Medical imaging involves not only the multidisciplinary knowledge,but also the concurrent updating of the knowledge system related to the imaging technology development.In this case,it's an important issue how to guarantee the teaching quality of the medical imaging postgraduate education effectively and cultivate the professsionals with higher comprehensive quality in the limited teaching time available.Thus the implementation as well as the teaching effects of the reading report in the promotion of medical imaging postgraduates' research ability and comprehensive quality is needed to be discussed from the accumulation and update of knowledge system.

Objective To evaluate the correlation between the irradiation dose and superparamagnetic iron oxide (SPIO) enhanced MR imaging of the irradiated liver. Methods 25 rabbits were separated randomly into 5 groups. 3 days after focal irradiation (0, 10, 20, 30 and 40Gy), MR imaging was performed before and after SPIO injection with TSE-T 2W sequence, and the number of Kupffer cell containing SPIO particles was counted. The characteristics of MR enhancement were evaluated according to the pathological findings.Results The liver injury induced by no less than 30Gy irradiation can be detected by SPIO-enhanced T 2 weighted imaging (P

OBJECTIVE:Using in vitro studies,we evaluated the antibacterial activity of amoxicillin/tazobactam against 128 strains of pathogens isolated from patients and compared with amoxicillin/clavulanic acid and amoxicillin/sulbactam.METHODS:To detect the minimum inhibitory concentrations (MIC)of four ?-lactams against 128 clinically isolated strains with agar dilution method.RESULTS:The results indicated that the in vitro antibacterial activity of amoxicillin/tazobactam(2∶1) was the best.The MIC50 of amoxicillin/tazobactam(2∶1) is 1/4～1/8 times than those of amoxicillin/sulbutam and amoxicillin/clavulanic acid.The MIC90 of amoxicillin/tazobactam(2∶1) was 1/2～1/4 of those of amoxicillin/sulbutam and amoxicillin/clavulanic acid.The combination ratio 2∶1(amoxicillin/tazobactam)of the two compounds was more suitable than other combination ratios(4∶1 and 8∶1)for inactivating ?-lactamase.CONCLUSION:The in vitro antibacterial activities of amoxicillin/tazobactam(2∶1) against MRSA,MRSE,MSSA and E.coli are high.It showed that amoxicillin/tazobactam(2∶1)is stable to ?-lactamase and is an effective bactericidal agent.

Objective To investigate the methods and evaluate their efficacy of pseudoaneurysms by color Doppler ultrasound guided compression and injection treatment.Methods Twenty patients with seventeen femoral artery pseudoaneurysms and three subclavian artery pseudoaneurysms underwent compression and injection treatment with color Doppler ultrasound guided.Results Simple compression method presented a successful rate of 86%(12 out of 14 patients).Two with subclavian artery pseudoaneurysms were injected with medical OB glue,as a result,one had a hard knot in the lesion after treatment,the other was thrombosed in the remote artery.Thrombin injection achieved the rate of success 100%, 4 in 4 patients.Conclusions Color Doppler ultrasound guided compression and thrombin injection is a simple,safe and effective method for the treatment of postangiographic pseudoaneurysms,but medical OB glue injection may bring about complications.

the incidence of the complication.

ObjectiveTo discusses the MSCT multiplanar reconstruction manifestation (MPR) of localized fat collection adjaction to subdiaphragmatic inferior vena cava (IVCfat).MethodsThe thoracic and abdominal MSCT scan data of 8246 patients were browsed,45 patients with presumed IVCfat on axial CT scans were further studied prospectively with MSCT MPR.The predisposing position of IVCfat and its relationship with IVC were observed.It was divided into two kinds of intraluminal type and extraluminal type according to the angle of IVCfat with respect of the wall of IVC.The other 50 patients without IVCfat were randomly selected as the control group.The sagittal inclination angle (SIA) and diameter ratio (DR) between supra- and sub-diaphragmatic IVC between the two groups were compared by using t test.Results The detection rate was 0.55％ (45/8246).Of which hepatic vein lacuna 8 patients,subdiaphragmatic gap medial to IVC 28 patients and IVC groove 9 patients.The shape of IVCfat showed mainly for the round,oval and crescents on axial CT scans,of 15 patients intraluminal type,4 showed target signs .The shape of IVCfat showed mainly for half-moon at MPR.The SIA and DR at IVCfat group were 21.62° ± 8.42°and 2.01 ±0.84 respectively,at control group were 16.75° ±7.82°(t =1.594,P ＞0.05) and 1.31 ±0.28(t =2.341,P ＜ 0.05 ) respectively.ConclusionThe round,oval or half of limited fat density shadow adjaction to subdiaphragmatic inferior vena cava which similar to in the lumen is the characteristic performance of IVCfat,it may be an anatomical variation.

Objective To monitor epidemiological distribution and antibiotic resistance of bacteria isolated from cerebral spinal fluid in neurosurgically treated patients. Methods Bacteria isolated from cerebral spinal fluid specimens and antibiotic resistance identification results of patients admitted into our department from January 2003 to December 2007 were collected to analyze distribution and antibiotic resistance of the pathogens. Results Of 437 isolates, Gram-positive bacilli and Gram-negative bacilli accounted for 73.5% (321 isolates) and 26.5% ( 116 isolates), respectively. The first five most fre-quently isolated pathogens were staphylococcus epidermidis (55.6%), staphylococcus aurens (15. 3% ), enterobacter (6.6%), aeinetobacter (5.3%) and pseudomonas aeruginosa (3.0%). The anti-bacterials with highest susceptibility to Gram-negative bacilli were imipenem ( 83.9% ), amikacin ( 68. 8% ), ciprofloxacin and tobramycin (67.4%), cefepime (61.3%) and ceftazidime (69.2%). The other antibacterials had susceptibility of less than 60%. Conclusions The prevailing pathogens in post-operative intracranial infection are Gram-pnsitive bacilli, especially staphylococcus epidermidis and staphylococcus anreu. Data collected in present study may provide valuable information for prophylactic and empirical antibiotic use in post-operative intracranial infection.

