To ensure the quality of direct digital radiography images, the management and control of image quality, basic adjustment of facilities post-processing, and raising technicians' professional quality mut be performed. To protect patients from radiation should be emphasized in medical staffs. Radiation should be reduced when ensuring the images' quality, and green examination concepts should be advised.

The objective of this paper is to find out a way that calculate the consumed peak value of oxygen in medical central oxygen supply system,which is the basis for discussion of purchasing hospital oxygen generating system.The author established a math model by poisson distribution to describe the consumed peak value of oxygen in medical central oxygen supply system to find out a convenience way to calculate the consumed peak value of oxygen.

Objective To determine the indexes for evaluating medical central compressing air sypply system.Methods According to the gas equation,pressure calculation was perfomed with the pressure variation as the monitoring subject.Results Such parameters could be used for monitoring medical central compressing air supply system as as average velocity & instanteous velocity of gas consumption,air compressor's average exhaust velocity & exhaust velocity at start-stop point,and pressure-exhaust velocity curve of air compressor.Conclusion The method can be applied to enhancement of quality management & maintenance of the equipment.

Objective To solve the encountered problem of lack of space and dyskinesia of detector in dual energy X-ray absorptiometry system, Methods The method used PartitionMagic8.0 software to partition space in hard disk and added the load to keep the detector balance for moving, Results The original software can run in hard disk, and the pulleys are not gotten force from side. Conclusion The reason of problem is analyzed to find the method that can reduce the percentage for system failure and improve precision and accuracy of data.

Objective To study the nerve protective mechanism of puerarin on ischemic brain injured and observe the expression change of TNF-α cytokines in ischemic brain area. Methods 90 healthy male SD(Spraque-Dawley)rats were used to built the animal model of brain medium sized artery focal cerebral ischemia reperfusion with the patching methods, and the rats were randomly divided into three groups: Sham operation group(n=30),operation group(n=30),operation with puerarin interfered group(n=30).There were five different observing time in every group(6h,12h,24h,48h,72h after operation).The operation with puerarin group rats were treated with puerarin solution, the sham operation and operation group rats were injected the same volume Sodium Chloride. To observe the expression of TNF-α cytokines in different time, immunohistochemistry staining in ischemic region was used. Results Compared with the sham operation group. the expression of TNF-α cytokine in cerebral isehemic reperfusion brain tissue in the operation and the operation with puerarin interfered groups was higher(P＜0.01).Compared with the operation group, the expression of TNF-αcytokine was significantly decreased in different time after cerebral ischemic-reperfusion in the operation with puerarin interfered group(P＜0.01 or P＜0.05).Conclusions The puerarin can restrain the expression of the TNF-α cytokine.

Objective To evaluate the feasibility and effectiveness of full-size three-dimensional individual printed model (3D-IPM) for improving the patient's understanding of laparoscopic partial nephrectomy (LPN) preoperatively.Methods Between June 2015 and June 2016,37 patients with cT1 renal tumors underwent retroperitoneal LPN.The 3D individual digital models (3D-IDMs) were created using 3D medical image reconstructing and guiding system (3D-MIRGS) and the full-size 3D-IPMs were fabricated correspondingly.For each patient and his/her closest accompanying immediate family member (CAIFM),two preoperative conversations with a single surgeon were held by using patient's CT films,the entity of 3D-IPM combined with 3D-IDM demonstration separately.The preoperative levels of comprehension to the renal anatomy,mass characteristics,the upcoming PN procedure,potential complication risks and postoperative prognosis were evaluated using a self-made scoring questionnaire in the patient and CAIFM groups.Results All the fabrications of full-size 3D-IPMs were technically successful.Both in patient and CAIFM groups,the total preoperative comprehending score (total-PCS) elevated significantly by presenting 3D-IPM combined with 3D-IDM demonstration than CT films (42.7 vs.31.5 in patient group,P ＜ 0.05;44.6 vs.33.1 in CAIFM group,P ＜ 0.05).Sub-PCSs in all 5 aspects also showed a uniformed climbing pattern with the assistance of 3D-IPM combined with 3D-IDM demonstration rather than CT films.Conclusion The application of 3D-IPM combined with 3D-IDM demonstration can improve the preoperative comprehension of the patient and CAIFM to LPN with more intuitionistic and verisimilar presentation.

