BACKGROUND Helicobacter pylori(H.pylori)is a spiral-shaped bacterium responsible for the development of chronic gastritis,gastric ulcer,gastric cancer(GC),and MALTlymphoma of the stomach.H.pylori can be present in the...BACKGROUND Helicobacter pylori(H.pylori)is a spiral-shaped bacterium responsible for the development of chronic gastritis,gastric ulcer,gastric cancer(GC),and MALTlymphoma of the stomach.H.pylori can be present in the gastric mucosa(GM)in both spiral and coccoid forms.However,it is not known whether the severity of GM contamination by various vegetative forms of H.pylori is associated with clinical and morphological characteristics and long-term results of GC treatment.AIM To establish the features of H.pylori infection in patients with GC and their correlations with clinical and morphological characteristics of diseases and long-term results of treatment.METHODS Of 109 patients with GC were included in a prospective cohort study.H.pylori in the GM and tumor was determined by rapid urease test and by immunohistochemically using the antibody to H.pylori.The results obtained were compared with the clinical and morphological characteristics and prognosis of GC.Statistical analysis was performed using the Statistica 10.0 software.RESULTS H.pylori was detected in the adjacent to the tumor GM in 84.5%of cases,of which a high degree of contamination was noted in 50.4%of the samples.Coccoid forms of H.pylori were detected in 93.4%of infected patients,and only coccoid-in 68.9%.It was found that a high degree of GM contamination by the coccoid forms of H.pylori was observed significantly more often in diffuse type of GC(P=0.024),in poorly differentiated GC(P=0.011),in stage T3-4(P=0.04)and in N1(P=0.011).In cases of moderate and marked concentrations of H.pylori in GM,a decrease in 10-year relapse free and overall survival from 55.6%to 26.3%was observed(P=0.02 and P=0.07,respectively).The relationship between the severity of the GM contamination by the spiral-shaped forms of H.pylori and the clinical and morphological characteristics and prognosis of GC was not revealed.CONCLUSION The data obtained indicates that H.pylori may be associated not only with induction but also with the progression of GC.展开更多
This paper gives the strict solution of optical field equation in the optical waveguides with parabolic profiles. It shows that the photons in the non-uniform optical waveguide propagate along z-axis in spiral form, j...This paper gives the strict solution of optical field equation in the optical waveguides with parabolic profiles. It shows that the photons in the non-uniform optical waveguide propagate along z-axis in spiral form, just like a charged particles moving in the magnetic field. Only in the step-index waveguides, it can the photons propagate in ziging form.展开更多
BACKGROUND: The accurate measurements of various data of the bone diameters of foramen ovale of living person can change the methods of puncturing trigeminal gasserian ganglion via foramen ovale for treating trifacia...BACKGROUND: The accurate measurements of various data of the bone diameters of foramen ovale of living person can change the methods of puncturing trigeminal gasserian ganglion via foramen ovale for treating trifacial neuralgia from the experience of puncture operator only to puncture by taking the objective data of measurement as the evidence, which is good for improving the accuracy of puncturing trigeminal ganglion and reducing side effects. OBJECTIVE : To observe the forms of foramen ovales in healthy adults displayed by volume rendering and multi-planar reconstruction after three-dimensional spiral CT thin-slice scan of skull base, and measure the longitudinal diameter and transverse diameter. DESIGN : A repetitive observation and measurement SETTINGS : Department of Neurosurgery and Department of Medical Imaging, Foshan Hospital of Traditional Chinese Medicine. PARTICIPANTS: Fifty healthy adults (100 sides), who were examined with three-dimensional spiral CT scan, were randomly selected from the Department of Medical Imaging, Foshan Hospital of Traditional Chinese Medicine from January 2005 to January 2006, including 26 males and 24 females, aged 25-68 years with an average of 48 years old. They were all informed and agreed with the examination. METHODS : The subjects were examined with the Philips 16-slice spiral CT-Mx 8000 IDT CT apparatus (Philips Company, Holland), the scanning ranged from 2 cm below the canthomeatal line to the level of suprasellar cistem. The width of collimator was 0.75 mm, pitch was 0.663; tube current was 350 mA, voltage was 120 kV, resolution was 512×512 matrix; slice thickness of reconstruction was 1 mm, and interval was 0.5 mm. After the three-dimensional spiral CT thin-slice scan of skull base, the image post-processing techniques including volume rendering and multi-planar reconstruction were applied to observe the forms of foramen ovales, and measure the size, longitudinal diameter and transverse diameter of the foramen ovales. The figures of the foramen ovales were drawn with mouse along the boundary of bone porous margin and soft tissue. According to the indications, the diameters were measured with computer to observe the forms of foramen ovales. MAIN OUTCOME MEASURES : The longitudinal diameter, transverse diameter and form of foramen ovales were observed. RESULTS: All the 50 healthy adults (100 sides) were involved in the analysis of results. (1) It was observed in the volume rendering images that foramen ovales had four forms of oval shape (77 sides), kidney shape (12 sides), round shape (7 sides), ribbon shape (4 sides). (2) The longitudinal diameters of left and right foramen ovales were (7.67±1.32) and (7.98±1.45) mm, and the transverse diameters were (4.04±0.83), (4.09±1.07) mm; There was no obvious difference between left and right longitudinal diameters (t = 1.63, P = 0.11 ), and left and right transverse diameters were close (t = 0.45, P= 0.65). CONCLUSION : The non-invasive techniques of volume rendering and multi-planar reconstruction after three-dimensional spiral CT thin-slice scan can clearly display the formand size of foramen ovale in healthy adults.展开更多
