam computed tomography imaging was used to verify the motions.Results There were no significant dosimetric differences between VMAT and conventional IMRT plans (P ＞0.05).Both techniques were able to minimize doses to organs at risk including normal liver,kidneys,spinal cord,and stomach.However,the average monitor units with VMAT were significantly lower 28.1％ than those with IMRT(t =3.064,P ＜0.05).The average beam-on time in VMAT plans was 31.6％ shorter than that in IMRT plans(t =2.278,P ＜ 0.05).Conclusions The utilization of VMAT in the treatment planning of SABR for liver tumors under breath control mode has better dosimetrics.In comparison to conventional IMRT plans,VMAT plans have higher efficiency and feasibility.

Objective To explore the relevant factors of diabetic retinopathy(DR).Methods 400 patients with type 2 diabetes were selected,and the relevant factors with DR of type 2 diabetes were analyzed.Results The incidence of DR in type 2 diabetes was 49.0％.In type 2 diabetes when diabetes duration＞15 years,the incidence of DR was 84.7％,duration＜5-year incidence rate was 30.0％ respectively,there were significant differences(P＜0.05).Incidence rate in lower blood glucose group and poor glycemic control group were 38.1％ and 68.5％ respectively,and there was statistically difference(P＜0.05),and in normal blood pressure and well control group,the incidence rates were 44.1％ and 41.2％,which were significantly better than 80.0％ of poorly controlled hypertension group.Conclusion Duration of diabetes,glycemic control level,blood pressure,exercise,and regular schedule were related factors of DR.The most important thing of DR treatment and prevention was to control blood glucose.

ObjectiveTo observe the affection of cilostazol combined with valsartan in treating patients with early diabetic nephropathy on serum homocysteine and cystatin C,MethodsNinety-six cases with early diabetic nephropathy were divided into two groups by random digits table method with 48 cases each:observation group was treated with cilostazol and valsartan,control group was treated with valsartan alone.The effect and the levels of 24 h urinary albumin,serum homocysteine and cystatin C before and after treatment in two groups were compared.ResultsThe total effective rate in observation group [85.4％(41/48) ] was significantly higher than that in control group [66.7％(32/48) ](P ＜ 0.05 ).The levels of 24 h urinary albumin,serum homocysteine and cystatin C were significantly decreased after treatment of three weeks in observation group and control group [ (125.48±13.76) mg,(9.25±3.52)p mol/L,(7.82±2.14) mg/L and (168.38±15.43) mg,(13.72±4.23) μ mol/L,(9.57±2.85) mg/L vs.(279.31±21.52) mg,(18.52±6.14) μ mol/L,( 13.25±3.79) mg/L and (275.24±19.31 ) mg,( 18.48±6.12) μ mol/L,( 13.19±3.76)mg/L](P＜ 0.05).And the levels of 24 h urinary albumin,serum homocysteine and cystatin C after treatment of three weeks in observation group were obviously lower than those in control group(P ＜ 0.05).Conclusions Cilostazol combined with valsartan in treating patients with early diabetic nephropathy can improve clinical effect obviously,degrade the level of urinary albumin,homocysteine and cystatin C.Therefore,it deserves to be applied in clinic.

Objective To analyze the radiation dose to contra-lateral breasts and estimate the incidence risk of contra-lateral breast cancer for women undergone unilateral breast cancer radiotherapy.Methods The radiation doses of contra-lateral breasts for 49 patients were counted and analyzed in a hospital,and the risk of contra-lateral breast cancer in different age groups that induced by radiotherapy was estimated based on BEIR Ⅶ model combined with the Chinese lifetime table.Results The prescribed doses for the patients were all 50 Gy.The mean dose to contra-lateral breasts ranged from 0.14 Gy to 3.59 Gy,with an average of (1.21 ±0.89) Gy,and the maximum point dose varied from 0.98 Gy to 45.27 Gy,with the average of (17.42 ±13.20) Gy.Both the maximum point dose and the mean dose obviously varied among the patients,and their correlation was significant (R =0.527,P =0.000).Furthermore,no significant differences of the mean dose was found among the ages (P ＞ 0.05).The lifetime attribute risks of contra-lateral breast cancer were estimated to be 2 449,1 857,994,446,173 and 55 for per 100 thousand women corresponding to the ages of 35,40,50,60,70 and 80,respectively.Conclusions In the radiotherapy for unilateral breast cancer,the dose delivered to the contra-lateral breast is about 1 Gy order of magnitude,the risk of contra-lateral breast cancer cannot be ignored for young women.Therefore,the irradiation dose of contra-lateral breasts should be controlled as less as possible in planning the treatment.

