Objective To investigate the application value of sinogram affirmed iterative reconstruction (SAFIRE) algorithm in the coronary computed tomography angiography(CCTA) with tri-low scheme (low tube voltage,low dose contrast agent,low flow rate injection) of the dual-source CT.Methods Totally 120 patients with body mass index (BMI) of 18.6 to 24.9 kg/m 2,heart rate ＜ 65 b/min were selected continuously and the contrast agent iohexol (350 mgI/ml) was used.The patients were divided equally into two groups:FBP group,using 120 kV tube voltages,contrast media dose of 0.9 ml/kg,and injection rate of 5.0 ml/s to carry out prospective ECG-trigger scanning,and image reconstruction based on filtered back projection (FBP) algorithm;SAFIRE group,using 80 kV tube voltage,contrast media dosage 0.7 ml/kg,injection rate of 3.5 ml/s to carry out prospective ECG-trigger high-pitch scanning,and iterative reconstruction technique.CT values of enhanced images and noise of two groups of arterial lumen and left ventricular bottom muscle were measured,and the signal-to-noise ratio (SNR) and contrast to noise ratio (CNR) were calculated.The method of double blind was used to evaluate coronary artery in 4-point scale (1 =non-diagnostic).The average volume CT dose index (CTDIvol) and the dose length product (DLP) for each patient were recorded and the effective radiation doses were calculated.Results The difference in the CT values,image noise,SNR,CNR between the two groups was not statistically significantly(P ＞ 0.05).The effective dose in SAFIRE group was (0.39 ± 0.02) mSv significantly lower than that in FBP group of (4.99 ± 1.36) mSv (t =26.31,P＜0.01).Conclusions For the patients with body mass index (BMI) 18.6 to 24.9 kg/m2,HR ＜ 65 b/min,the application of prospective ECG-trigger high pitch tri-low scheme combined with the iterative reconstruction algorithm in dual-source CT coronary angiography,can obtain the qualified image with lower radiation dose.

Objective To investigate the status of AmpC β-lactamase and extended spectrum β-lactamases (ESBLs) production and drug-resistance characteristic of Enterobacter cloacae.Methods Enterobacter cloacae was isolated and cultured from variety of specimens from April 2005 to July 2007. VITEK32 automatic microbial analytical system was applied to performing identification of bacteria and susceptibility test. ESBLs were confirmed by NCCLS double disc assay, and three-dimensional test was used to detect AmpC.Results A total of 63 strains of Enterobacter cloacae were isolated, including 13(20.6%) single AmpC producing strains, 24(31.8%) single ESBLs producing strains, 6(9.5%) both AmpC and ESBLs producing strains, and 20(38.1%) neither AmpC nor ESBLs producing strains. The resistance of lactamases producing strains was significantly higher than that of lactamases non-producing ones. Especially in both AmpC and ESBLs producing strains, the drug resistance was serous.Conclusion The prevalence of AmpC β-lactamases and/or ESBLs producing strains is a higher level in Fuyang area. The drug resistance of AmpC β-lactamases producing Enterobacter cloacae isn′t identical to that of ESBLs producing one. Different categories of antibacterials should be chosen according to the different types of producing lactamases.

Objective To analyze the outcome of patients with acute obstruction of left colorectal cancer treated by modified antegrade colonic lavage with primary tumor resection and anastomosis.Methods From April 2002 to April 2007,112 patients with acute obstruction of left colorectal cancer underwent surgery.During the operation the left colon was exteriorized and placed into a sterilized plastic bag to protect the surgical field from contamination,then a catheter was inserted via the appendix,and after antegrade colonic lavage,primary resection and anastomosis was performed.Results Tumor resection and primary anastomosis was successfully done in the 112 cases.Postoperatively,1 case had anastomotic leak which healed after reoperation with proximal colostomy,and one patient died.Conclusions Modified antegrade colonic lavage is a simple procedure,the bowel can be rapidly decompressed with essentially no contamination,and has a high level of bowel cleansing.It is possible to safely perform primary resection and anastomosis for left colon cancer after the modified antegrade lavage.

