Objective To investigate the effect factors and the relationship of diagnostic system efficiency as soft copy reading with medical LCD.MethodsThirty chest images were selected from PACS on-line.Three of high,mid and low-experienced radiologists interpreted the images on different types of displays independently.Design four display levels based on five factors influencing diagnostic system efficiency,including view distance (0.3 m,0.6 m,0.9 m,1.2 m),monitor resolution ( 1 MP,2 MP,3 MP,5 MP),illuminant level (50 Ix,100 Ix,200 lx,400 lx),view angle (0°,15°,30°,45°) and angle of negative effect light (0°,30°,60°,90°).Three indices of misdiagnosis frequency,diagnosis time and frequency of unable to recognize were analyzed.Orthogonal experimental design and software SPSS 13.0 were used to analyze the results.Results The indices were much different for different factors at different levels.According to the index of average misdiagnosis frequency,extreme difference value of view angle was the lowest (1.4) and angle of negative effect light was the highest (5.0).Extreme difference value of view distance,monitor resolution and illuminant level were 2.9,2.8 and 2.5,respectively.ConclusionsThe order of different factors influencing diagnostic system efficiency is as follows: angle of negative effect light,view distance,monitor resolution,illuminant level and view angle.

Theecosystemfor a discipline is a complicated system consists of all the relative groups and the external environment of knowledge innovation,which the descipline is dependent upon It is a dynamic integrated system that the cluster of internal and external factors co-constitute,co-evolve and co-develope.The article studied the conditions and mechanisms for knowledge innovation of the ecosystem.

Background and Purpose:In recent years,along with marked rise in the incidence of lung cancer,the incidence of brain metastasis from lung cancer has increased year by year.The main treatment strategy of lung cancer with brain metastasis is irradiation,while so far there are only few researches concerning chemotherapy combined with radiotherapy for these patients.The aim of this study is to evaluate the therapeutic effect,survival rate and toxicity of chemotherapy with VM_(26)+DDP regimen given concurrently with whole-brain radiotherapy in lung cancer with brain metastasis.Methods:From Sep.2000 to Oct.2001,forty-one patients with lung cancer with brain metastasis were divided randomly into two groups: 20 patients(14 male,6 female) received concurrent chemoradiotherapy(chemoradiotherapy group),the other 21 patients(14 male,7 female) received only radiotherapy(radiotherapy group).In the chemoradiotherapy group,the average age was 50 years with range 40 to 70 years,16 patients were non-small-cell lung cancer,4 patients were small-cell lung cancer.In the radiotherapy group,the average age was 52 years with range 40 to 73 years and 19 patients were non-small-cell lung cancer,2 patients were small-cell lung cancer.For both groups,the same radiation technique was given with conventional fraction.Radiotherapy was delivered by 6MV.Fractionations of 3Gy/fraction/day was delivered 10Gy/5 factions/week.The total dose was 30Gy/10Fr/2W.For chemoradiotherapy group,the patients were also given concurrent chemotherapy(VM_(26) 60mg/m~(2)/ day iv on days 1-3,cisplatin 60 mg/m~(2) iv on the 1~(st)day).Results:The response rate and complete response in the chemoradiotherapy group was significantly higher than that in the radiotherapy group(75% ?? 38.10%,P

Object To determine and compare the content of polysaccharides in three species of Semen Plantaginis from different places of origin. Methods Spectrophotometry was used. Results The content of polysaccharides in the seed of Plantago major L. was higher than those in the seed of P. asiatica L. and P. depressa Willd. Conclusion The content of polysaccharides in Semen Plantaginis of different species or origins are obviously different.

0.05).Conclusions:Concurrent chemoradiotherapy can be well tolerated even though the acute side-effects less than grade 2 were higher in concurrent chemoradiotherapy than other group.Immediate response was very encouraging in the concurrent group.There was no advantage in terms of survival rate in the concurrent group compared to the sequential group.