Objective Using MRI compatible OxyLiteTM fiber-optic microprobes to verify the reliability of detecting the oxygenation changes in rats C6 glioma by BOLD fMRI with non- hemodynamic response function (non-HRF) post-processing algorithm. Methods A total of 20 male SD rats were used to establish the subcutaneous C6 glioma model. GRE-EPI BOLD fMRI scans were performed in the tumor-bearing rats with Carbogen inhalation after anatomic scans using 1.5 T MR imaging system with
Micro-47 microscopic coil. Fiber-optic microprobes were implanted in tumor to acquire the dynamic pO2 indications during BOLD fMRI scan.“Oxy-localization map”and“oxy-amplitude map”were generated from BOLD functional image data by non-HRF post-processing algorithm analysis. A ROI about 1.5 mm on a side centered to the tip of microprobe was defined on the MRI morphological image, and then was copied onto the“oxy-localization map”and“oxy-amplitude map”to extract the values of significant re-oxygenation (T), percent BOLD signal change (ΔPSC). The mean difference of pO2(ΔpO2) measured by fiber-optic microprobes before(pO2-Air)and after (pO2-Car)Carbogen inhalation in the ROI areas was calculated. Correlation analysis was madebetween cov (T value, Δ pO2) and cov (ΔPSC value, Δ pO2). The difference between pO2-Air and pO2-Car were tested by Mann Whitney U test. Results pO2 was successfully measured and recorded from 23 points in tumor using fiber-optic microprobe during the BOLD fMRI scan. The analysis results both of physiological and functional imaging parameters were as follows: pO2-Air=2.285(19.056) mmHg,pO2-Car=14.701(48.390)mmHg,ΔpO2=8.107(33.557)mmHg,ΔPSC=0.402(2.192)%,T=2.025 (8.293). (1) 10 points were identified clearly in parenchyma area of tumor. The mean value of pO2 during air inhalation [19.462(21.511)mmHg] significantly increased after Carbogen inhalation [59.904(56.710)mmHg] (U=14.000,P=0.007). (2) 5 points were identified in tumor necrosis area. The mean value of pO2 during air inhalation [0.149(0.479)mmHg] showed no significant change comparing with Carbogen inhalation[0.273 (8.050)mmHg](U=9.000,P=0.465). (3) 8 points were identified in the boundary of tumor parenchyma and necrosis areas. Among which, 5 showed the similar pO2 change to that located in tumor necrosis area, 2 showed the similar to the tumor parenchyma. However, the pO2 showed continuously decrease after Carbogen inhalation in the last 1 point. TheΔpO2 measured from the total of 23 points correlated positively toΔPSC and T value extracted from the corresponding ROI (r=0.660,0.576,P<0.01). TheΔpO2 measured from 10 points in tumor parenchyma correlated positively to ΔPSC(r=0.717,P=0.020). Conclusion“Oxy-localization map”and“oxy-amplitude map”generated from BOLD fMRI combined with non-HRF post-processing algorithm could show reliably not only the location but also the extent where the re-oxygenation occurred within tumor.

Objective:There is a large of population of macrophages resident in the testicular interstitial tissue under normal conditions and they are increased during inflammation.The mechanisms involved are unclear.This study focused on the expression of monocyte chenoattractant protein-1 (MCP-1) in the mouse testis before and after an intraperitoneal injection of LPS.Methods:The expression of MCP-1 in testis was detected by using reverse transcription-polymerase chain reaction and Western blot,the immunofluorescent technique was used to detect the localization of MCP-1 protein in testis.Results:In the normal testis,the expression of MCP-1 mRNA and protein was detectable by RT-PCR and immunofluorescent technique,respectively.The level of testicular MCP-1 mRNA increased dramatically at 3-24 h after LPS treatment,the level of MCP-1 protein increased at 12 h after LPS treatment.The MCP-1 was localized in the testicular interstitial tissue.Conclusion:MCP-1 may play a role in maintaining the resident macrophage population in normal testis and regulating monocyte and macrophage influx in inflammatory testis.

OBJECTIVE:To study the pharmacokinetics and relative bioavailability of clindamycin phosphate capsules in healthy volunteers METHODS:A single oral dose of 300mg domestic clindamycin phosphate capsules or imported Dalacin C was given to 18 healthy male volunteers in an open randomized crossover study Clindamycin concentrations in plasma were determined by microbiologic assay The pharmacokinetic parmameters as well as relative bioavailability were calculated with 3p97 software and bioequivalence was analysed with NDST software RESULTS:The concentration-time curves of domestic clindamycin phosphate capsules or imported Dalacin C were well fitted for one-compartment open model The pharmacokinetic parameters of domestic and imported products were:Tmax(0 94?0 51) and(0 75?0 35)h;Cmax(3 86?0 62)?g/ml and (4 08?0 60)?g/ml;AUC0～12(14 88?3 64)?g/(ml?h)and(16 07?3 68)?g/(ml?h)respectively There were no significant differences in AUC0～12 and Cmax between two products CONCLUSION:The relative bioavailability of clindamycin phosphate capsules was(93 4?14 9)% compared with imported Dalacin C The results showed that the two formulations were bioequivalent