Obiective To discuss the diagnosis value, limitations and mutual complement of MRI and TDUI in the fetus. Methods, TDUI and MRI was performed in 24 cases pregnant women that suspected fetus congenital malformation by Ultrasound examination, the examination results were compared by MR1 and TDUI with the clinical results.Results The 9 cases congenital malformation of 24 cases pregnant women were found by MRI. The 9 cases were confirmed and 3 cases were more sufficient by MRI. The one case examined by MRI was normal other than Ultrasound examination. Conclusion MRI is superior to Ultrasound in diagnosing malformation of nervous system. The Ultrasound and the TDUI in particular is better in finding the surface malformation than MRI. In clinical application, MRI and Ultrasound must be connected to make up the limitation and have a definite diagnosis.

Objective:To study the CT and PET/CT features of pleural mesothelioma and the value of CT and PET/CT imaging in the diagnosis of the disease.Methods:We retrospectively analyzed the spiral CT images of 23 patients and PET/CT images of 7 patients with pleural mesothelioma,all histologically confirmed.Results:Of the 23 cases detected by spiral CT,7 were benign and 16 malignant;local nodular pleural thickening was found in 9 cases,7 benign and 2 malignant;diffuse pleural thickening was observed in 14 cases,all malignant.Of the 7 cases diagnosed by PET/CT,5 were excluded from surgery.Conclusion:CT imaging helps determine the location,shape,extent of the pleural lesion and its relation to the surrounding tissues,while PET/CT is better in the differentiation of pleural mesothelioma and staging of malignancy,and therefore plays an important guiding role in the treatment of the disease.

Objective: To discuss the imaging features of esophageal fistula and the value of intervention.Methods: We retrospectively analyzed the complete clinical data of 12 cases of esophageal fistula treated from June 2000 to May 2008,of whom,2 developed esophago-thoracis fistula and esophago-mediastinum fistula respectively after conservative radiotherapy,and 10 developed esophageal fistula after surgery for esophageal cancer.All the patients received iodine-based oral contrast,spiral CT scanning and intraperitoneal stent implantation for fistula closure.Results: Iodine-based oral contrast showed that the contrast agent overflowed into the chest in 8 cases,into the airway in 3 and into the mediastinum in 1.Spiral CT scanning revealed 8 cases of pleural fistula and 2 cases of remnant stomach-airway fistula,but failed to display the other 2 because of the small size.Intraperitoneal stent implantation was successfully accomplished in all the cases,which helped to close the fistula,take in food,stop bucking,control lung,mediastinum and other infections,and improve the patients' quality of life.Conclusion: Esophageal fistula can be effectively diagnosed based on the findings of iodine-based oral contrast and spiral CT scanning.As a novel technique,intraperitoneal stent implantation for fistula closure,simple,safe and with obvious immediate effect,is well worth promoting.

Objective:Percutaneous fluoroscopic gastrostomy(PFG) is an alterative method for the patients who were not suitable for percutaneous endoscopic gastrostomy(PEG) and stent.This is a study to report the clinical experience of PFG in 25 patients. Methods:Twenty-five patients could not have oral intake due to obstruction of the oesophagus and depended on long-term parenteral nutrition.They contraindicated for percutaneous endoscopic gastrostomy.Results:The procedures all were successful completed without complication.The patients could use home enteral nutrition and get rid of parenteral nutrition.The patients' quality of life was improved significantly.Conclusion:PFG is a useful,convenient and less complication method for patients who are contraindication for PEG.

Objective To discuss magnetic resonance fat suppression technique,such as Chemical Shift Selective and Short TI Inversion Recovery Sequence,and its clinical value.Methods 73 cases undergoing MRI fat suppression during March 2008 to July 2008 were adopted as the subjects,with such site examined respectively as the skull,basalis,nasopharynx,neck,bones and joints as well as abdominal pelvis.Comparative study of image quality was performed to determine the di-agnostic value of MRI fat suppression technique.Results Of the all cases,7 ones suffered from skull lesions,6 ones from eye diseases,11 ones from abdominal pelvic diseases,4 ones from liver diseases,4 ones from pancreas disorders,and 8 ones from pelvic diseases.Meanwhile,of 10 cases of basalis diseases,there were 8 ones of nasopharyngeal carcinoma and 2 ones of oropharynx disorder.Of 16 cervical disorders,there were 6 ones of neurogenic tumor,3 ones of leucoma,5 ones of metastatic tumor and 2 ones of lipoma.Of 15 cases of vertebral disorders and osteoarthropathia,there were 8 ones of bone contusion,3 ones of metastatic tumor,3 ones of angeioma and 1 case of lipoma.Fat suppression technique,with the lesion edge outlined clearly and the lesions containing adipose tissue identified,provided more information than regular MRI.Conclusion The fat-suppression technique can significantly improve image quality,enhance disease diagnosis rate,and thus is an important technology in MRI examination.