文摘BACKGROUND Helicobacter pylori(H.pylori)is a spiral-shaped bacterium responsible for the development of chronic gastritis,gastric ulcer,gastric cancer(GC),and MALTlymphoma of the stomach.H.pylori can be present in the gastric mucosa(GM)in both spiral and coccoid forms.However,it is not known whether the severity of GM contamination by various vegetative forms of H.pylori is associated with clinical and morphological characteristics and long-term results of GC treatment.AIM To establish the features of H.pylori infection in patients with GC and their correlations with clinical and morphological characteristics of diseases and long-term results of treatment.METHODS Of 109 patients with GC were included in a prospective cohort study.H.pylori in the GM and tumor was determined by rapid urease test and by immunohistochemically using the antibody to H.pylori.The results obtained were compared with the clinical and morphological characteristics and prognosis of GC.Statistical analysis was performed using the Statistica 10.0 software.RESULTS H.pylori was detected in the adjacent to the tumor GM in 84.5%of cases,of which a high degree of contamination was noted in 50.4%of the samples.Coccoid forms of H.pylori were detected in 93.4%of infected patients,and only coccoid-in 68.9%.It was found that a high degree of GM contamination by the coccoid forms of H.pylori was observed significantly more often in diffuse type of GC(P=0.024),in poorly differentiated GC(P=0.011),in stage T3-4(P=0.04)and in N1(P=0.011).In cases of moderate and marked concentrations of H.pylori in GM,a decrease in 10-year relapse free and overall survival from 55.6%to 26.3%was observed(P=0.02 and P=0.07,respectively).The relationship between the severity of the GM contamination by the spiral-shaped forms of H.pylori and the clinical and morphological characteristics and prognosis of GC was not revealed.CONCLUSION The data obtained indicates that H.pylori may be associated not only with induction but also with the progression of GC.
文摘This paper gives the strict solution of optical field equation in the optical waveguides with parabolic profiles. It shows that the photons in the non-uniform optical waveguide propagate along z-axis in spiral form, just like a charged particles moving in the magnetic field. Only in the step-index waveguides, it can the photons propagate in ziging form.
基金a grant fromTackle Key Problems in Sci-ence and Technology of FoshanCity, No. 200505075
文摘BACKGROUND: The accurate measurements of various data of the bone diameters of foramen ovale of living person can change the methods of puncturing trigeminal gasserian ganglion via foramen ovale for treating trifacial neuralgia from the experience of puncture operator only to puncture by taking the objective data of measurement as the evidence, which is good for improving the accuracy of puncturing trigeminal ganglion and reducing side effects. OBJECTIVE : To observe the forms of foramen ovales in healthy adults displayed by volume rendering and multi-planar reconstruction after three-dimensional spiral CT thin-slice scan of skull base, and measure the longitudinal diameter and transverse diameter. DESIGN : A repetitive observation and measurement SETTINGS : Department of Neurosurgery and Department of Medical Imaging, Foshan Hospital of Traditional Chinese Medicine. PARTICIPANTS: Fifty healthy adults (100 sides), who were examined with three-dimensional spiral CT scan, were randomly selected from the Department of Medical Imaging, Foshan Hospital of Traditional Chinese Medicine from January 2005 to January 2006, including 26 males and 24 females, aged 25-68 years with an average of 48 years old. They were all informed and agreed with the examination. METHODS : The subjects were examined with the Philips 16-slice spiral CT-Mx 8000 IDT CT apparatus (Philips Company, Holland), the scanning ranged from 2 cm below the canthomeatal line to the level of suprasellar cistem. The width of collimator was 0.75 mm, pitch was 0.663; tube current was 350 mA, voltage was 120 kV, resolution was 512×512 matrix; slice thickness of reconstruction was 1 mm, and interval was 0.5 mm. After the three-dimensional spiral CT thin-slice scan of skull base, the image post-processing techniques including volume rendering and multi-planar reconstruction were applied to observe the forms of foramen ovales, and measure the size, longitudinal diameter and transverse diameter of the foramen ovales. The figures of the foramen ovales were drawn with mouse along the boundary of bone porous margin and soft tissue. According to the indications, the diameters were measured with computer to observe the forms of foramen ovales. MAIN OUTCOME MEASURES : The longitudinal diameter, transverse diameter and form of foramen ovales were observed. RESULTS: All the 50 healthy adults (100 sides) were involved in the analysis of results. (1) It was observed in the volume rendering images that foramen ovales had four forms of oval shape (77 sides), kidney shape (12 sides), round shape (7 sides), ribbon shape (4 sides). (2) The longitudinal diameters of left and right foramen ovales were (7.67±1.32) and (7.98±1.45) mm, and the transverse diameters were (4.04±0.83), (4.09±1.07) mm; There was no obvious difference between left and right longitudinal diameters (t = 1.63, P = 0.11 ), and left and right transverse diameters were close (t = 0.45, P= 0.65). CONCLUSION : The non-invasive techniques of volume rendering and multi-planar reconstruction after three-dimensional spiral CT thin-slice scan can clearly display the formand size of foramen ovale in healthy adults.