Primary mediastinal large B-cell lymphoma (PMBCL) has specific phenotypical features, pathological features and clinical presentation.PMBCL patients are predominantly female and typically present early stage disease and mediastinal involvement.Due to the lack of randomized studies, most patients with PMBCL usually receive combination chemotherapy with consolidation IF-RT.Considering IF-RT can improve the complete remission rates and recurrence-free survival, the combined therapy achieved good results.The different chemotherapeutic regimens were used in clinical practice of different institutions and clinicians, including CHOP or CHOP-like, intensive chemotherapy or the third-generation regimens.Recent studies have showed promising outcomes when rituximab is added to doxorubicin-containing chemotherapy.Patients treated with R-CHOP with radiotherapy had significantly better local control rates compared with R-CHOP without radiotherapy, especially for bulky diseases.Intensity-modulated radiation therapy offers excellent target coverage, favorable outcome and minimal toxicity in PMBCL.Although the majority of patients with PMBCL receive radiotherapy following chemotherapy, few studies have specifically addressed the role of consolidation radiotherapy for the treatment of PMBCL.The prognostic importance of rituximab and radiotherapy has not been clearly defined in patients with PMBCL.Heterogeneous treatment options and small number of patients have made it difficult to draw definitive conclusions about the potential advantages of rituximab and radiotherapy in patients with PMBCL.

There has been great interest in NiTi alloy in medical domain si nc e Buehler found its memory effect in 1963. In the recent 30 years, a lot of basi c and clinical researches of the alloy have been reported in the world. From the biomechanical viewpoint, the ossification and resorption of bone are related to the stress. Different stresses are required in the different kinds of fracture healing. Many measurements have been used to test the biomechanical properties o f the Nitinol orthopedic instruments. The clinical applications of the instrumen ts in hand surgery started in China in 1980's and resulted in satisfactory outco mes. This article summarizes the progress made in the basic researches of the ni tinol orthopedic instruments and their clinical applications in hand surgery.

In this paper, industry development and market tendency, supervision and standardization of nanomaterial-contained medical devices are overviewed comprehensively based on a large number of reference data including national and international information. Furthermore, the consideration about standardization of biological evaluation for nanomaterial-contained medical devices is discussed by combined some works performed in our laboratory.
Device Approval ; Equipment and Supplies ; standards ; Nanostructures ; standards

Objective The goal of this work is to evaluate the dosimetric characteristics of a new 2D diode array (Mapcheck from Sun Nuclear Corporation,Melbourne,Florida) and assess the role it can play in routine IMRT QA. Methods Fundamental properties of the Mapcheck such as reproducibility and linearity were studied for high-energy photon beams. Clinical performance of the MapCheck for relative and absolute dosimetry was demonstrated with head and neck IMRT plans,and compared with plan dose distribution. Absolute dose measured by Ion chamber and Mapcheck are compared with the one given in TPS. Results The Mapcheck offers the dosimetric characteristics required for performing both relative and absolute dose measurements. Conclusion Mapcheck can provide the verification of absolute dose and relative dose. Its use in the clinic can simplify and reduce the IMRT QA workload.

Objective To explore influencing factors of the individual entrepreneurship from as-pects of entrepreneurial intention, entrepreneurial cognition and entrepreneurship education. Methods Questionnaire of entrepreneurial cognition was conducted for 1860 students in Southern Medical Universi-ty. SPSS was used to analyze the data. Results ①Entrepreneurship intention among university students were strong.②There was a lack of awareness of college students entrepreneurship policy among college students. ③Students never receiving entrepreneurship education accounted for 65%, but 89%students held that entrepreneurial education courses was necessary. Conclusions Due to arduous professional tasks, medical students have compelling and demanding need for personalized entrepreneurship educa-tion. Initiative participation of library in integrating of entrepreneurship education information by using advantageous resources plays a important role in entrepreneurship education.

