The progress and clinical application of medical image post-processing technology are introduced from the aspects of image preprocessing, image segmentation; registration-fusion and 3D reconstruction. Correlated problems and development trends are put forward.

With growing dependence on picture archiving and communication systems(PACS) for viewing images,a quality assurance program to the condition of workstation displays and image quality guidelines for better cost-efficacy and diagnostic accuracy has become increasingly important.This article analyses and synthesizes the quality control of the PACS phantom workstation mainly from such aspects as the monitor resolution and brightness,the environment degree of illumination,statistics assessment method(ROC curve) and so on.

Objective To explore the clinical significance of cytokeratin(AE1/AE3) immunohistochemical staining in detecting the lymph node micrometastasis of gastric cancer.Methods Immunohistochemical S-P method was used to examine AE1/AE3 in 118 lymph nodes in 64 cases of primary gastric cancer.Results Among 118 lymph nodes,micrometastasis was found in 13 lymph nodes of 8 patients with primary gastric cancer by AE1/AE3 staining.The positive rate of micrometastasis was 12.5% and the positive rate of lymph nodes was 11.02%.The incidence of micrometastasis was related with the depth of invasion,and in the cancer with deep invasion,the positive rate of micrometastasis was higher than that in the cancer with superficial invasion(P

Objective To explore the diagnosis, treatment and prognosis of acute perforation of gnstric cancer. Methods The clinical data of 24 patients with acute perforation of gastric cancer who had been admitted to Guangzhou General Hospital of PLA from July 1996 to December 2008 were retrospectively analyzed. Results Of all patients, 4 were treated by perforation repair, 2 by perforation repair combined with gastrojejunostomy, 11 by palliative subtotal gastrectomy, 2 by radical gastrectomy, and 5 by radical gastrectomy after perforation repair. The mean survival time of patients treated by perforation repair, perforation repair combined with gastro-jejunostomy, partial gastrectomy and radical gastrectomy were (4±5), (6±9), (12±7), and (25±9) months, respectively. Conclusions Early diagnosis and reasonable operation are the keys to decrease the morality and increase life quality for patients who suffered from acute perforation of gastric cancer. Different pathologic stages maybe an important factor in deciding the prognosis.

Objective To evaluate surgical therapy for recurrent rectovaginal fistula.Methods In this study.two patients were treated by endorectal advancement flap repair and one patient was treated by vascular pedicled segment of small bowel.Results All patients were cured and followed up from 4 to 20 months.During the period of follow-up there was no recurrence.Conclusions The procedures and timing of operation are important factors for a successful repair.Both the endorectal advancement flap and patch of intestine provide an effective methods in repairing recurrent rectovaginal fistula.

Objective To evaluate the clinical characteristics of epithelioid trophoblastic tumor (ETT).Methods Six cases of ETT treated in Women's Hospital,School of Medicine,Zhejiang University from 2005 to 2007 were retrospectively analyzed,together with a literature review.Results Six cases of ETT were diagnosed pathologically after surgery.The age of patients ranged from 27 to 46 years.The most common presentation was abnormal vaginal bleeding(5/6).The preceding gestational events were hydatidiform mole in 1 case,abortion in 2 cases,and term delivery in 3 cases.The interval between the preceding gestation and the diagnosis of ETT ranged from 15-48 months.The serum human chorionic gonadotropin(hCG)level was 46-121 147 IU/L.Four cases presented with metastasis,including lung metastasis in all of the 4 cases,liver metastasis in 1 case,and pancreas metastasis in another 1 case.The main therapies were surgery combined with chemotherapy.All of the 6 cases received total abdominal hysterectomy.and 1 case also had lung lobectomy.One ease had a recurrence but refused any treatment again,and was lost to follow up;the therapy of 1 case unfinished;another 4 cases were without evidence of disease 9 to 19 months after surgery.Condusions The confirmation of ETF diagnosis is difficult before surgery.Surgical management is mostly recommended in ETT. The role of chemotherapy in ETT is not clear yet.

Objective To explore the technique and clinical effect of Fogarty catheter in treatment of acute limb arterial embol-ism.Methods Eight cases of acute limb arterial embolism treated by Fogarty catheter were analyzed retrospectively.The technique of thrombectomy,curative effect,complications,prognosis,and 6-24 months follow-up results were assessed to evaluate the safe-ty,effectiveness and operative skills.Results Seven cases were cured,and 1 case was efficacious.The endangium injury and vaso-spasm was occurred in 1 case,respectively.During follow-up from 6 to 24 months,6 cases recovered activity,1 case was hemiplegia because of cerebral infarction after 12 months,and 1 case died of respiratory function failure after 6 months.Conclusion Fogarty catheter is safe and effective in treatment of acute limb arterial embolism.

SELEX is a newly developed biochemical technique,which filter out high specificity and high affinity ligand for the target molecules through the identification of aptamer combined with the target molecules.The specific aptamer was used in a variety of clinical applications,such as diagnosis of the disease,development of new therapeutic drugs and even directly applied to disease treatment.

Objective To investigate the correlation between serum soluble epithelial cadherin (sE-cad) and postoperative recurrence and prognosis in patients with advanced gastric cancer.Methods The level of serum sE-cad in 85 patients with advanced gastric cancer (advanced gastric cancer group) was detected by ELISA technique preoperative and postoperative 1 month,and compared with 30 healthy controls(control group).The patients in advanced gastric cancer group were followed up for 3 years,the level of serum sE-cad in recurrent patients and non-recurrent patients was compared.Results The level of serum sE-cad in advanced gastric cancer group preoperative was significantly higher than that in control group [(24.3 ± 14.8) μ g/L vs.(9.4 ± 3.8) μ g/L,P ＜ 0.01].The level of serum sE-cad in advanced gastric cancer group was significantly decreased postoperative 1 month [(12.5 ± 6.4) μ g/L vs.(24.3 ± 14.8) μ g/L,P ＜0.01].The level of serum sE-cad in recurrent patients was significantly higher than that in non-recurrent patients and postoperative 1 month [(20.7 ±9.8)μg/L vs.(12.5 ±6.4),(14.8 ±6.2) μg/L,P＜0.01].Univariate analysis revealed that preoperative high serum sE-cad level was related with tumor size,differentiated degree,lymph node metastasis ratio,depth of tumor invasion (P ＜0.05),but had no relationship with histological type(P＞ 0.05).Elevated preoperative serum sE-cad level negatively affected the postoperative survival rate and recurrence rate.Multivariate Logistic regression anaiysis revealed that preoperative serum sE-cad level was an independent risk factor for postoperative 3 years survival rate in advanced gastric cancer (HR =2.068,P =0.013).Conclusions Preoperative elevated serum sE-cad level is related with pathologic features in patients with advanced gastric cancer,and may be an important prognostic factor.Postoperative monitoring the level of serum sE-cad is useful for evaluating the prognosis and recurrence.