宣城市中心医院PACS/RIS系统的构建与解决方案

本文针对提高医院影像科室实际工作效率的目的,通过构建PACS/RIS系统框架、配置数据库系统服务器、配置数据存储、组建医院影像整体网络、实现DICOM标准、规范影像科室业务流程等一系列方法,结合三级数字化医院PACS/RIS系统具体标准规范试验,多方面对医院PACS/RIS系统的建设进行深入剖析,得出了医院PACS/RIS系统整体解决方案,全部投入实施以后可以提高医院影像科室50%的工作效率。     

基于PACS的心电信息系统

介绍了基于PACS的心电信息系统。该系统使得心电图影像数据在存储可靠性、安全性、通用性等方面得以提升。通过分析现代数字化医院度区域医疗卫生服务平台对心电影像的需求．阐述基于PACS的心电信息系统能为现代数字化医院提供更好的支持。基于PACS的心电信息系统,是一个在设计、开发、应用、维护等各方面性价比突出的方案,可为医疗机构、患者提供有力的支持与保障。     

互联网时代下“云胶片”的应用

为了解决患者来回奔波、排长队打印塑料胶片的现象,降低患者在新冠肺炎疫情期间来医院引发交叉感染的风险,帮助患者更加便捷的保存及分享自己的影像资料,减少塑料胶片的消耗,降低胶片对环境带来的化学污染。通过将影像资料存储在云端的方法,患者通过短信链接或者扫描二维码查阅自己的报告、电子胶片和原始影像。云胶片上线运行后,我院塑料胶片打印数量逐渐降低,越来越多的患者了解和接受这种更加便捷环保的影像资料服务模式。云胶片的推行有利于影像服务的提升,减少患者来回奔波次数和排队等候时间,不仅节约了胶片消耗的成本,也提供了患者便捷的保存和分享胶片的方法,尤其是在今年全球新冠肺炎疫情爆发之际,有效减少了患者在院聚集的时间。     

基于开放式操作系统的PACS服务器的设计

医学影像归档与通信系统（PACS）是医学影像信息学研究的一个重要领域。PACS服务器又是PACS系统的核心部分。面对中小规模医院实现医学信息无胶片化和网络化管理的要求，相应地需要对PACS服务器进行有性的设计。本文首先介绍了医学影像信息学的发展背景、PACS系统的组成和PACS服务器的结构。在此基础上讨论了在性能和价格两方面的权衡之下，如何为适用于中小医院的PACS服务器选择操作平台和数据库管理系统。     

一种基于混合架构的PACS系统解决方案设计

针对传统PACS系统仅局限在局域网,不利于对系统进行维护和扩展的问题,提出一种基于B/S和C/S混合架构的PACS系统解决方案。通过分析传统B/S和C/S架构存在的优缺点,并结合医院影像科与腹腔镜科工作流程,构建了PACS的混合架构系统。利用DICOM实现对图像的处理、传输、共享;利用IIS构建WEB应用服务器,从而搭建数据访问方式;利用.NET中的ADO.NET实现对数据库的访问。通过设计实现了系统在中小型医院的应用,实现了图像共享,提高了医院整体工作效率。     

医疗信息系统网间安全解决方案

随着近年来全国各大医院信息化工作的迅速发展,大多数医院基本完成了以医院信息系统（HIS）为中心,以检验科信息系统（LIS）、影像归档和通信系统（PACS）,以及电子病历系统等为支撑的核心业务系统建设,医院医疗工作全面进入信息化时代。     

基于医院信息平台全诊疗过程的电子病历应用

为了解决医院信息系统整合效果差、医疗资源利用率低下的问题,各大医院开始注重基于全诊疗过程的电子病历建立,由此促进医院信息化发展,为医生和患者提供高效的信息查询服务.在电子病历系统中,构建以六大基础服务和数据中心为基础的服务体系,并实现数字签名、区域协作、应用整合、患者索引、通讯服务等功能,达到统一高效,互联互通的建设目标.     

成就影像先驱的力量 2009富士数码相机秋季发布会侧记

我们一直在强调富士这个从胶片时代一路走来的影像巨头对于影像技术发展的巨大推动。虽然从市场占有率来看,富士胶片拼不过索尼、斗不过佳能,一直处于市场的第二梯队。而事实上,富士在影像方面的技术实力确是独树一帜,色彩、成像、宽容度,“如人眼所见”的高品质影像是不争的事实。7月22日,富士胶片公司在北京召开发布会,宣布搭载升级SuperCCDEXR的新旗舰产品-S205EXR与F75EXR的诞生,而万众瞩目的世界上首部3D影像系统也终于成为现实。     