Objective To observe the treatment effect of low molecular weight heparin (LMWH) in the treatment of unstable angina pectoris.Methods LMWH (0.4～0.6 ml Bid) was used through subcutaneous injection in 36 cases of unstable angina pectoris for 14 days on end.Results The clinical effective rate was 66.67%.The drug was effective in the decreasing of the frequency and time of angina pectoris,and also in the decreasing of nitroglycerin consumption as well as in the improvement of the scope and severity of cardiac ischemia by ECG.Conclusion LMWH is an effective and safe drug for the treatment of unstable angina pectoris.

Because of the close relationship with stomach cancer and higher rates of carcinoma, gastric epithelial dysplasia associated with chronic atrophic gastritis is considered the most important precancerous lesion of stomach cancer. Due to the absence of recognized treatment methods, periodical follow-up and monitoring were considered an effective method to prevent the occurrence of gastric cancer. Currently, there are numerous areas requiring attention; the authors provide some suggestions on the recognition and key technologies for follow-up and re-examination.

0.05), but in the HP + group, the D cells markedly reduced as compared with HP - group and showed a significantly difference(P

AIM:To gain the molecular mechanism of active ingredients of EGb 761(ginkgo flavones and ginkgo lides) for the inhibition against A?_(1-42) aggregation and fibrogenesis.METHODS:Circular dichroism spectra(CD) and FI-IR were used to curve-fit and analyze the change in A?_(1-42) second structure under A? aged condition and intervention of ginkgo flavones and ginkgo lides.RESULTS:Analysis that was made of 1700-1600 m(-1) amide-Ⅰ-band and curve fitting indicated that after 30 min to 72-incubation,increase of ?-sheet in A?_(1-42) by(18.5%),but the reduction of ?-sheet by(50.95%) and(36.09%) in 72 h incubation with ginko flavones and ginkgo lides,respectively.And increase of ?-turn by(56.56%) and(46.56%) in sane condition.CONCLUSION:Obviously,?-sheet turned into ?-turn.-CH_2 and-CH groups of ketones and alkanes engaged in A?_(1-42) molecular change.

The purpose of this study is to show the basic principle of receiver operating characteristic (ROC). Some advantages of ROC were given. A simple ROC curve was made to explain the method of plotting. An example of ROC applied to fMRI data was displayed, which showed that ROC can be effectively used in fMRI data.
Brain ; physiology ; Humans ; Magnetic Resonance Imaging ; ROC Curve ; Signal Processing, Computer-Assisted

Objective To enhance the test efficiency and management level of medical record quality by designing and using med-ical record quality management system based on new electronic medical record .Methods System design and development were based on JAVA ,consisting of data exchange platform and medical record quality management system .The platform used C/S archi-tecture and the main program used B/S architecture .Achieved the integration with new electronic medical record and clinical infor-mation system through data exchange with business database .Results The supervision model and business workflow of medical re-cord quality were changed ,and the process and terminal medical record quality were promoted .Conclusion Design and application of the system can provides strong support for medical record quality management ,supplys effective supports for supervision of med-ical record quality ,and plays positive role in promoting medical record quality ,clinical work efficiency ,and medical quality .

Aim To investigate the protective effect and the underline mechanisms of total flavonoids from Sorbus Tianschanica L leaf (TFST) against myocardial ischemia/reperfusion (I/R) injury.Methods The I/R injury model of rat isolated heart was prepared by improved Langendorff retrograde perfusion method.Following the treatment,the coronary blood flow levels (CF),left ventricular developed pressure (LVDP) and maximal rise/fall rate of left ventricular pressure (±dp/dt_(max)) were monitored as the myocardial function.The superoxide dismutase (SOD) activity and malondialdehyde (MDA) content in myocardial tissue were measured by the commercial kits. The in vitro anti-oxidative capacity of TFST was detected by the DPPH and lipid peroxidation reaction system.Results Compared with I/R injury group, pre-incubation with TFST (6.0 mg·L~(-1)) significantly improved the LVDP,±dp/dt_(max) and CF during reperfusion. TFST (6.0 mg·L~(-1)) treatment significantly increased the SOD activities and reduced the MDA levels in myocardium tissue.Moreover,TFST (from 6.25 to 100.0 mg·L~(-1)) scavenged the DPPH, hydroxyl radical and superoxide anion free radicals, and inhibited the lipid peroxidation reaction in a concentration-dependent way.Conclusions All the results demonstrate that TFST possesses the cardioprotective effect on ischemia/reperfusion injury.This efficacy may be due to its antioxidative activity.