Objective To analyze multislice CT characteristics of intestinal obstruction transition zone caused by different patholo-gy.Methods 67 cases of intestinal obstruction were collected in our hospital.Multislice spiral CT scan combined with multi-plane re-organization (MPR)of the bowl obstruction transitional zone were analysed.Results Among 67 cases of intestinal obstruction,there were 28 cases of simple mechanical intestinal obstruction,1 7 cases adhesion intestinal obstruction,5 cases paralytic intestinal obstruc-tion,4 cases internal hernias and 4 cases mixed intestinal obstruction.Conclusion Intestinal canal transitional zone and arounding tis-sues of intestinal obstruction have certain characteristics for the same pathology which can be clearly displayed by multislice CT scan combined with MPR.

A paper similarity network was constructed in light of semantic similarity algorithm using the complex network processing package , igraph in R language , and analyzed by random walk-trap algorithm , label propagation algorithm, BGII algorithm, and Girvan-Newman algorithm, respectively.The accuracy and stability of these 4 al-gorithms were compared according to the golden standards and the D function for network community classification evaluation index, which showed that the accuracy and stability of random walk-trap algorithm were better than those of the other 3 algorithms and preconditioning of complex network was an important influencing factor for clustering .

Esophageal Diseases ; Humans ; Medicine ; Tracheal Diseases

Child ; Humans ; Laryngostenosis ; diagnosis ; therapy ; Tracheal Stenosis ; diagnosis ; therapy

Aged ; Ear, Middle ; Eustachian Tube ; Female ; Foreign Bodies ; Humans

Object High overlap of data window is essential to improve axial resolution in elastogaphy.However, correlated errors in displacement estimates increase dramatically with the increase of the overlap, and generate the so-called "worm" artifacts. This paper presents a wavelet shrinkage de-noising in strain estimates to reduce the worm artifacts at high overlap. Methods Each of axial strain A-lines was decomposed using discrete wavelet transformation up to 3 levels. The high frequency components of every levels of wavelet coefficients were quantified by using soft threshold function according to different adaptive thresholds. Then the discrete wavelet reconstruction were performed to produce a wavelet shrinkage denoised strain line. Results The simulation results illustrated that the presented technique could efficiently denoise worm artifacts and enhance the elastogram performance indices such as elastographic SNRe and CNRe. Elastogram obtained by wavelet denoising had the closest correspondence with ideal strain image. In addition, the results also demonstrated that wavelet shrinkage de-noising applied in strain estimates could obtain better image quality parameters than that apphed in displacement estimates. The elastic phantom experiments also showed the similar elastogram performance improvement. Conclusion Wavelet shrinkage de-noising can efficiently denoise the worm artifacts noise of elastogram and improve the performance indices of elastogram while maintaining the high axial resolution.

Objective To study the identification method of Akebia trifoliata(Thunb.) Koidz. by Fourier Transform Infrared (FTIR) Spectroscopy. Methods FTIR Spectroscopy was measured of Akebia trifoliate collected from different production areas. Results At the range of 737-1032cm-1, the Spectroscopy of Akebia trifolia of different production areas showed variances in peak value of infrared absorption, peak position, peak shape and peak strength, which can be regarded as identification evidence for Akebia trifoliate. Conclusion This mehthod is rapid, reliable, simple and effective. FTIR can be used as the identification index for Akebia trifoliate.

[Objective]To evaluate a preliminary outcome of volar surgical treatment of dorsally displaced fractures of distal radius with open reduction and internal fixation with T shape locking compression plate(TLCP).[Method]From Sept.2003 to Nov.2005,9 cases with dorsally unstable distal radius fractures were treated with open reduction and internal fixation with T-LCP.This study involved 3 males and 6 femals with an average age of 63.5 years(ranged from 52 to 74 years old).According to AO classification: 2 cases of types B2;1 case of type B3;2 cases of type C1;3 cases of type C2;1 case of type C3,all of them were closed fractures of distal radius.The fractures of 9 cases were fixated with T-LCP by volar approach and dorsal soft tissues were not dissected during the operation.The Osteosets and the artificial bone substitute were implanted into bone defects if they were large enough.[Result]Nine cases were followed up for 6 to 17 months and the average time was 10.7 months.The X-ray pictures showed that unions have been achieved in all patients and a mean healing time was 7 weeks.The Osteosets were implanted into large bone defects in one case.No complication was found as infection,non-union,loosing of nails,syndrome of wrist,and medium neuritis.The functional recovery was achieved from 6 to 29 weeks with an average time of 12.5 weeks after operation.Passive wrist motion,active finger motion and forearm rotation were encouraged immediately after surgery.Active wrist motion was suggested in 7 days postoperatively.The clinical outcomes were evaluated according to modified Mcbide grading system.There were 7 excellent,1 good and 1 fair,the satisfactory rate was 88.9%.[Conclusion]The volar fixation of T-LCP for dorsally displaced fractures of distal radius has a good clinical outcome.It allows the patients to begin early exercise.

Objective To investigate calcification of cultured aortic medial cells in vitro and acceleration by 25 hydroxycholesterol or ? glycerophosphate. Methods Aortic medial cells were obtained by explantation, and the calcification was observed by von Kossa staining. Insoluble calcium precipitation in cellular layer was determined by biochemical method , and osteocalcin in the media was analyzed with radioimmunoassay. Results Two different types of primary cells were shown from culture: one with parallel cellular growth and being negative by von Kossa staining, the other cell type formed cellular nodules with positive von Kossa staining. After 28 days of cell passages, cell growth appeared no nodule formation. However, many cellular nodules and positive von Kossa staining were observed in the passaged cells treated with 25 hydroxycholesterol or ? glycerophosphate, and both insoluble calcium 〔(57 80?18 50)?g/pool, (67 50?15 30)?g/pool〕and osteocalcin 〔(0 886?0 063)?g/L, (0 895?0 061)?g/L〕in the medium were significantly increased than that of the untreated cells. Conclusions Cultured aortic medial cells could be divided into two subtypes, one with the characters of smooth muscle cells, the other with the micro vascular pericytes which could calcify the extracellular matrix. 25 hydroxycholesterol and ? glycerophosphate promoted the in vitro calcification, and osteocalcin secretion was increased in the process of calcification of aortic medial, suggesting that osteocalcin might participate in the aortic calcification.

Objective To establish a method for rapid determination of nitrate in air. Methods Nitrate in air was absorbed using Na2CO3-NaHCO3 solution and the content of nitrate in the absorption liquid was determined by ion chromatography. Results The detection limit of NO3- was 0.008 mg/m3 when the sampling volume of air was 100 L. The linear correlation coefficient was 0.999 6. The relative standard deviation of the method was less than 5% and the recovery rates was 92.0%-96.7%. Conclusion The method had good selectivity and was simple and rapid for the determination of nitrate in air.