The transmitting network is reconstructed to make the network syetem convenient,stable and swift when transmitting CT image.

0.05).84.58%(28/33)of the expanding bone destruction were resulted from benign and 84.62%(33/39) of the aggressive bone destruction were resulted from malignant.The form of bone destruction of maxillary sinus in the benign and the malignant was different(? 2=34.61,?

Objective To study the CT appearances of sacroiliac joint with ankylosing spondylitis(AS) and evaluate the pathology's degree,in order to improve the early diagnosis of AS.Methods 65 cases with AS were examined with CT.52 cases were males and 13 cases were female.The age ranged from 16 years to 52 years with average age of 23.6 years.Results In 65 cases,CT showed Ⅰ degree in 11 cases(16.9%),Ⅱdegree in 22 cases(33.8%),Ⅲdegree in 24 cases(36.9%) and Ⅳdegree in 8 cases(12.3%).Bilateral sacroiliac joint were involved in 54 cases(83.1%) and one side involved in 11 cases(16.9%).Early CT findings included coarse articular facet,interrupted joint cortex,vague articular face,subcortical microcysts and sclerotic articular surface,while joint space was normal.CT findings in progressive stage were uneven articular facet,serrated bony cortex,subcartilaginous bone microcysts,obviously sclerotic articular surfaces,extended joint space.In stable stage,CT findings included joint ankylosis and articular space disappearance.Conclusion CT examination is favourable for early diagnosis of AS.

Objective To investigate TEM and SHV ESBLs in Klebsiella pneumoniae and Escherichia coli clinical isolates from West China Hospital of Sichuan University and detect resistance of ESBLs-producing isolates. Methods The TEM and SHV ESBLs-encoding gene was amplified by PCR and was sequenced. And the MIC of eight antibiotics against the ESBLs-producing strains were detected by agar dilution. Results All strains were resistant to cefotaxime; eleven strains were resistant to aztreonam; two were resistant to ceftizidime; eleven, five and three were resistant to ciprofloxacin, amikacin and cefoxidine respectively; All strains were susceptible to imipenem. Ten strains of twelve ESBLs-producing strains carried bla SHV-2, two carried bla TEM-19. Conclusions ESBLs producers were mainly resistant to cefotaxime and aztreonam and most of them were multi-drug resistance; Cefotaxime resistance is partially due to production of SHV-2 and TEM-19 in this study.

Objective To collect the URL of Chinese and English periodicals and medical seraching engines,sum up the methods and procedures of getting radiolgical literature from the Internet.Methods To search URL with a computer connected to the Internet,by software of Internet Explorer and searching engines known.Results The URL of 21 English and 11 Chinese radiological perodicals,14 searching engines,4 medical databases were obtained,which can be used to find the abstract and full text of the articles we want from the internet.Conclusion To obtain radiological literature from the internet can be easy,convenient,rapid and economical.

Objective To study the value of 3D-CT reconstruction in the diagnosis of surface involved lesions of bone for its nature and location,comparing with plain film and 2D-CT.Methods Surface-involved lesions of bone revealed by plain-film were performed spiral CT examination.Multi-planar reconstruction(MPR)and surface shading display(SSD)were performed among 20 cases which had pathologic results.The diagnosing correct rate of nature and location in all the techniques were compared.Results The correct rate of nature diagnosing of plain film,2D-CT,MPR and SSD was 75%,80%,65%,60% respectively;correct rate of location diagnosing was 90%,75%,85%,95% respectively.The highest nature diagnostic correct rate was found in 2D-CT.The highest location diagnostic correct rate was found in SSD.Conclusion Spiral CT stereoscopic reconstruction is of great value in the location diagnosing of surface-involved bone lesion.

