Objective To discuss the application value of diffusion weighted imaging(DWI)in the diagnosis and treatment of synovial sarcoma.Methods 48 patients with synovial sarcoma were selected.All patients were given conventional magnetic resonance imaging (MRI)and DWI detection examination,DWI diffusion sensitive factor examination was 500 s/was(b).All the patients'imaging results and disease detection were analyzed.ROC curve was used to analyze the value of DWI,MRI examination in the diagnosis of synovial sarcoma.Results DWI examination detection of synovial sarcoma was much higher than that of MRI,the difference was statistically significant(χ2 =5.62, P <0.05).ROC curve analysis showed that MRI examination in the diagnosis of synovial sarcoma specificity was 72.58%,sensitivity was 79.12%,the accuracy was 86.82%,DWI examination in the diagnosis of specificity was 76.81%,sensitivity was 85.79%,the accuracy was 95.18%.The sensitivity,specificity and accuracy of DWI were significantly higher than conventional MRI,the differences were significant(χ2 =5.72,5.68,5.12,all P <0.05). Conclusion DWI can effectively improve the detection rate of synovial sarcoma,and has higher diagnostic sensitivity, specificity and accuracy,it's conducive to the physician for treatment in a timely manner,and worthy of further clinical promotion.

Objective To analyse the diagnosis and treatment of the single tubular type of diastematomyelia. Methods Clinical scoring and posterior tibial nerve cortical somatosensory evoked potential (PTNCSEP) were performed in 23 cases to define surgical indications and investigate the results of treatment. Results Seven cases without clinical symptoms and 11 cases without progressive neural deficit showed no significant change in terms of clinical scoring and PTNCSEP P40 latent period; while other 5 cases with progressive neural deficit improved after the surgical intervention, and operative findings confirmed that there were fibrous septum or band and other malformations. Conclusion Patients with progressive neural deficit need surgical intervention while those without progressive neural deficit and clinical symptoms only need conservative treatment and routine follow-up.

BACKGROUND: It has been reported that magnesium sulfate(Mg2SO4)treatment has a satisfactory effect on brain ischemia-reperfusion injury, but its effect on spinal cord ischemic injury remains unclear.OBJECTIVE: To evaluate the effects of intravenous administration of Mg2SO4 on spinal cord ischemia-reperfusion injury and further probe into its mechanism.DESIGN: Randomized controlled repeatedly measuring design based on the experimental animals.SETTING: Central research laboratory of a university hospital.MATERIALS: The experiment was conducted in the Central Research Laboratory, Medical College of Xi' an Jiaotong University from April 2003 to June 2004. Twenty-seven New Zealand white rabbits with body mass of 1.9to 2. 5 kg were included. The rabbits were randomly divided into Mg2SO4group, normal saline group and sham-operation group with 9 rabbits in each group.METHODS: The lower segment of the kidney under abdominal aorta was occluded for 30 minutes and 48-hour reperfusion was performed to establish ischemia-reperfusion model of lumbosacral segment of spinal cord. Mg2SO4group (Group A, n = 9) received Mg2SO4 at the dose of 0. 25 mL/kg per hour throughout this procedure; the same volume of saline solution was used in normal saline group(Group B, n=9) . Animals of sham-operation group (Group C, n = 9) were anesthetized and received laparotomy without aortic occlusion. The somatosensory evoked potential(SEP) was detected before ischemia, 30 minutes after ischemia, and 1, 2, 8, 16 and 24 hours after reperfusion. Motor function score was assessed in Mg2SO4 and saline groups 24 and 48 hours after reperfusion. After reperfusion for 48 hours, the animals were killed and histopathological test was performed on the spinal cord.MAIN OUTCOM MEASURES: Motor function score, SEP monitoring and spinal histopathological test.RESULTS: The latency of SEP(Nt) was markedly longer 30 minutes after ischemia in Mg2SO4 group. It was obviously recovered during the first two hours after reperfusion compared with during ischemia, but was obviously prolonged after that. Waveform disappeared 30 minutes after ischemia in normal saline group. SEP amplitudes and latencies in sham-operation group did not change remarkably during the procedures and all the animals recovered without neurological deficits. At each reperfusion time point, the recovery of SEP(N1) latency was better in Group A than that in Group B( P ＜ 0.05). The average motor function score at 24 hours and 48 hours after reperfusion was significantly higher in Group A[ (3.7 ±0.5) and(3.4 ±0.7) points] than that in GroupB [(3.0±0.7) and (2.6±0.9) points](P ＜0.05). The normal nerve cell counting of spinal cord 48 hours after reperfusion in Mg2SO4 group(23. 4 ± 3. 4) was significantly higher than that in saline group (12.3 ±3.2)(P ＜ 0.01).CONCLUSION: Intravenous Mg2SO4 administration may reduce spinal cord injury and preserve neurological function in transient spinal cord ischemia in rabbits.

