医学图像传输协议DICOM标准的运行机制

医学影像归档及通信系统(PACS)是国内医学数字图像处理及传输领域的一个研究热点.数字成像及通信协议(DICOM3.0)是医学数字图像及传输领域的国际标准,几乎所有的医疗设备都支持DICOM协议.主要探讨PACS底层图像传输服务--DICOM协议的运行机制,说明PACS系统如何实现图像的归档和通讯.     

DICOM医学图像格式转换的VC 实现

DICOM3.0是医学影像存储和传输的国际标准,它是随着图像化、计算机化的医疗设备的普及和医院管理信息系统(PACS)和远程医疗系统的发展应运而生.DICOM的定制为不同的医学影像设备和用户提供了统一的接口标准和交互协议.DICOM医学图像在CT、MR、医院PACS系统中应用广泛.编程实现DICOM医学图像格式转换,对医学影像技术的研究具有重要的意义.     

DICOM医学图像的存档管理和传输技术的研究

作者就PACS系统的核心技术———医学图像的存档管理和传输进行了研究,构建了基于DICOM标准的3层医学图像数据库系统,实现了医学图像的快速、高效查询和即时显示,并利用FTP传输协议实现了医学图像的远程传输.其研究结果可为开展远程医疗服务提供技术支持,并对建设现代数字医院具有参考价值.     

B超影像采集工作站及DICOM接口设计与实现

为解决医院模拟B超诊断仪能够接入现有PACS系统 ,适应数字化与信息化发展 ,介绍一种基于PACS系统的B超影像采集工作站及其设计与实现 本系统作为B超诊断仪与PACS系统联接钮带 ,重点解决了B超图像的采集 ,存储与传输 在采集方面根据标准视频输入可实现单帧与动态多帧采集 ;在存储方面图像采用了标准DICOM图像格式 ;在传输方面采用了DICOM传输标准 ,实现了B超图像以DICOM规范与PACS系统进行数据传输 ,符合国际医学图像存储与传输标准 ,有利于B超影像工作站方便接入PACS系统 ,推动PACS系统在我国的发展 ,同时工作站增加了图像的后处理算法与数据库的管理 ,有利于医师的临床诊断与数据库管理     

数字医疗图像的显示技术及实现

本文介绍了医学数字图像及通信标准(DICOM),并对标准中的显示部分做了相关研究.在医疗图像存档和传输系统(PACS)中,应用该标准实现了数字化医疗图像的读取及显示技术.     

基于DICOM医学图像软件工具包的设计和实现

DICOM(医学数字成像及通信)是PACS(图像存储与通信系统)网络内各系统互联的基础，也是用于统一各种数字化影像设备的图像格式和数据传输的标准、本文根据的开发经验，介绍了符合DICOM3．0标准的医学图像文件格式，并详细描述了设计DICOM软件工具包的实现过程。     

静态DICOM医学图像与常规图像格式的相互转换

为了使得非医学数字成像与通讯(DICOM)标准的设备产生的图像也能与符合DICOM标准的图像存档与通讯系统(PACS)融合,需要两者之间进行文件格式的转换.通过深入了解DICOM医学图像与常规图像格式的特点,分别提取和构造二者文件信息,开发了一种在DICOM文件与非DICOM文件间进行格式转换的软件,该软件已成功应用在安徽省立医院等多家医院的PACS系统中.结果表明可以在实现DICOM医学图像与常规图像格式互换的同时,保证不丢失图像信息,可以基本满足实际需要.     

基于DICOM协议的PACS验证与存储服务模块的研究

DICOM标准的技术实现是PACS系统开发设计的关键之一,利用可视化集成开发工具VC 6.0基于Windows编写了单独的基于DICOM的医学图像的验证存储功能的程序,为构建比较完整的PACS提供了充分的条件。     

PACS系统和三维可视化关键技术的研究

针对当前基于医学PACS研究存在的不足,对PACS的每个具体功能进行了设计和实现,特别是实现了DICOM图像在互联网上的查询、传输和显示.对系统中重要的关键部分做了分析探讨,实现了一个完整的PACS和图像的三维显示、分割、配准等功能.在Mitk的基础上进行的二次开发,能有效地缩短PACS的开发周期,并使得系统具有更高的...     

基于数据网格的PACS存储管理

利用GLOBUS TOOLKITS 4.0(GT4)来构建ACS(医产像归档和传输系统)的分布式图像归档管理系统,实现了对医学影像数据的虚拟化管理.GT4包含了用来构建数据网格的许多组件,如网格传输协议Grid-FTP、辅助存储全局访问GASS、副本定位服务RLS等.系统的设计思路是利用这些网格工具组件来构造一种可伸缩开放的,虚拟化的存储系统框架.为PACS应用提供一个高效、稳定和安全的存储管理平台,满足现在和未来医院对大容量医学图像数据的存储需求.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that