Objective:To determine the antioxidization and antiproliferation of extract from leaves of Toona sinensis (LTS).Methods:The total phenolic extract of LTS was obtained by solvent and polyamide resin to determine the content.The antioxidization of the LTS extract was measured by TOSC assay.Antiproliferation was studied in vitro with different human cancer cells.Results:The total phenolic content in the LTS was (427.53±4.31) mg/g and antioxidization was 807.64 μmoL vitamin C equivalents/g in the sample.The extract significantly inhibited the colon cancer cell Caco-2,human liver cancer cell HepG2 and breast cancer cell MCF-7 proliferation with EC50 (4.00±0.39),(153.16±13.49) and (193.46±14.68) μg/mL,respectively.The bioactivity index (BI) of the LTS extract was nearly 283.Caco-2 was more sensitive than MCF-7 and HepG2.Conclusion:Extract from LTS has anticancer properties useful for preventing chronic diseases.

Objective To discuss and to compare the curative effects of interventional embolization with different embolic agents in treating giant hepatic cavernous hemangiomas. Methods From 2008 to 2010, a total of 30 cases with clinically proved hepatic cavernous hemangioma were treated with interventional embolization. According to the embolic agents used , the patients were divided into pingyangmycin-lipiodol emulsion mixed with sodium alginate microspheres group(PLE+KMG, group A, n=15) and pingyangmycin-lipiodol emulsion group (PLE, group B, n=15). CT scanning was performed one, 3, 6, 12 months after the treatment to evaluate the curative effect. Results The technical success rate was 100%in both groups. The mean PLE dose used in group A and B was (10.9 ± 5.2) ml and (11.4 ± 4.9) ml respectively, the difference between the two groups was not significant (P > 0.05). CT reexamination performed one, 3, 6 months after the treatment showed that a reduction in tumor volume over 50%in group A was seen in 9, 11 and 14 cases respectively, while in group B it was 0, 3 and 5 cases respectively (P <0.05). One week after the procedure, the degree of pain in patients of group A was more severe than that in patients of group B, the difference between the two groups was statistically significant (P < 0.05). Slight abnormal hepatic function was seen in some patients of both groups, which presented mainly as an elevation of aminotransferase, which returned to normal after symptomatic medication. Follow-up with questionnaire indicted that patients of group A were more satisfied with the treatment than the patients of group B. Conclusion Transhepatic infusion of pingyangmycin-lipiodol emulsion is a safe and effective treatment for giant cavernous hemangioma of the liver. Combination use of pingyangmycin-lipiodol emulsion and sodium alginate microspheres can obviously reduce the tumor size mainly in the first and the third month after the treatment, besides it produces instant clinical effect although the pain is more severe than in patients treated with pure pingyangmycin-lipiodol emulsion.

ween WHO histological subtype and Masaoka clinical stage, and their combination is valuable for guiding postoperative treatment in thymoma.

Objective To evaluate the therapeutic efficacy and treatment-related toxicity of stereotactic body radiation therapy(SBRT)in patients with medically inoperable stage Ⅰ/Ⅱ non-small cell lung cancer(NSCLC). Methods SBRT was applied to 30 patients, including clinically staged T1 ,T2(≤5cm)or T3(chest wall primary tumors only), N0, M0 ,biopsy-confirmed NSCLC. All patients were precluded from lobotomy because of physical condition or comorbidity. No patients developed tumors of any T-stage in the proximal zone. SBRT was performed with the total dose of 50 Gy to 70 Gy in 10 - 11 fractions during 12 - 15 days. prescription line was set onthe edge of the PTV. Results The follow-up rate was 100%. The number of patients who completed the 1-, and 2-year follow-up were 15, and 10, respectively. All 30 patients completed therapy as planned. The complete response(CR), partial response(PR)and stable disease(SD)rates were 37%, 53% and 3%, respectively. With a median follow-up of 16 months(range,4-36 months), Kaplan-Meier local control at 2 years was 94%. The 2-year overall survival was 84% and the 2-year cancer specific survival was 90%. Seven patients(23%)developed Grade 2 pneumonitis, no grade ＞ 2 acute or late lung toxicity was observed. No one developed chest wall pain. Conclusions It is feasible to deliver 50 Gy to 70 Gy of SBRT in 10 - 11 fractions for medically inoperable patients with stage Ⅰ / Ⅱ NSCLC. It was associated with low incidence of toxicities and provided sustained local tumor control.The preliminary investigation indicated the cancer specific survival probability of SBRT was high. It is necessary to perform similar investigation in a larger number of patients with long-term follow-up.