It is the key to search the best intensity distribution of pen beam in intensity modulated radiation therapy.The traditional method is based on simulation of annealing algorithm.In this paper,we use an improved method,which shows good performance in both the quality and efficiency.

Objective To study the clinical value of vaccum sealing drainage in plasma cell mastitis.Methods 59 patients with plasma cell mastitis admitted in our hospital were treated with vaccum sealing drainage (the experimental group) from Jan.2011 to Apr.2014.59 plasma cell mastitis patients were treated with traditional vaseline gauze drainage (the control group).Clinical data like hospitalization length,healing time,healing grade,scar size,dressing change frequency,one year recurrence rate and breast deformity were retrospectively analyzed.Results Patients treated with vaccum sealing drainage had shorter hospitalization length and healing time,lower one year recurrence rate and less breast deformity compared to patients treated with traditional Vaseline gauze drainage (P＜0.01),while there was no significant difference in terms of healing grade (P＞0.05).Conclusions Vaccum sealing drainage can significantly shorten the hospitalization time and incision healing time,reduce dressing change frequency and one year recurrence rate in patients with plasma cell mastitis.Because of the smaller scar caused by vaccum sealing drainage,the breast deformity is also less.It is of clinical value for plasma cell mastitis.

Objective To evaluate the curative effect of laparoscopic cholecystectomy(LC)in the treatment of schistosomia-sis liver fibrosis portal hypertension combined with calculous cholecystitis. Methods The clinical data of 196 cases of schistoso-miasis liver fibrosis portal hypertension combined with calculous cholecystitis(Child A 160 cases,Child B 36 cases)treated with LC were collected and analyzed from June 2006 to June 2013. Results Among the 196 cases,there were 154 cases of schistoso-miasis liver fibrosis portal hypertension combined with chronic calculous cholecystitis,and 42 cases of schistosomiasis liver fibro-sis portal hypertension combined with acute calculous cholecystitis. Totally 189 patients underwent LC successfully,but 7 were transited to the general operation because of LC failure,including 3 cases of adhesion around gallbladder and ambiguous dissec-tion of gallbladder triangle,and 4 cases of intraoperative bleeding and the bleeding was difficult to stop under the laparoscopy. All the 196 patients were cured. Conclusion LC is effective and safe in the treatment of schistosomiasis liver fibrosis portal hyperten-sion combined with calculous cholecystitis.

Objective To compare the clinical value of ultrasound and X-ray guided percutaneous nephrolithotomy ( PCNL) for treat-ment of kidney calculi. Methods We searched relevant clinical controlled articles in PubMed,EMBASE/Cochrane library and CNKI data-base. The outcome indicators included stone clearance rate, complication rate,puncture time,blood loss,and hospital days. All data were ana-lyzed by Revman 5. 0 software. Results There were 9 articles involved in 1693 patients. The results suggested that there was no significant difference in stone clearance rate between ultrasound group and X-ray group[OR=1. 11,95%CI(0. 83,1. 49),P=0. 47]. However,the complication [OR=0. 43,95%CI (0. 27,0. 69),P=0. 0004],time to puncture[WMD= -4. 54,95%CI( -0. 45,-8. 62),P=0. 03], blood loss[WMD= -22. 77,95%CI( -36. 57,-8. 97),P=0. 001],and hospital days[WMD= -0. 16,95%CI( -0. 28,-0. 03),P=0. 02] were better in ultrasound group than those in X-ray group. Conclusion Ultrasound and X-ray guided PCNL had an equal stone clear-ance rate,but it seemed that ultrasound was better than X-ray in time to puncture and hospital days after operation. However,the results of this meta-analysis should be treated carefully because of limitation of data and heterogeneity.

Objective To determine the content of capsaicin in different kinds of dried capsicums.Methods A RP-HPLC method was established.The chromatographic column was DiamonsilTM C18(250 mm ? 4.6 mm,5 ? m) and the column temperature was 30 ℃.The mobile phase consisted of methnol ∶ 0.1 % phosphoric acid aqueous solution(70 ∶ 30) with a flow rate of 1.0 mL? min-1.The detection wavelength was 281 nm.Results A good linearity of capsaicin was in the rang of 0.100 6～ 4.024 0 ? g.The average recovery was 101.18 % and RSD was 1.81 %(n=6).Conclusion The method can be used to determine the content of capsaicin in different kinds of dried capsicums.

