According to the deficiencies of the present treatment planning systems,a research of field size dosage calculation based on two-dimensional localization image is presented.The technologies are emphasized including coordinate transformation,image preprocessing,edge detection & extraction and field size dosage calculation,etc.

Objective To observe the effects of calcitonin on osteoclast activity and expressions of osteoprotegrin (OPG) and receptor activator of NF-?B ligand (RANKL) in vitro. Methods Osteoclasts and their precursors were mechanically isolated from long bones of SD rats and incubated on bone sheet in MEM with different concentration of calcitonin. Number, morphology of the osteoclasts were detected with tartrate-resistance acid phosphatase (TRAP) staining. Image-Pro Plus counted the resorption pits and areas on slices, stained by toludine blue. RT-PCR was used to examine the expressions of OPG and RANKL of osteoclast. Results Number of osteoclasts were decreased with increasing CT concentrations. After incubation for 5 days, resorption pits were decreased in a concentration-dependent manner (P

Objective To investigate the impact of enteral nutrition (EN) through jejunal feeding tube on the nutritional status and immunologic function of patients during chemotherapy after total gastrectomy.Methods Totally 86 patients with gastric cancer who had undergone total gastrectomy with radical resection and jejunostomy received adjuvant venous chemotherapy in our department from January 2009 to June 2010.They were divided into EN group ( n =43 ) and control group ( n =43 ) according to the hospitalization number.The EN group maintained the jejunostomy tube until the end of 6 courses of chemotherapy,and was given EN support for 7 days through jejunal tube during each course of chemotherapy; the control group removed the tube before chemotherapy without further dietary restriction or nutrition support.The nutritional and immunologic indicators on the 1 st day before chemotherapy and the 1st day after 6 chemotherapy courses were measured.ResultsThree patients in the EN group withdrew from the study because of catheter blockage or catheter loss and 2 patients in the control group failed to complete the trial because of chemotherapy side effects or economic reasons; 81 patients entered the final analysis.After 6 courses of chemotherapy,both groups experienced body weight loss,but the percentage is significantly lower in EN group than in control group (6.9％ ± 0.95％ vs.11.2％ ± 1.32％,P =0.0000).Compared with the nutritional status before the first chemotherapy,the prognosis nutritional index (PNI) in both groups declined after the 6th chemotherapy.Such decline was not statistically significant in EN group ( P =0.1534) but was significant in control group (P =0.0000).The PNI in EN group after chemotherapy was significantly higher than that in control group (P =0.0040).The levels of IgG,NK,CD4 +,and CD4 +/CD8 + were significantly higher in EN group than in control group ( P =0.0083,0.0143,0.0000,and 0.0000,respectively) after chemotherapy.ConclusionEN during postoperative chemotherapy may improve the nutritional status and immunologic function in gastric cancer patients after total gastrectomy.

Objective To investigate the effects of epidural administration of a mixture of betamethasone and lidocaine on nerve root inflammation and epidural space adhesion in rabbits. Methods Twenty-four adult male New Zealand white rabbits weighing 2.0-2.1 kg, were randomly divided into 2 groups ( n = 12 each): control group and treatment group. A catheter was inserted into epidural space at L2,3 interspace. Twenty-four hour after epidural catheter placement, talcum powder 0.5 mg/kg was injected into epidural space to make the model of nerve root inflammation and epidural space adhesion. Three days later a mixture of lidocaine 2.5 mg/kg and betamethasone 0.25 mg/kg was injected via the epidural catheter in treatment group, while the equal volume of normal saline was given in control group. At 21 days after administration of lidocaine and betamethasone, the spinal cord was removed, and dura mater and nerve root were checked with naked eye, light microscope and electron microscope.The neutrophil count in the dura mater was determined. Results There was nerve root inflammation and epidural space adhesion in control group. The nerve root inflammation and epidural space adhesion was not observed in treatment group. The neutrophil count was reduced in treatment group (21 ± 12) compared with control group (250 ±43) ( P < 0.01) . Conclusion Epidural administration of a mixture of betamethasone and lidocaine can alleviate nerve root inflammation and epidural space adhesion.