Brown adipose tissue (BAT) holds great promise for the prevention and treatment of metabolism diseases through thermoregulation. Polycystic ovary syndrome (PCOS) is a complex condition with anovulation, hyperandrogenism, and polycystic ovaries, and also manifests glucolipid metabolic disorders. Recent researches have shown that transplantation of BAT into a PCOS rat could significantly alleviate the phenotypes. This article reviews the role of BAT in pathogenesis of PCOS, which may provide information for prevention and treatment of PCOS.

Objective:The Chinese pediatric mesh-type reference phantoms were developed and applied in the dose assessment of X-ray radiography.Methods:The 5- and 10-year-old Chinese pediatric mesh-type reference phantoms were developed based on the CT data. Based on the phantoms, the Monte Carlo method was applied to simulate the X-ray radiography to calculate the organ dose conversion coefficient and the effective dose conversion coefficient in different radiography conditions.Results:The 5- and 10-year-old Chinese pediatric mesh-type reference phantoms were developed, and the physical parameters were consistent with the national standard. The differences of the organ mass between the established phantoms and reference data were within 2%. The database of the pediatric chest posteroanterior projection and abdominal anteroposterior projection, tube voltage 60-90 kVp, total filtration 2.5~4 mmAl were simulated, and the difference between the effective dose conversion factor and the literature result was within 3%.Conclusions:The established Chinese pediatric mesh-type reference phantoms can be applied in the studies of radiation protection and clinical medicine and their result can provide an important reference for the dose assessment of the pediatric X-ray radiography.

Objective: To analyze the epidemiological history, clinical manifestations, treatment and the short-term prognosis of 31 cases of 2019 novel coronavirus(2019-nCoV) infection in children from six provinces (autonomous region) in northern China. Methods: A retrospective analysis of the epidemiological history, clinical symptoms, signs, laboratory examinations, chest imaging, treatment and the short-term prognosis of 31 cases of 2019-nCoV was conducted. The patients were diagnosed between January 25th, 2020 and February 21st, 2020 in 21 hospitals in 17 cities of six provinces(autonomous region) of Shaanxi, Gansu, Ningxia, Hebei, Henan and Shandong. Results: The age of the 31 children with 2019-nCoV infection was 7 years and 1 month (6 months -17 years). Nine cases (29%) were imported cases. Other 21 cases (68%) had contact with confirmed infected adults. One case (3%) had contact with asymptomatic returnees from Wuhan. Among the 31 children, 28 patients (90%) were family cluster cases. The clinical types were asymptomatic type in 4 cases (13%), mild type in 13 cases (42%), and common type in 14 cases (45%). No severe or critical type existed. The most common symptom was fever (n=20, 65%), including 1 case of high fever, 9 cases of moderate fever, 10 cases of low fever. Fever lasted from 1 day to 9 days. The fever of fifteen cases lasted for ≤3 d, while in other 5 cases lasted > 3 d. Other symptoms included cough (n=14, 45%), fatigue (n=3, 10%) and diarrhea (n=3, 9%). Pharyngalgia, runny nose, dizziness, headache and vomiting were rare. In the early stage, the total leukocytes count in peripheral blood decreased in 2 cases (6%), the lymphocytes count decreased in 2 cases (6%), and the platelet count increased in 2 cases (6%).Elevation of C-reactive protein (10%, 3/30), erythrocyte sedimentation rate(19%,4/21), procalcitonin(4%,1/28), liver enzyme(22%, 6/27) and muscle enzyme (15%, 4/27) occurred in different proportions. Renal function and blood glucose were normal. There were abnormal chest CT changes in 14 cases, including 9 cases with patchy ground glass opacities and nodules, mostly located in the lower lobe of both lungs near the pleural area. After receiving supportive treatment, the viral nucleic acid turned negative in 25 cases within 7-23 days. Among them, 24 children (77%) recovered and were discharged from hospital. No death occurred. Conclusions In this case series, 2019-nCoV infections in children from six provinces (autonomous region) in northern China are mainly caused by close family contact. Clinical types are asymptomatic, mild and common types. Clinical manifestations and laboratory examination results are nonspecific. Close contact history of epidemiology, nucleic acid detection and chest imaging are important bases for diagnosis. After general treatment, the short-term prognosis is good.