Objective To investigate the diagnosis and the curative effects of interventional therapy by spiral CT in rupture of hepatocellular carcinoma(HCC). Methods 46 patients were checked by spiral CT and abdominal puncture of non-condensable blood. All the patients were treated by the transcatheter arterial embolization (TAE) with iodinated oil and/or gelatin sponge. Results Characteristic findings were detected in 31 patients,of which 7 patients were chiefly detected by spiral CT. The bleeding of ruptured HCCs was controlled effectively in all the cases treated by TAE without serious complications. Conclusion Spiral CT is susceptive to the diagnosis of the ruptured HCC. TAE can be the chiefly treatment in ruptured HCC with fewer serious complications.

Objective: to observe the protective effect of Swertia Punicea on experimental hepatic injury induced by CCl4 and BCG/LPS respectively. Methods: Mouse models of hepatic injury were induced by CCl4 and BCG/LPS. Serum levels of ALT and AST, MDA content and the pathological changes of hepatic tissue were observed. Results: Swertia Punicea obviously inhibited the rising levels of serum ALT and AST, improved the histological features and relieved hepatic edema induced by CCl4 in mice. However, it has no obvious action on the rising levels of ALT and AST induced by BCG/LPS. It also reduced MDA content and decreased the hepatic index and the splenic index. Conclusion: Swertia Punicea has antioxidation and a protective action on the chemical and immunological hepatic injury, especially on the chemical hepatic injury.

Objective To observe the protective effect of Swertia Punicea Hemsl. on mice chronic hepatic injury induced by CCI_4. Methods Serum levels of ALT, AST and total protein were measured and the liver index, spleen index as well as hepatic pathological changes were also observed. Results Swertia Punicea Hemsl. obviously decreased the levels of serum ALT and AST(P

Objective To compare the efficacy of laryngeal mask of Supreme and i-gel for the airway management in patients undergoing elective lumbar vertebral surgery in prone position. Methods A total of 264 patients,ASA physical status Ⅰ or Ⅱ,scheduled for elective lumbar verte-bral surgery in prone position under general anesthesia were divided into two groups (n =132)using a random number table:laryngeal mask of Supreme group (group S)and laryngeal mask of i-gel group (group I).The laryngeal mask of Supreme or i-gel were respectively placed in group S and group I im-mediately after anesthesia induction according to manufacturers’specification.Volume-controlled ven-tilation was used to observe the ventilation quality.The number of laryngeal mask insertion,laryngeal mask insertion time and the ventilation quality in supine and prone position were recorded,as well as the airway seal pressure.The position of laryngeal mask was evaluated by fibero ptic examination in both supine and prone positions.The blood on the laryngeal mask was noted.Finally,the occurrence of laryngeal mask related complications was observed.Results One patient in group I was excluded due to the failure of laryngeal mask insertion after three attempts.No significant difference in type of laryngeal mask,insertion time,adjusted cases,peak airway pressure,and fiber optic examination in both supine and prone positions between two groups.Compared with group S,group I required signif-icantly more attempts of insertion (P < 0.01 ).Nevertherless,ventilation quality in prone position was improved and airway seal pressure in supine and prone position increased (P <0.01 or P <0.05) in group I.No significant difference was found in the occurrence of laryngeal mask related complica-tions.Conclusion In the airway management of patient undergoing elective lumbar vertebral surgery in prone position,laryngeal mask of i-gel is more difficult to be inserted but can maintain higher air-way seal pressure compared with laryngeal mask of Supreme.

Objective To establish an accuracy test method for MDCT dose assessment based on information in DICOM images.Methods The type of MDCT studied in this paper was widely used in clinical practice.A software package developed by java language was used to automatically read doserelated information from DICOM files of MDCT.The CTDIvol and DLP of each pectoral or abdominal scan was calculated based on these information and the basic scan parameters such as collimation,mAs and pitch.The calculated values were compared with the displayed values.Results For pectoral scans,the difference between the calculated and displayed values was between-2％-8％ for CTDIvol,and-2％-5％ for DLP.For abdominal scan,the difference between the calculated and displayed values was 0-2％ for CTDIvol,and-2％-3％ for DLP.Conclusions This method is useful for MDCT dose assessment and is worth disseminating its application for general use.