In order to monitor the emotional state changes of audience on real-time and to adjust the music playlist, we proposed an algorithm framework of an electroencephalogram (EEG) driven personalized affective music recommendation system based on the portable dry electrode shown in this paper. We also further finished a preliminary implementation on the Android platform. We used a two-dimensional emotional model of arousal and valence as the reference, and mapped the EEG data and the corresponding seed songs to the emotional coordinate quadrant in order to establish the matching relationship. Then, Mel frequency cepstrum coefficients were applied to evaluate the similarity between the seed songs and the songs in music library. In the end, during the music playing state, we used the EEG data to identify the audience's emotional state, and played and adjusted the corresponding song playlist based on the established matching relationship.
Algorithms ; Electrodes ; Electroencephalography ; Emotions ; Humans ; Music ; Software

Objective To observe the anatomic landmarks in the thoracic cavity under thoracoscope in procedures for scoliosis,so as to facilitate the intraoperative localization and the prevention of complications. Methods During 23 cases of thoracoscopic anterior procedure,anatomic landmarks,including the segmental vessels,azygous vein,intervertebral discs,rib heads and great splanchnic nerve,were observed. Results The segmental vessels of T 6～10 were situated at the center of the vertebral body and their position was relatively constant.The T 7～10 intervertebral discs were a little bit prominent and white-colored,which were easily distinguished.The rib heads corresponding to their vertebral bodies were good landmarks.The great splanchnic nerve crossed over the T 7～9 vertebral bodies arrisways. Conclusions With the assistance of anatomic landmarks,accurate localization of the vertebral body is possible,which is helpful to the prevention of spinal cord injury and the decrease of frequency of radiation exposure.

Objective To set up an antibody-capture ELISA method to detect the Japanese encephalitis virus(JEV)antibody.Methods ELISA plate was coated with the monoclonal antibody which was specific to the envelope protein epitope E39 of JEV,JEV SA14-14-2 strain as the source of antigen was used to absorb the monoclonal antibody,the absorbed virus used to capture the JEV'S antibody.The antibody that captured ELISA was established.The indirect ELISA method using the virus particles from cell culture was compared with coating ELISA plate,105 clinical serum were checked.Results The background in indirect ELISA assay could not be abscised,positive and negative serum diluted in a ratio of 1:10,1:100,1:1000,the relative value of A posative/A negative were 1.02,0.99,1.13,all<2.1.But the antibody-captured ELISA method when the serum dilution was 1:10,1:100,the A posative/A negative were 3.57,2.94,all>2.1;when the dilution was 1:1000,the A posative/A negative was 1.42,<2.1,it meant the method could distinguish the positive and negative serum efficiently when the dilution Was 1:100,the background problem in indirect ELISA assay could be solved.Antibody-capture method was used to check 105 serum samples,the A posative/A negative over a range of 0.257～0.321(0.262±0.050),all<2.1,no positive sample found.Conclusion The antibody-capture ELISA method has been preliminary set up with a high specificity,capable of quickly identifying JEV from other virus.

RAPD analysis of eight soy sauce strains isolated from commercial soy sauce koji was done with random primers,using Aspergillus oryzae AS3.951 and Aspergillus sojae AS3.495 as controls.Six appropriate primers(Primer1,Primer5,Primer6,Primer7,Primer8,Primer9)for RAPD-PCR were screened from nine random primers,and repetitive experiments demonstrated that their RAPD-PCR polymorphic patterns were stable.There were usually 4～8 bands in their RADP-PCR patterns,where the number of the main bands was 1～4 and the secondary bands were abundant.The phylogenetic tree of these strains was reconstructed according to their RAPD-PCR patterns,and it basically corresponded to traditional morphological taxology,demonstrating that the application of RAPD molecular marker in the phylogenetic analysis of soy sauce strains was feasible.

Humans ; Rhinitis, Allergic, Perennial ; Rhinitis, Allergic, Seasonal

Diagnostic Errors ; Female ; Humans ; Middle Aged ; Thyroid Nodule ; diagnostic imaging ; Ultrasonography ; Zenker Diverticulum ; diagnostic imaging

Cerebrospinal Fluid Rhinorrhea ; surgery ; Female ; Humans ; Middle Aged ; Semicircular Canals ; surgery