BACKGROUND: Researches on vitodynamics present that percutaneous vertebroplasty (PVP) can strengthen hardness and intension of single osteoporosis vertebral body after injection of bone cement; however, the infused volume and site of bone cement for maintaining mechanical stability of vertebral body should be further studied.OBJECTIVE: A numerical calculation method on finite element models (FEM) for biomechanical analysis has been developed, while a boundary condition describing the relative L1 -L2 displacement is imposed on the FEM to account for three-dimensional physiological states.DESIGN: Non-randomized control study.SEITING: Beijing Neurosurgical Institute.MATERIALS: One female patient aged 54 years with compressibility fracture at lumbar vertebrae L1-L2 induced by osteoporosis was diagnosed with CT examination, and the patient was told the fact. Based on CT scanning before and after PVP, 90 serial sections with the thickness of 1 mm were obtained and the size of each pixei was 0.33 mm.METHODS: The experiment was carried out Beijing Neurosurgery Institute from October 2005 to June 2006. ①Establishment of three-dimensional FEM: Integrating the anatomical structure from the spine CT and MRI image of a patient, a novel three-dimensional geometric model of lumbar functional spinal units (FSUs) has been built. Meanwhile, 90 serial sections were obtained to exchange data of CT sections and divide imagings. Based on the geometric model, two kinds of three-dimensional FEM of L1-L2 segments for preoperative and postoperative vertebrae were created. ② Model evaluation: The lcad of (500 N, 1 000 N, 1 500 N, 2 000 N, 2 500 N) axial compression were applied to the superior surface of the model in the form of a uniformly concentrated lcad over all L1 superior surface nodes respectively. We could observe the stress distribution of L1-L2 segment by applying the load and clue on the high stress concentration region as the most likely areas fracture.MAIN OUTCOME MEASURES: ① Changes of displacement, stress and strain distributions of FEM at L1-L2 segment of lumbar vertebrae under various loads; ② Effect of increase of bone cement volume on displacement, stress and strain distribution.RESULTS: ① The increase in displacement, stress and strain of FE model with the increase of loading in the postoperarive cases. The tendency was approximately linear which also illustrates the spine have flexible biomechanical characteristics. The region was a common place for injures due to loading. The magnitude of stress in the intervertebral disc depended on the proportion of load applied to the superior surface of the motion segment. The heavier the lcad was, the stronger the stress was. ② With the increase of stress on intervertebral disc, the increasing volume of bone cement could induce transfusion of load of nearby vertebral body.CONCLUSION: Building three-dimensional FEM of L1-L2 segments for preoperative and postoperative PVP can explain three-dimensional physiological status of vertebral body based on calculating relative shift of L1-L2 segment of lumbar vertebrae. Meanwhile, simulative calculation can clearly express distribution of stain and stress and preoperative and postoperative deformity of vertebral body.

Objective: To discuss the influence of the dialysate conductivity of Several of the most common situation,and the method of disposition. Methods:To analyze the composition of each ion in the dialysate, the content of various components;The role of dialysate in the treatment process. Results:Affect the dialysate conductivity will directly affect the quality of dialysis and the safety of dialysis, it must be strictly monitored. Conclusion:In the daily inspection work, we should grasp the key and requirements about dialysate conductivity.

Objective To systematically evaluate the safety and effectiveness of interventional uterine artery embolization (UAE) in treating symptomatic uterine fibroids by comparing it with surgical therapy. Methods Computer retrieval of the Cochrane Library, PubMed, EMbase, Web of Science, China National Knowledge Internet (CNKI), Wanfang data, etc. was conducted. The retrieval time was from the inception to July 2014. The academic papers that were related to the randomly controlled test (RCT) of UAE and surgical treatment for symptomatic uterine fibroids were collected, and the reference literatures were also searched for. Two reviewers screened the literatures according to the inclusion and exclusion criteria, the useful data were extracted and the qualities were evaluated. Meta-analysis was performed by using RevMan 5.2 software. Results A total of 6 RCTs were finally obtained, including 732 patients in total. Meta-analysis indicated that both the hospitalization time and recovery time in UAE group were shorter than those in surgery group. No significant differences in health -related quality of life, patient’s satisfaction, intra -operation complications, the recurrence rate and main complications within one year existed between UAE group and surgery group; while the differences in the incidence of minor complications within one year and the need of further intervention rate during 2 -5 years were statistically significant, the occurrence of these minor complications in UAE group being higher than that in the surgery group. The pregnancy rate and live-birth rate in UAE group were significantly lower than those in the surgery group. Conclusion Compared with surgery, UAE has many advantages, such as technically-safe, excellent therapeutic effect, simply-manipulated, easy-nursing, mini-invasive, quick-recovery and easily-accepted by patient, etc. although there is risk of receiving intervention treatment again. The influence of UAE on the fertility, the influence of different embolic agents on the therapeutic effect of UAE, and the effectiveness of UAE for multiple uterine fibroids need to be further studied.

Objective To investigate the MSCT(multi-slice computed tomography) manifestation of different kinds of malignant tumor in Renal Sinus.Methods MSCT data of 31 patients with diferent kinds of malignent tumor in Renal Sinus were analyzed retrospectively.Results In our series,15 cases were renal pelvic carcinoma,and central mass in renal sinus with light or middle ehancement were revealed in their MSCT investigation,as well as pelvic filling defect and hydronephrosis to some extent were found in secretory phase of enhanced MSCT.10 cases were renal cell carcinoma with renal sinus invasion,and their MSCT muti-planar reconstruction showed the mass mainly located in renal parenchymal,with dramatical and heterogenous CT enhancement mostly,besides local oppression & latral destruction of pelvic wall were caused by renal pelvic invasion.2 cases leiomyosaocoma in renal sinus were big and had a sharp edge,after adminisration they demonstrated dramatical and heterogenous CT enhancement.3 cases were lymphnode metastasis located in renal sinus or renal gate,appeared as nodular lesion with CT enhancement,and hydronephrosis could be exsisted if renal pelvic were obstructed.1 case were retroperitoneal lymphoma,MSCT muti-planar recon-struction revealed a large retroperitoneal mass derectly invaded into renal sinus,with light or middle homogenous ehancement.Conclusion MSCT has advantages of high speed scan,excellent discrimination,and aplenty post-process technique,and is of diagonotic value to malignant tumor in renal sinus.