Objective To study the significance on dynamic changes of serum vascular endothelial growth factor( VECF) and matrix metalloproteinase 9( MMP-9) in patients with acute cerebral infarction. Methods 123 patients with acute cerebral infarction were selected as research object, and they were the observation group, and 80 healthy peoples at the same time were selected as control group. Then the serum VEGF and MMP-9 in patients with acute cerebral infarction after pathogenesis at first,third,fifth,seventh and fourteenth day were detected,and the correction between the levels and infarct size,prognosis were studied. Results The serum VECF and MMP-9 of observation group compared with those of control group,the change showed increased first and decreased afterwards,but the levels were all higher than those of control group (P ＜ 0.01). There were correction between the levels and infarct size, prognosis.The serum VEGF[(369.3 ± 108.7,476.2 ± 118.4,551.5 ± 144.5,661.7 ± 164.6,437.6 ± 123.9)ng/L]and MMP-9[(333.8±101.4,459.7±119.9,370.3 ±119.5,320.5 ± 129.1,255.4 ± 101.6)ng/L] in poor prognosis patients after pathogenesis at first,third,fifth,seventh and fourteenth day were all higher than those of good prognosis patients ( P ＜0.01). Conclusion The serum VEGF and MMP-9 in patients with acute cerebral infarction showed dynamic change,and there was close relationship between the levels and infarct size.

Objective To establish a digital segmentational data set of larynx based on Chinese visible human (CVH). Methods Magnetic lasso and polygon tools of Photoshop were used to segment the small organs and structures of larynx of CVH to establish the segmentational data set of larynx. After conversion of the image format, the segmentational structures were extracted automatically with Thresholding Method and presented 3-D visualized, and then were checked up by its result of 3D reconstruction with Amira 4.1 software. Results Many small structures of larynx were segmentated, such as laryngeal cartilage, laryngeal muscles, vocal cords and so on. Then the segmentational data set of larynx based on CVH was established, which can be used to 3-D reconstruction accurately. Conclusion The segmentational data set of larynx is accurate and integrated, which is helpful to establish the elaborate model of larynx and can provide the method of color image segmentation.

Objective To investigate the degradation of dicalcium phosphate dehydrate-coated Mg-Zn alloy in vivo and bone formation. Methods Left femoral condyles were drilled in 72 New Zealand rabbits, and were randomly divided into experiment group (n＝24, implanted with dicalcium phosphate dehydrate-coated Mg-Zn alloy rods), Mg-Zn alloy control group (n＝24, implanted with Mg-Zn alloy rods) and poly-L-lactide acid rod group (n＝24, implanted with poly-L-lactide acid rods). Serum concentrations of Mg~(2+) were examined 1 d pre-operation, and 1 d, 1 week, 2 weeks, 5 weeks and 10 weeks post-operation in experiment group and Mg-Zn alloy control group. Operation sites were examined by X-rays at 3, 6, 12 and 18 weeks post-operation. After X-ray examination at each time point, 6 rabbits in each group were sacrificed, and subjected to histopathological observation of live and kidney tissues by HE staining. Tissues from condyles of femur were observed by HE staining and 2, 4, 6-trinitrophenol rosein staining, and mineral apposition rate of bone was calculated. Results There was no significant difference in the concentrations of serum Mg~(2+) at each time point between Mg-Zn alloy control group and experiment group (P>0.05). X-ray examination revealed gas emerged near the implants 3 weeks after surgery in Mg-Zn alloy control group. However, there was no obvious histological abnormality in liver and kidney tissues. The mineral apposition rate was higher and the degradation of material was lower in experiment group than those in the other two groups. Conclusion Dicalcium phosphate dehydrate-coated Mg-Zn alloy has a favourable biocompatibility, and degrades more slowly in vivo.

Objective To explore the morphologic features of the biceps reflection pulley through the comparative study of the thin sec -tional anatomy based on the Chinese Visible Human ( CVH) and MRI sectional anatomy of the biceps reflection pulley ,and to provide ima-ging anatomic data for the diagnosis of lesions .Methods The thin slices of sagittal oblique plane and coronal oblique plane by visualization -al reconstruction based on 5 data set of the Chinese visible human ( CVH) were compared with the corresponding MR images from 20 shoulder joints of the normal volunteer individuals with routine MRI ,5 shoulders without abnormalities with MR arthrography .The detailed sectional a-natomy structure of the the biceps reflection pulley was marked from the CVH ,routine MRI and MR arthrography one by one with Photoshop CS2 software.Results The main three components of the biceps reflection pulley including the coracohumeral ligament (CHL),the superior glenohumeral ligament ( SGHL) ,and the long head of the biceps tendon ( LBT) were markedly displayed on the CVH and MRI .The CHL was markedly displayed on the sagittal oblique , using plain MRI .The SGHL was markedly displayed on the CVH , especially in the transverse plane.The LBT was markedly displayed on the CVH ,especially in the coronal oblique plane parallel to the LBT .The biceps reflection pulley was markedly displayed on the sagittal oblique plane with CVH and MR arthrography .The SGHL was perpendicular to the CHL , with T-shaped link anterior to the LBT on the sagittal oblique plane .Conclusion It is complementary for MRI and CVH displaying the components of the biceps reflection pulley .The sagittal oblique plane is the best position for displaying the components and adjacent structures of the bi -ceps reflection pulley ,which provide helpful position mark for the diagnosis of the lesions in the rotator interval .

Objective To evaluate the diagnosis of frozen shoulder with the coracohumeral ligament on the coronal oblique plane with MRI.Methods There were 60 patients(120 shoulder joints)in control group,with 30 males and 30 females,the mean age was 50.5 years old.There were 72 shoulder joints in 72 patients of frozen shoulder group(50 femles and 22 males with a mean age of 53.5 years)with clini-cal evidence and MR imaging evidence of frozen shoulder.These were prospectively analyzed to identify the CHL visualization rate and meas-ure the maximum thickness of the CHL.Results The CHL visualization rate on the coronal oblique plane in the control group was 86.7%(104 /120),and the frozen shoulder group was 87.5%(63 /72),the difference was not significant(P >0.05).The CHL visualization rate on the axial view in the frozen shoulder group was 19.4%(14 /72)and the control group was 24.2%(29 /120),the difference was not signifi-cant(P >0.05).The CHL thickness on the coronal oblique plane (n =63)in the patients with frozen shoulder was (4.37 ±1.71)mm, which was significantly greater than (2.84 ±0.79)mm ofpatients in the control group(n =104),the difference was significant(P <0.001). The CHL thickness on the axial plane(n =14)in the patients with frozen shoulder was (3.93 ±1.49)mm,which was significantly greater than (2.29 ±0.65)mm of patients in the control group(n =29),the difference was significant(P <0.001).Conclusion A thickened CHL is highly suggestive of frozen shoulder,which is 4.37 mm on the coronal oblique plane.