Objective To investigate collagen Ⅳ and matrix metalloproteinase-2 (MMP-2)expression in intimal hyperplasia(IH) in rat vein grafts. Methods Vein graft model was constructed in rats. At day 3,week 1,2,4,8 and 12 after surgery,vein grafts were obtained and examined by HE and Verhoeff stains. The thickness and area ratio of intima/media were measured. The positive cells of 5′-Brdu were detected to indicate SMC proliferation. The positive ratio of collagen Ⅳ and MMP-2′s protein and mRNA were calculated. Results The neointima was found at 1 week post-operation. The maximal IH occurred at 2 to 4 week. The similar tendency was observed in the positive cells of 5′-Brdu. Collagen Ⅳ was on the decrease at 1 week and negative from 2 to 8 week ( P

Objective To analyze the syphilis epidemic characteristics and trends of Yongchuan District during 2010? 2015 to provide a basis for formulating the prevention and control strategy of syphilis.Methods The data of syphilis cases reported in Yongchuan District of Chongqing City during 2010-2015 were arranged,checked anal statisticallyanalyzed.Results The incidence rate of syphilis showed a reverse U type change trend from rising to declining,latent syphilis accounted for the highest proportion,congenital syphilis cases were decreased year by year.The analysis results showed that the constituent ratio of latent syphilis and congenital syphilis had statistical difference between 2010-2013 and 2014-2015(P＜0.05);syphilis high prevalent area was concentrated at the city and town area,while prevalence rate was slower in rural area.Most of syphilis patients were concentrated in the age group of 25-45 years old.There was no difference between women and men;syphilis cases generally had lower educational level,majority concentrated at the population of junior high school or below;the occupations in the syphilis patients were concentrated at the entertainment personnel,followed by migrant workers.Conclusion The incidence rate of syphilis is changed from rising to smoothly and steady decreased.It is necessary to adopt the pertinent prevention and control measures for the high-risk population.

Objective: To investigate the effect of inhibitng C-myc expression by actinomycin D on intimal hy-perplasia in vein graft. Methods: The vein graft model was established in rats. The different dises of actinomycin D (0.015 mg/kg; 0.15 mg/kg) were given just before and after operation. The vein grafts were harvested at 2 hrs and 1 week after grafting. C-myc mRNA was measured by in situ hybridization method. The intimal thickness was measured using a computerised image analysis system. Results: The expression of C-myc mRNA and the intimal thickness were both significantly reduced in large dose (0.15 mg/kg) group of actinomycin D, with 6.5%; 18.7 μm compared with control group in 12.5%; 28.5 μm respectively. Conclusion: Actinomycin D can inhibit expression of C-myc mRNA and intimal hyperplasia in graft. Expression of C-myc plays an important role in inducing proliferation of smooth muscle cell in vein graft.

BACKGROUND: BACKGROUND: Studies have found that surface treatment agents containing 10-methacryloyloxy decyl dihydrogen phosphate may be chemical y bonded to the oxide on the surface of zirconia, thereby notably improving the bonding performance of zirconia. OBJECTIVE: To study the effects of Mondbond N and Single bond Universal Adhesive on microtensile bond strength between zirconia and composite resin. METHODS: Sixty pieces of zirconia were randomized into three groups: in group 1, conventional Bis-GMA resin cement was used to bond zironia and composite resin; in group 2, conventional Bis-GMA resin cement was used to bond zironia and composite resin fol owing Mondbond N treatment; in group 3, conventional Bis-GMA resin cement was used to bond zironia and composite resin fol owing surface treatment with Single Bond Universal Adhesive containing 10-methacryloyloxy decyl dihydrogen phosphate. Microtensile bond strength and microstructure on the bonding interface were compared among three groups. RESULTS AND CONCLUSION: (1) Microtensile bond strength was significantly higher in the groups 2, 3 than group 1 (P < 0.05), and there was no difference between the two former groups. (2) Scanning electron microscope observation of the bonding interface: before microtensile test, there were more fissures on the bonding interface of group 1; in the group 2, there were a few fissures on the bonding interface that was relatively even; in the group 3, the bonding interface was smooth and continuous with few fissures. After microtensile, cohesive failure and bonding interface failure were mainly seen in the three groups, but there was no simple interface failure in the groups 2 and 3. These findings indicate that Monobond N and Single Bond Universal Adhesive can both improve the bonding strength of zirconia with composite resin.

Objective Non-contrast enhanced magnetic resonance angiography ( MRA) has become the focus of research at home and abroad .The aim of the article was to optimize the scan parameters of renal artery with inflow-sensitive inversion recovery ( IF-IR) MRA. Methods 30 cases of renal artery patients into two groups were collected from December 2013 to May 2014 in our hospi-tal.They were divided into stenosis group(n=12) and non-stenosis group(n=48).IFIR-MRA sequences were carried out on each patient by using various BSP-TI with 1200,1300 and 1400 ms, all other parameters were identical .The image signal to noise ratio, a renal artery branch and venous artifact were evaluated by two experienced radiologists , and the best BSP-TI was obtained from different groups. Results BSP-TI=1400 ms was optimal for renal artery stenosis group while 1200 ms was the most suitable for non-stenosis group. Conclusion IFIR-MRA of renal artery can achieve better image quality of renal artery and its branches and it is feasible in clinical routine practice , especially for those patients with renal insufficiency .