Objective To investigate reasonable method of deciding internal target volume (ITV) by comparing physical phantom volumes (including moving volume) with reconstruction volumes of spiral CT scanning.Methods The various-volume wax blocks which were labeled No.1-9 were made and put on the respiratory motion simulator.The range of motion was set 2.5 cm and frequency 18 beats/min.All blocks were scanned 10 times continuously and imported into the Eclipse TPS.All blocks volumes were calculated and then compared with the true physical volumes and paired t-test.Results The reconstruction volumes of 1-9 blocks were bigger than their stationary volumes (121.77 cm3 vs.103.14 cm3,P =0.038),but significantly smaller than their moving volumes (121.77 cm3 vs.161.75 cm3,P =0.045).The results can be gotten in different volume block scanning.The relative deviation of reconstruction volumes and the moving volumes tends to increase as the stationary physical volume decreases.Conclusions As to moving targets,conventional spiral CT scanning speed is too fast to collect all volume information of targets.So the one-time-scanning volume does not represent the ITV.

purpose: To calibrate the accurate value of 192Ir radioactivity again. materials and methods: To measure the dose rate of radioactivity in water and at air by ion chamber. results: To scale the activity of 192Ir radioactivity by air Kerma is agreement to the scaling method according to the JJG 773-92. conclusion: The investigation demonstrates that the accurate value of 192Ir radioactivity can be calibrated by the method of air Kerma.

[Objective]To discuss the surgical technique and clinical effects of open reduction and internal fixation with T style plate in the treatment of Die-punch fracture of distal radius.[Method]From August 2003 to October 2007,twenty-nine patients diagnosed as Die-punch fracture according to X-ray and computerized tomography were treated with open reduction through volar approach and internal fixation with T style plate and bone-grafts to support the articular surface of impacted fractures.There were 20 males and 9 females,with an average of 40.5 years(range 19-62 years).The fractures were caused by falling(n=23),traffic(n=4) and by athletics(n=2).There were 6 cases of open fracture.Eighteen cases were in the right wrist,and 11 in the left wrist.The displacement of articulatzons was from 1.5 to 3.5 mm.[Result]Twenty-six patients were followedup for 9 to 45 months,with an average of 28 months.Posteroanterior and lateral radiographs were taken periodically and fracture healing occurred all within 12 weeks.According to ADL standard and radiographs,21 cases were excellent(ADL scores:38-40),3 cases were good(scores:35-37).The excellent to good rate was 92.3%.No infection occurred.[Conclusion]Open reduction and internal fixation can help restore the smoothness of the articular surface and reduce the incidence of traumatic osteoarthritis.It is effective against the Die-punch fractures of distal radius.

Objective To study variations of plasma sE-selectin and sICAM-1 level of type 2 diabetes(T2DM) patients complicated with lower limb vascular disease,and contribution of these molecules to the formation of the lower limb vascular disease. Methods Plasma sE-selectin and sICAM-1 of 51 type 2 diabetic patients and 20 age & sex matched non-diabetes people(control group) were determined with ELISA.16 T2DM patients without lower limb vascular disease and 17 age & sex matched T2DM complicated with lower limb vascular disease were selected from the patients group,as group 1 and group 2 respectively,and 17 age and sex matched non-diabetic individuals were selected from control group as group 3.sE-selectin and sICAM-1 level were contrasted among the three groups. Results Levels of FPG,2 h PG,HOMA-IR,sE-selectin and sICAM-1 of diabetic group were significantly elevated than those of the control group(P0.05).FPG and 2 h PG in group 1 and group 2 were markedly higher than that in group 3(P

The inhibitory effects of total glucosides of Moutan Cortex (TGM) and to talglucosides of Paeony Lactiflora (TGP) on osmotic hemolysis and oxidative hemolysis induced by hydrogen peroxide were studied. TGM at lower concentration and TGP could inhibit osmotic hemolysis significcantly, but higher concentration (100mg ? L-1) of TGM had a hemolytic activity. TGM and TGP could inhibit hemolysis induced by H2O2 significantly,but TGM was more effective than TGP. TGM .TGP and Vit E all could inhibit lipid peroxidation and glutathione depletion, induced by H2O2, on erythrocytes.