China ; Hearing Loss, Noise-Induced ; prevention & control ; Hearing Tests ; standards ; Humans ; Noise, Occupational ; adverse effects ; legislation & jurisprudence ; prevention & control ; Occupational Diseases ; prevention & control

Behavior Therapy ; Coronary Disease ; prevention & control ; Humans ; Smoking Cessation

With the rapid development of intensity modulated radiation therapy (IMRT) technique,the accuracy of radiotherapy has improved,while the pretreatment dose verification has become more complex.Although the experimental measurements,a widely used way to perform dose verification,is accurate and effective,its time-consuming and labor-intensive is still a challenge for physicist.The independent dose verification method such as the depth dose-off axis ratios (OAR) empirical model,Clarkson integral model,convolution model and Monte Carlo model,could partially solve these problems effectively when the accuracy is ensured within a certain range.This approach could save physicists' time to conduct dose recalculation and plan check,and has become the hotspot in the world.This paper,therefore,mainly introduces the correction-based and the model-based independent dose verification methods,and briefly discusses the development of dose verification for IMRT plans.

Apoptosis ; Blood Platelets ; cytology ; Humans

Fatal Outcome ; Humans ; Infant, Newborn ; Leukemia ; blood ; congenital ; diagnosis ; Leukocyte Count ; Male

Humans ; Papillon-Lefevre Disease

OBJECTIVE:To develop a method for simultaneous determination of chlorogenic acid,geniposide,gentiopicro-side,ferulic acid,baicalin and ammonium glycyrrhizinate in Yindan pinggan capsule. METHODS:HPLC method was adopted. The separation was performed on Wonda SilTM-C18 column with mobile phase consisting of acetonitrile-0.4% phosphoric acid solu-tion(gradient elution)at the flow rate of 0.8 mL/min. The detection wavelength were set at 325 nm(chlorogenic acid,ferulic ac-id),250 nm (geniposide,ammonium glycyrrhizinate) and 275 nm (gentiopicroside,baicalin). The column temperature was 30 ℃. RESULTS:The linear ranges were 0.087-3.480 μg for chlorogenic acid(r=0.9998),0.201-8.040 μg for geniposide(r=0.9997),0.200-8.000 μg for gentiopicroside(r=0.9995),0.016-0.640 μg for ferulic acid(r=0.9999),0.105-4.200 μg for ba-icalin (r=0.9999) and 0.028-1.120 μg for ammonium glycyrrhizinate (r=0.9995),respectively. The limits of quantitation were 1.31,0.75,1.14,1.25,0.94,0.98 ng,and the limits of detection were 0.87,0.67,0.96,0.93,0.60,0.88 ng,respectively. RSDs of precision,stability and reproducibility tests were lower than 2.0%;recoveries were 99.9%-101.9%(RSD=0.7%,n=6), 98.7%-100.9%(RSD=0.9%,n=6),98.1%-101.5%(RSD=1.4%,n=6),98.5%-101.3%(RSD=1.3%,n=6),98.5%-101.7%(RSD=1.2%,n=6),98.2%-101.4%(RSD=1.2%,n=6),respectively. CONCLUSIONS:The method is simple and accurate , can be used for simultaneous determination of chlorogenic acid,geniposide,gentiopicroside,ferulic acid,baicalin and ammonium glycyrrhizinate in Yindan pinggan capsule.

Adolescent ; Calculi ; Humans ; Male ; Nose Diseases ; Turbinates

Adult ; Cranial Fossa, Middle ; anatomy & histology ; surgery ; Ear, Inner ; anatomy & histology ; surgery ; Facial Nerve ; anatomy & histology ; surgery ; Humans ; Male

Objective:To investigate the value of magnetic resonance cholangiopancreatography(MRCP)in the diagnosis of pancreas divisum by comparing with endoscopic retrograde cholangiopancreatography(ERCP).Methods:The MRCP and ERCP images of 8 patients with pancreas divisum were retrospectively analyzed.The diagnostic accuracy and findings by MRCP were compared with those by ERCP.Results:MRCP had a diagnostic accuracy of 87.5%(7/8)based on the result of ERCP.ERCP displayed the dominant dorsal pancreatic ducts in all 8 cases and ventral pancreatic ducts in 6 cases;MRCP also displayed the dominant dorsal pancreatic ducts in all 8 cases,but the ventral pancreatic ducts only in 3 cases.Conclusion:As a non-invasive technique,MRCP has important clinical value in the diagnosis of pancreas divisum.