区域PACS系统实现的关键技术

目的:通过现代信息技术,解决在区域PACS系统实现过程中遇到的典型问题,实现区域PACS系统得到广泛应用的目的。方法:提出EMPI(病人主索引)的概念,以XDS-I应用为技术框架,介绍区域PACS系统的架构组成,详细论述EMPI及XDS-I技术在区域PACS系统中的应用方法及优势。结果:应用了EMPI及XDS-I技术框架后,使得区域PACS系统解决了患者的身份识别问题以及不同医疗机构信息系统间影像资料的存储与共享问题。结论:EMPI及XDS-I技术在区域PACS系统中的应用,可以将患者资料快速准确完整地传输,实现了区域间的信息共享,提高区域内医疗机构日常诊断的效率,为科学分析和综合诊断提供了有利保障。     

我院PACS系统的应用和发展

本文介绍了我院PACS系统引入的必要性,以及PACS系统的维护。并对我院PACS系统在临床应用,远程医疗,图像检索等的进一步发展作了阐述,详细讨论了基于内容的图像检索在PACS系统中的应用。最后,总结和展望了PACS系统在医院的发展。     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

Critical Stage Rule-Based Real Time Dispatch（RTD）System in Highly-Mixed-Products （HMP） FAB

An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.     

GaAsSb/InAlAs PA DHBTs Grown by Production MBE

The epi material growth of GaAsSb based DHBTs with InAlAs emitters are investigated using a 4 × 100mm multi-wafer production Riber 49 MBE reactor fully equipped with real-time in-situ sensors including an absorption band edge spectroscope and an optical-based flux monitor. The state-of-the-art hole mobilities are obtained from 100nm thick carbon-doped GaAsSb. A Sb composition variation of less than ± 0.1 atomic percent across a 4 × 100mm platen configuration has been achieved. The large area InAlAs/GaAsSb/InP DHBT device demonstrates excellent DC characteristics,such as BVCEO＞6V and a DC current gain of 45 at 1kA/cm2 for an emitter size of 50μm × 50μm. The devices have a 40nm thick GaAsSb base with p-doping of 4. 5 × 1019cm-3 . Devices with an emitter size of 4μm × 30μm have a current gain variation less than 2% across the fully processed 100mm wafer. ft and fmax are over 50GHz,with a power efficiency of 50% ,which are comparable to standard power GaAs HBT results. These results demonstrate the potential application of GaAsSb/InP DHBT for power amplifiers and the feasibility of multi-wafer MBE for mass production of GaAsSb-based HBTs.     

Noise character analysis and the restraint of self-pulsation laser diodes

We calculate the Langevin noise sources of self-pulsation laser diodes, analyze the effects of active region noise and saturable-absorption region noise on the power fluctuation as well as period fluctuation, and propose a novel method to restrain the noise effects. A visible SIMULINK model is established to simulate the system, The results indicate that the effects of noise in absorption region can be ignored; that with the increase of DC injecting current, the noise effects enhance power jitter, and nevertheless, the period jitter is decreased; and that with external sinusoidal current modulating the self-pulsation laser diode, the noise-induced power jitter and period jitter can be suppressed greatly. This work is valuable for clock recovery in all-optical network.     

High-quality single-crystal CdSe nanoribbons and their optical properties

Large-scale synthesis of single-crystal CdSe nanoribbons is achieved by a modified thermal evaporation method, in which two-step-thermal-evaporation is used to control CdSe sources＇ evaporation. The synthesized CdSe nanoribbons are usually several micrometers in width, 50 nm in thickness, and tens to several hundred micrometers in length. Studies have shown that high-quality CdSe nanoribbons with regular shapes can be obtained by this method. Room-temperature photolumines-cence indicates that the lasing emission at 710 nm has been observed under optical pumping （266 nm） at power densities of 25-153 kW/cm^2. The full width half maximum （FWHM） of the lasing mode is 0.67 nm     

Propagation of hermite-cosh-gaussian beams passing through ABCD optical system with an annular aperture

By using the expansion of the aperture function into a finte sum of complex Gaussian functions, the corresponding analytical expressions of Hermite-cosh-Gaussian beams passing through annular apertured paraxially and symmetrically optical systems written in terms of ABCD matrix were derived, and they could reduce to the cases with squared aperture. In a similar way, the corresponding analytical expressions of cosh-Gaussian beams through annular apertured ABCD matrix were also given. The method could save more calculation time than that by using the diffraction integral formula directly.     

Influence of polarization extinction ratio on distributed polarization coupling detection

Distributed polarization coupling in polarization-maintaining fibers can be detected by using a white light Michelson interferometer. This technique usually requires that only one polarization mode is excited. However, in practical measurement, the injection polarization direction could not be exactly aligned to one of the principal axes of the PMF, so the influence of the polarization extinction ratio should be considered. Based on the polarization coupling theory, the influence of the incident polarization extinction on the measurement result is evaluated and analyzed, and a method for distributed polarization coupling detection is developed when both two orthogonal eigenmodes are excited.     

Call for Papers

正Communications—VLSI Researches and industries of telecommunications have been growing rapidly in the last 20 years and will keep their high growing pace in the next decade.The involved researches and developments cover mobile communications,highway and last-mile broadband communication,domain specific communications,and emerging D2D M2M communications.Radio communication steps into its