Objective To explore the value of ultrasound-guided core needle biopsy (CNB) in diagnosis of thyroid nodules.Methods The clinical data of 395 patients with thyroid nodules who underwent ultrasound-guided CNB were retrospectively analyzed,and the results of CNB pathology of 278 patients who endured surgery were compared with postoperative wax pathology results.Results All patients completed CNB successfully and satisfaction rate for tissue samples was 100％.Local hematoma occurred in one case and relieved by conservative therapy.The CNB pathology results of 278 cases of patients were as follows:92 cases were malignancy,including 91 cases of papillary thyroid carcinoma,lcase of medullary thyroid carcinoma; 182 cases were benign,including lcase of parathyroid adenoma,48 cases of adenoma,and 133 cases of nodular goitre and other nodular affection.In 278 patients who underwent surgery,the CNB pathology results in 273 cases,including 90 malignancy cases and 183 benign cases,were consistent with postoperative wax pathology results and false positive occurred in 1 cases,ambiguous occurred in 4 cases.So the accuracy,sensibility,specificity,missed diagnosis rate,and misdiagnosis rate of ultrasound-guided CNB for differential diagnosis of thyroid malignant nodules from benign nodules were 98.20％ (273/278),95.79％ (91/95),99.45％ (182/183),4.21％ (4/95) and 0.55％ (1/183).Conclusion Ultrasound-guided CNB has important value on differential diagnosis of thyroid nodules.It is safe and effective.

Objective To improve the quality of life in gastric cancer patients after total gastrectomy by exogenous trypsin supplement.Method In this study 106 patients were divided into two groups,with 53 patients in each group,oral pancreatic enzyme capsule was given in comparison without in control group.Patients were asked to fill in EORTC QLQ-C30 questionnaire and Korenaga questionnaire at half a year postoperation,stool sample was collected at the same time for fecal fat assay.Results A total of 86 patients completed this test at postoperation half a year.With a comprehensive assessment of quality of life in patients by the scoring system of EORTC QLQ-C30 and Korenaga and the fecal fat contents measurement.Exogenous trypsin plays a positive role in preventing weight loss,improving emotional function,alleviating loss of appetite,insomnia,fatigue,postprandial fullness,nausea,vomiting and diarrhea,and improving intestinal tolerance to fat and the overall health status of patients.Conclusions Total gastrectomy causes exocrine pancreatic dysfunction,exogenous supplement of the enzyme improves postoperative quality of life in these patients.

ObjectiveTo study the diagnostic value of sonographic “Leopard pattern” sign in breast hyperplasia.MethodsTwo hundred and twenty-three female patients in Beijing Friendship Hospital from October 2012 to April 2013 were choosen. All the cases were diagnosed as mammary gland hyperplasia clinically, and their breast ultrasound images show the breast imaging-reporting and data system (BI-RADS) grad was 0 or 1. These patients were divided into 3 groups according to their age, Group A: 20 to 35 age (36 cases), Group B: 36 to 50 age (102 cases), and Group C: order than 50 year-old (85 cases). The pathological diagnosis were obtained by ultrasound guided breast biopsy. With pathological diagnosis as the gold standard and “Leopard sign” as ultrasound diagnostic criteria, the sensitivity, specificity, accuracy, positive predictive value and negative predictive value were calculated. The consistency between the ultrasonic and the pathological diagnosis were analyzed by Kappa statistical test.ResultThe diagnostic consistency test of the total sample of 223 cases: in terms of the ultrasonic Leopard sign” for the diagnosis of breast hyperplasia, the sensitivity was 69% (59/85),the specificity was 46% (64/138), the accuracy was 55% (123/223), the positive predictive value was 44% (59/133), the negative predictive value was 71% (64/90), the consistency was poor (Kappa=0.14,P<0.05). Group A:the sensitivity was 90% (18/20), the specificity was 50% (8/16),the accuracy was 72% (26/36), the positive predictive value was 69% (18/26), the negative predictive value was 80% (8/10), the consistency was good (Kappa=0.42, P<0.05);Group B:the sensitivity was 70% (33/47), the specificity was 49% (27/55),the accuracy was 59% (60/102), the positive predictive value was 54% (33/61), the negative predictive value was 66% (27/41), the consistency was poor (Kappa=0.19,P<0.05); Group C: the sensitivity was 44% (8/18), the specificity was 43% (29/67), the accuracy was 44% (37/85), the positive predictive value was 17% (8/46), the negative predictive value was 74% (29/39), the consistency was poor (Kappa=0.08,P<0.05).Conclusion“Leopard pattern” sign is not suitable as an independent standard in diagnosing breast hyperplasia disease.

