As the great progress in computer technology, the image reconstruction of PET has been extensively studied, especially the fast methods being able to suppress the noise and meanwhile improve spatial resolution. This paper gives a brief description of the principle and research status of PET reconstructions, and that of 3D PET as well.

This paper introduces the generating principle of energy correction table for digital gamma camera and elaborates a method for real-time energy correction. According to the position information of the collected events, correction cells are determined. With the correction value in four adjacent correction cells, coefficient of energy correction is worked out through bilinear interpolation. Finally, real-time energy correction for the collected events is achieved through software programming.

Secreted protein acidic and rich in cysteine (SPARC) is expressed in esophageal cancer abnormally.On the one hand,recent studies show that high SPARC expression is correlated with progression and metastasis of esophageal cancer.On the other hand,high SPARC expression increases chemosensitivity and improves short-term efficacy in patients.

Betatrophin,discovered in 2013,is a protein secreted by liver,white adipose tissues,and brown adipose tissues.Betatrophin can improve glucose tolerance in mice by promoting islet β cell proliferation and increasing the number of β cells significantly and specifically.At the same time,Betatrophin is involved in lipid metabolism.Betatrophin may work as the new target for treatment of diabetes and disorders of lipid metabolism.

Early lymph node metastasis is a common clinical phenomenon in many human cancers, which is associated with both aggressive disease and poor prognosis. Clearly, treatments to specifically block dissemination through the lymphatic network would be desirable either as independent therapies or as adjuncts to existing chemotherapy. At the present stage the target vessels for invasion by lymph-metastasizing tumor cells include preexisting tissue lymphatics abutting the tumor mass through either coincidence or mutual chemoattraction, as well as new lymphatic vessels that proliferate either within or around the tumor as a result of lymphangiogenesis. The lymphangiogenesis is regulated primarily by the lymphangiogenic growth factors VEGF-C and VEGF-D generated by tumor cells or host cells including tissue macrophages. Nevertheless, it remains controversial as to whether this metastasis-enhancing effect simply results from an increase of the number of target vessels due to mitogenesis or from other properties of the newly dividing tumor lymphatics.

Objective To investigate the surgical indicatin and outcome of recurrent gastric carcinoma.Methods Review the clinical data of 56 cases with recurrent gastric carcinoma underwent reoperation from 1990 to 2000.The operative indication, surgical method and complications were analized.Results In 25 cases the recurrent tumor were resected (44.6%),in 10 cases adjacent organs were resected.NO operative motality was observed.Conclusions More aggressive radical resection of the gastric cancer is the key to prevent recurrence.Laparotomy should be performed without delay once there is a suspicion of recurrence.

Objective To analyse the characteristics of maxillofacial injuries resulted in different causes. Methods A retrospective review was done of patients admitted to the Stomatology Hospital of Fourth Military Medical University from January, 1996 to July, 2003. Data was grouped by different causes. Results 1 188 patients were reviewed, the majority of victims caused by different causes were males, the ratio of male and female is 3.34∶1. Most industrial and sport injury occurred in men. Traffic accidents were the major cause of the midface fracture and mandibular fracture. While violence was the major cause of pure soft injure and alveolar bone fracture. Conclusions Traffic accidents and violence were the major causes of facial injury. The facial injury caused by traffic accidents, industrial accidents and fall was more serious than those caused by other causes. More emphasis should be put on the prevention and treatment of these injuries to minimize the maxillofacial malformation.

Cervical necrotizing fasciitis (CNF) is an aggressive infection associated with high mortality. Various complications have been described in previous literature. However, internal jugular vein thrombosis is rare in such lesions. We presented a case of internal jugular vein thrombosis caused by CNF and analyzed related literature.
Fasciitis, Necrotizing ; complications ; Humans ; Jugular Veins ; Neck ; Venous Thrombosis ; etiology

The clinical data of 186 patients with acute gout attack during upper gastrointestinal bleeding were analyzed retrospectively.The ratio of male to female was 1.7∶1, smokers and alcohol drinkers accounted for 66.1% ( 123/186 ) and 62.4% ( 116/186 ) of patients were had underlying diseases.All patients had different degree of joint painful and fever , the blood uric acid levels were higher.Gastroscopic examinations were performed in 166 patients , of whom 88 cases received endoscopic intervention.The symptoms of gout were improved after treatment with dexamethasone and celecoxib ; and the medication did not induce or increase gastrointestinal bleeding.

Objective To investigate the survival benefit of patients with esophageal squamous cell carcinomas who recieved postoperative chemotherapy of tegafur combined with FT-207 radiotherapy.Methods Data from 126 patients with esophageal squamous were analyzed who undergone radical resection from January 2008 to December 2010,consisting of 92 patients underwent surgery alone and 34 patients took oxaliplatin combined with tegafur postoperatively (oxaliplatin 130 g/m2,d1,tegafur 500 mg/m2,d1-5,21 d for a cycle,every patient received at least two cycles).Results The 1-year survival rate and 3-year survival rate was 93.5 ％ and 75.0 ％ in the surgery alone group,was 97.1％ and 76.2 ％ in the surgery plus postoperative chemotherapy (P =0.590).There was no significant differences in survival in the two groups,even with Coxregression multivariate analysis and with stratifications of gender,age,tumor location,degree of cell differentiation,invasion depth,lymphatic metastasis and TNM stage.Conclusion Postoperative adjuvant chemotherapy with oxaliplatin combined with tegafur has not significantly improve the survival rate of patients with esophageal squamous cell carcinomas undergoing radical resection.It is still lack of an effective project for postoperative adjuvant chemotherapy for esophageal cancer,and it is necessary for further study.