Objective To analyze the effect of different areas of paries medialis defect of femoral trochanter on the stability of fracture ends after percutaneous compression plating for femoral intertrochanteric fracture.Methods Thirteen preserved cadaveric specimens of adult femur were used in this experiment.The age of death ranged from 30 to 50 years.Oblique osteotomy was conducted under the same condition using a wire saw to create experimental models of fracture of Evans-Jensen type Ⅳ.The ratios of the area of paries medialis defect to the projected area of lesser trochanter in the specimens 1 to 13 were set respectively as 0,10.0％,14.5％,20.2％,23.4％,30.6％,45.8％,56.8％,76.8％,88.7％,99.8％,121.3％ and 149.4％.All the fractures were fixated by standard percutaneous compression plating.Cyclic load was applied on each specimen using Instron 2000 universal material tester.A vertical load of 600 N was applied for respectively 1,10,100 and 1,000 times to measure the displacements of proximal and distal fracture ends.Results When the ratio of the area of paries medialis defect to the projected area of lesser trochanter was 30.6％,the average displacements of the proximal and distal ends were 0.14 cm and 0.10 cm.When the ratio was 45.8％,the average displacement of the proximal end was 0.53 cm,278.6％ greater than that for 30.6％;the average displacement of the distal end was 0.41 cm,310.0％ greater than that for 30.6％.When the ratio was 149.4％,the average displacement of the proximal end was 0.93 cm,564.3％ greater than that for 30.6％;the average displacement of the distal end was 0.65 cm,550.0％ greater than that for 30.6％.Conclusions When the ratio of the area of paries medialis defect to the projected area of lesser trochanter reaches ＞ 45.8％,the area of paries medialis defect will have a significant effect on the stability of fracture ends after percutaneous compression plating for femoral intertrochanteric fracture.The displacement will increase linearly under the same compression with the increase in defect area.

Objective To observe the clinical efficacy of Sha-petechia releasing therapy based on She medicine in treating occipital neuralgia, for proving its effectiveness and advantage. Method Eighty patients were randomized into a treatment group and a control group, 40 cases in each group. The treatment group was intervened by Sha-petechia releasing therapy based on She medicine, while the control group was by Western medications, 10 d as a treatment course, totally for 2 courses. The clinical efficacy and change of Visual Analogue Scale (VAS) score after intervention were observed. Result The total effective rate was 92.5% in the treatment group versus 82.5% in the control group, and the difference was statistically significant (P<0.05). Conclusion Sha-petechia releasing therapy based on She medicine is an effective approach in treating occipital neuralgia.

Objective To explore the relationship between genetic polymorphisms of ADIPOR2 with serum APN level ,inti‐ma‐media thickness(IMT)and atherothrombosis cerebral infarction risk .Methods The case control study was adopted ,300 patients with atherothrombosis cerebral infarction in our hospital from September 2009 to September 2014 were selected as the observation group ,meanwhile contemporaneous 300 individuals undergoing the physical examination were selected as the control group .The clinical data in all the subjects were collected and performed the carotid arterial examination ,the serum APN level was detected ,the rs12342 polymorphism of ADIPOR2 gene was detected .The genetic polymorphisms of ADIPOR2 were compared between the two groups and its relationship with serum APN and IMT was analyzed .Results The probability for suffering from atherothrombosis cerebral infarction in the AA genotype was increased compared with the GG genotype ,the difference was statistically significant (OR=1 .903 ,95% CI:1 .092-2 .703 ,P=0 .011) .Compared with the control group ,the IM T values in various subgenotype groups of the observation group were elevated ,while the APN levels were decreased ,the differences were statistically significant ( P<0 .01) .Compared with the genotype GG ,the IM T values in the genotype AA and AG were increased and APN levels were de‐creased ,the differences were statistically significant (P<0 .01) .Conclusion Genetic polymorphisms of ADIPOR2 maybe a genetic locus for the pathogenesis of Chinese Han people of atherothrombosis cerebral infarction .

Objective To investigate the imaging features of Budd-Chiari syndrome(BCS) on 64 slice spiral computed tomography(64SCT) and the diagnostic value of 64SCT for BCS.Methods Twenty-nine patients diagnosed as BCS by 64SCT were retrospectively included into this study and all the patients were researched by digital substraction angiography(DSA).Two abdominal radiologists analyzed the CT imaging features of BCS,paying attention to the vascular lesion,the morphology abnormality of the liver and the degree of portal hypertension,with review of DSA findings.Results ①The accuracy of 64SCT for BCS was 93.1%(27/29),and there were 2 false positive cases and no false negative case.The accuracy of 64SCT for those patients with thrombosis of inferior vena cava(IVC) and(or) hepatic vein(HV) was high as compared to those with stenosis of IVC and(or) HV.②The morphology abnormality of the liver included hepatomegaly(24 cases),low attenuation(27 cases) and inhomogeneous pattern of parenchymal contrast enhancement(5 patients in arterial phase and 19 patients in portal vein phase).③The images of all the patients showed the features of portal hypertension.Conclusion The accuracy of 64SCT for BCS is satisfactory and the false negative is seldom.The 64SCT could accurately display the morphology abnormality of the liver and the compensatory circulation in BCS patients.For those patients with stenosis of IVC and(or) HV,however,the diagnostic power of 64SCT is limited.