巧用Photoshop制作医学幻灯片

Powerpoint为教学课件的制作提供了一个很好的平台,但在图像处理方面功能欠缺,将Photoshop和Powerpoint结合起来,可以做到优势互补。文章结合实例,介绍了巧用Photoshop的图层、帧模式动画、滤镜等功能,配合Powerpoint动作设计等,可制作出符合教学需要的背景、图片、动画,以达到教学的最佳效果。     

论细菌病毒湿热交换呼吸通路过滤器HMEF的选择使用

在手术室环境中，充满潜在的病原体和感染源。已有研究显示。与普通人群相比，医护人员．尤其是呼吸系统的医疗人员。有较高的气道反应性疾病或肺结核。本文拟寻找危险因子的源头，并探讨降低其对患者和医护人员危险性的方法。 使用细菌病毒湿热交换呼吸通路过滤器能降低患者感染的危险性．从而也可能降低医护人员的危险性。     

滤筒式可移动除尘器净化效率测定探讨

[目的]对移动武除尘器的净化效率进行测定,为建设项目职业病危害控制效果评价中对卫生工程防护措施的效果量化评价提供技术支撑.[方法]测量除尘器进风口的静压和动压,测量现场的温度和气压,测量除尘器进出口面积,用自动烟尘烟气测试仪采集烟尘样品,测定除尘器进出口烟尘浓度,计算出移动武除尘器的净化效率.[结果]测定的两种移动武除尘器净化效率分别为92.3％和93.4％.[结论]评定除尘净化效率时,由于含尘气量、粉尘成分、粉尘浓度等的变化,实测值与除尘器标称的除尘净化效率之间可能产生较大偏差.用分级除尘净化效率表示,可以减少此偏差.     

Use of a retrievable inferior vena cava filter in term pregnancy: Case report and review of literature

Venous thromboembolism is a significant cause of morbidity and mortality in obstetrics. Management with anticoagulation can be problematic, especially peripartum. We report the successful placement and retrieval of an inferior vena cava filter as prophylaxis for peripartum pulmonary embolism in a woman with a large, proximal, deep venous thrombosis at term.     

Case Report of Placement of a Bird's Nest Filter During Pregnancy

Anticoagulant therapy is the standard treatment of thrombotic disease to prevent embolic complications. In some circumstances, anticoagulation is not feasible, such as in the presence of heparin-induced thrombocytopenia or at the time of delivery. The case of a patient who developed deep vein thrombosis and heparin-induced thrombocytopenia is presented. A bird's nest inferior vena caval filter was successfully placed prior to delivery in order to prevent peripartum thromboembolic complications.     

Kalman filter techniques for accelerated Cartesian dynamic cardiac imaging

In dynamic MRI, spatial and temporal parallel imaging can be exploited to reduce scan time. Real‐time reconstruction enables immediate visualization during the scan. Commonly used view‐sharing techniques suffer from limited temporal resolution, and many of the more advanced reconstruction methods are either retrospective, time‐consuming, or both. A Kalman filter model capable of real‐time reconstruction can be used to increase the spatial and temporal resolution in dynamic MRI reconstruction. The original study describing the use of the Kalman filter in dynamic MRI was limited to non‐Cartesian trajectories because of a limitation intrinsic to the dynamic model used in that study. Here the limitation is overcome, and the model is applied to the more commonly used Cartesian trajectory with fast reconstruction. Furthermore, a combination of the Kalman filter model with Cartesian parallel imaging is presented to further increase the spatial and temporal resolution and signal‐to‐noise ratio. Simulations and experiments were conducted to demonstrate that the Kalman filter model can increase the temporal resolution of the image series compared with view‐sharing techniques and decrease the spatial aliasing compared with TGRAPPA. The method requires relatively little computation, and thus is suitable for real‐time reconstruction. Magn Reson Med, 2013. © 2012 Wiley Periodicals, Inc.     

The effect of notch filtering on the waveform of the newborn auditory brainstem response

Abstract

Objective: To identify whether the use of a notch filter significantly affects the morphology or characteristics of the newborn auditory brainstem response (ABR) waveform and so inform future guidance for clinical practice. Design: Waveforms with and without the application of a notch filter were recorded from babies undergoing routine ABR tests at 4000, 1000 and 500 Hz. Any change in response morphology was judged subjectively. Response latency, amplitude, and measurements of response quality and residual noise were noted. An ABR simulator was also used to assess the effect of notch filtering in conditions of low and high mains interference. Results: The use of a notch filter changed waveform morphology for 500 Hz stimuli only in 15% of tests in newborns. Residual noise was lower when 4000 Hz stimuli were used. Response latency, amplitude, and quality were unaffected regardless of stimulus frequency. Tests with the ABR stimulator suggest that these findings can be extended to conditions of high level mains interference. Conclusions: A notch filter should be avoided when testing at 500 Hz, but at higher frequencies appears to carry no penalty.