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.

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.

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.

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.

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.

Objective To determine the relationship between normal weight obesity (NOW) and cardiovascular risk factors.MethodsA total of 940 adults who received a health examination in out hospital were recruited in a cross-sectional study,and 407 with a body mass index (BMI) of18.5 to 25 kg/m2were enrolled for further analysis.Body fat percentage ( BF％ ) was measured by bioelectrical impedance analysis (BIA),and the subjects were assigned to the NOW group ( BF％ ≥25％ for male or BF％ ≥35％for female) or the control group ( BF％ ＜ 25％ for male or BF％ ＜ 35％ for female).Cardiovascular risk factors and their detection rates were compared between the two groups by using independent sample t test and x2 test.The correlationbetweenNOW and cardiovascular risk factors was assessedbylogistic regression.Results The prevalence of NOW in men and women were13.1％ and14.9％,respectively.The prevalence of NOW was increased with age ( x2 =6.90,P ＜0.05 ).Systolic blood pressure (SBP),diastolic blood pressure ( DBP ),total cholesterol ( TC ),triglycerides ( TG ),low-density lipoprotein cholesterol ( LDL-C) and serum uric acid (SUA) were significantly increased in the NOW group (t values were 2.97,2.44,2.54,5.09,2.71and 3.91,respectively; all P ＜ 0.05 ) ; whereas high-density lipoprotein cholesterol ( HDL-C) was significantly decreased in the NOW group (t =-3.90,P ＜ 0.05 ).The prevalence of hypertension,hyperglycemia,high triglyceride,low HDL-C,dyslipidmia and hyperuricemia was increased in the NOW group in comparison with the control group ( x2 values were 6.76,5.58,14.50,11.97,10.97 and 8.76,respectively;allP＜ 0.05 ).LogisticregressionshowedNOWincreasedtheriskof hypertension,hyperglycemia,dyslipidmia or hyperuricemia by 2.186,2.120,2.088 or 4.175 times.After adjustment for age and gender,the risk for hyperuricemia was decreased to 3.491,but remained statistically significant higher.Conclusions NOW may be correlated with cardiovascular risk factors,and those with NOW could be at higher risk for cardiovascular diseases.

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

Objective To investigate the clinical values and characteristics of whole body bone ima-ging (SPECT/CT)in detecting bone metastases in the preoperative patients with lung adenocarcinoma or squa-mous cell carcinoma for staging and determining the best treatment plan.Methods Eighty-two preoperative patients with primary pulmonary adenocarcinoma or squamous cell carcinoma performed 99 Tcm-MDP SPECT/CT whole-body bone imaging.One week before surgery,parts of positive lesions performed MRI scan.The differ-ence of the incidence of bone metastasis was analysed by χ2 test.Results In all 82 patients with lung cancer, there were 38 adenocarcinomas and 44 squamous cell carcinomas.Bone metastases were detected in 38 cases, the incidence rate was 46.3%.Of which,among lung adenocarcinoma,the incidence rate was 57.9% (22 /38),and the incidence rate was 36.4% (1 6 /44)in lung squamous cell carcinoma,and the difference was sta-tistically significant (χ2 =1 2.66,P =0.027).The most common area was bilateral ribs,followed by vertebra, pelvis,bones of the extremities and skull.Conclusion Lung adenocarcinoma compared with squamous cell carcinoma is prone to bone metastases,and bone metastases are more common in bilateral ribs.It has important value that whole body bone imaging in screening for bone metastases of pre-operative patients with lung cancer for staging and making the treatment plan.