OBJECTIVETo explore the effects of salidroside (sal) on the expressions of Bcl-2, Bax and caspases-3 proteins in cultured rat subventricular zone (SVZ) neural stem cells (NSCs) exposed to hypoxia injury.

METHODSPrimarily cultured SVZ NSCs from adult SD rats were incubated with salidroside (120 and 240 µmol/L) for 24 h prior to exposure to hypoxia. The cell viability was assessed with MTT assay, and the cell apoptosis was analyzed using TUNEL staining and flow cytometry. Western blotting was performed to detect the expressions of Bcl-2, Bax and caspase-3 in the cells.

RESULTSSalidroside pretreatment of the cells for 24 h resulted in an obvious resistance to hypoxia-induced cell apoptosis and decrement of cell viability (P<0.05). Salidroside also antagonized the effect of hypoxia exposure in lowering Bcl-2/Bax ratio apoptosis of rat neural stem cells and decreased the expression of caspases-3 protein (P<0.05).

CONCLUSIONSalidroside can significantly resist hypoxia-induced. The neuroprotective effect of salidroside may be related to the modulation of expressions of apoptosis-related proteins.

Animals ; Caspase 3 ; metabolism ; Cell Hypoxia ; Cells, Cultured ; Flow Cytometry ; Glucosides ; pharmacology ; Neural Stem Cells ; drug effects ; Phenols ; pharmacology ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Rats ; Rats, Sprague-Dawley ; bcl-2-Associated X Protein ; metabolism

Objective To assess the results of emergency endovascular stent-grafting for patients with acute Stanford type B aortic dissection(type B AAD)within 24 hours of onset.Methods Between June 2007 and October 2008,30 patients with acute type B aortic dissection underwent emergency endOVascular stent-grafting within 24 hours of presentation.Under general anesthesia,stent-graft was deploved at the proper position of first tear entry through femoral artery under X-ray monitering.Follow-up by CT was performed 1 w,1 m ,3 m,6 m,1 y postoperatively to observe the efficacy and complications such as endoleak,migration and fracture of stent-graft. Result The technical success rate was 100%;13.4%(4 cases) endoleak rate was identified immediately after deployment.Follow up was made between 1 month to 19 months,averaging at(12±8)months,3.3%type-1 endoleak Was observed after 6 months;One patient died within 30 days possibly of dissection rupture;One patient died of acute liver failure during the follow-up. Conclusion Endovascular repair with stent-graft within 24 hours of presentation was effectivefor the treatment of acute type B aortic dissection.

Objective To evaluate the role of nutritional parameters in prognosis,especially in the early and late mortality of hospital-acquired acute kidney injury (AKI) patients.Methods This study was a prospective cohort study conducted in a hospital comprising 1500 beds in Shanghai, China. One hundred ninety-four patients with hospital-acquired AKI, as determined using the RIFLE staging criteria,were enrolled as subjects after obtaining informed consent.Patients with AKI caused by postrenal obstruction,glomerulonephritis,interstitial nephritis or vasculitis were excluded.Nutritional evaluation,including subjective global assessment (SGA),anthropometric and laboratory examination,was conducted. Other laboratory measurements and clinical data were recorded.The primary outcome was early mortality (≤ 7 days) and late mortality (8-28 days) after enrolling into the study. Results AKI patients at enrollment were characterized by a high prevalence of malnutrition as determined by SGA, anthropometric and laboratory examination.Univariate analysis showed that the SGA,the serum levels of prealbumin,cholesterol and total lymphatic cells, and the Maastricht index were significantly different among early mortality,late mortality and survival groups.The serum prealbumin and cholesterol levels in the early death group were significantly lower than those in the survival and late death groups (P＜0.05).Multivariate analysis revealed that SGA,albumin,prealbumin and cholesterol remained independently and significantly associated with early mortality after adjusting for age,sex,dialysis,ventilation,hemoglobin,platelets,bilirubin,and Glasgow coma score.The areas under the receiver operating characteristic curve to predict early mortality for albumin,prealbumin and cholesterol were 0.591,0.736 and 0.603,respectively,with that of prealbumin significantly higher than others (P＜0.05). Conclusion Low levels of serum prealbumin,albumin and cholesterol at enrollment are independtly associated with increased early mortality in hospital-acquired AKI patients.