关注IHE关键影像标记在PACS中的应用

关键影像标记通过指定一组事务处理的定义,将影像检查序列中一帧或多帧关键影像与其对应的注释信息进行关联。本文对该集成模型的角色、事务处理以及相关的DICOM内容进行了分析。     

DICOM通讯程序的设计

本文在研究DICOM协议的基础上，介绍了DICOM通讯的消息结构；从设计出发，分析了DICOM通讯过程的各个技术环节。     

全院PACS／HIS中影像科室工作流程的优化

在PACS实施中，合理构建影像科室工作流程是关键环节。取消预约、等片，在专业级显示器上进行读片和书写检查诊断报告，集中登记和打印检查诊断报告等工作流程在文中得到阐述。     

CT图像局域PACS的建立与应用

目的探讨建立CT图像局域PACS系统的方法。方法对于CT图像进行采集,通过局域网传输,实现CT图像资料的共享,诊断报告的打印,无胶片存储及管理。结果通过局域网PACS的建立,提高了图像的质量,实现了胶片存储及资源共享,一年可节约成本20多万元,提高了效益。结论局域PACS的建立可提高医院的医疗服务质量,并且具有明显的经济效益和社会效益,应用前景广阔。     

Benefits of the DICOM Structured Report

Recently, the digital imaging and communications in medicine (DICOM) standard introduced rules for the encoding, transmission, and storage of the imaging diagnostic report. This medical document can be stored and communicated with the images in picture archiving and communication system (PACS). It is a structured document that contains text with links to other data such as images, waveforms, and spatial or temporal coordinates. Its structure, along with its wide use of coded information, enables the semantic understanding of the data that is essential for the Electronic Healthcare Record deployment. In this article, we present DICOM Structured Report (SR) and discuss its benefits. We show how SR enables efficient radiology workflow, improves patient care, optimizes reimbursement, and enhances the radiology ergonomic working conditions. As structured input significantly alters the interpretation process, understanding all its benefits is necessary to support the change. Biography Rita Noumeir is a professor at the Department of Electrical Engineering of the University of Quebec, école de Technologie Superieure in Montreal. A founding member of the Imaging, Vision, and Artificial Intelligence Laboratory (LIVIA), her main research interest is the Healthcare Information Technology, specifically, Interoperability, Electronic Patient Record, Security, Information Confidentiality, and Image Processing. As a member of both Technical and Planning International IHE Radiology Committees, Dr. Noumeir took part over the last 5 years in developing many Integrating the Healthcare Enterprise (IHE) Integration Profiles in Radiology and in organizing several Integration Demonstrations. She is a cofounder of IHE Canada. Dr. Noumeir contributed to many research and development projects in collaboration with several Canadian and international companies in medical imaging and healthcare information. Currently, she collaborates with the Diagnostic Imaging Team of Canada Health Infoway to define the principles and architecture for sharing imaging information between multiple healthcare institutions. She plays a leading role in the development of this solution that is published as an IHE Integration Profile for which she is the editor. Rita Noumeir holds a Ph.D. and a Masters degree in Biomedical Engineering from école Polytechnique of Montreal specializing in Medical Imaging. She is a professional engineer, and a member of the Ordre des ingénieurs du Québec.     

Dosimetric Characteristics of the Siemens IGRT Carbon Fiber Tabletop

In this work, the dosimetric characteristics of a new commercial carbon fiber treatment table are investigated. The photon beam attenuation properties of the Siemens image-guided radiation therapy (IGRT) tabletop were studied in detail. Two sets of dosimetric measurements were performed. In the first experiment a polystyrene slab phantom was used: the central axis attenuation and the skin-sparing detriment were investigated. In the second experiment, the off-axis treatment table transmission was investigated using a polystyrene cylindrical phantom. Measurements were taken at the isocenter for a 360° rotation of the radiation beam. Our results show that the photon beam attenuation of the Siemens IGRT carbon fiber tabletop varies from a minimum of 2.1% (central axis) to a maximum of 4.6% (120° and 240° beam incidence). The beam entrance dose increases from 82% to 97% of the dose at the depth of maximum for a clinical 6-MV radiation field. The depth of maximum also decreases by 0.4 cm. Despite the wedge cross section of the table the beam attenuation properties of the IGRT tabletop remain constant along the longitudinal direction. American Association of Medical Dosimetrists.     

DICOM医学图像数据接口的Java实现

DICOM3.0标准作为目前通用的医学图像标准 ,最重要的特性之一在于其面向对象性。本研究依据这一重要特性 ,描述了如何使用面向对象的Java语言实现该标准的接口软件。从而解决了DICOM硬件设备与后继PACS处理软件的接口问题。同时 ,为了克服现有PACS系统的硬件瓶颈 ,对数据读入方式采取了优化 ,大大降低了CPU运行时间和内存占用空间 ,提高了系统的运行质量和性能。     

基于通用中间件接口服务器的远程医疗信息系统

在远程医疗信息系统共享平台的设计中,提出一种构建通用中间件接口服务器实现多家医院信息系统HIS与PACS的无缝连接方案。着重介绍了DICOM中间件、HL7消息中间件、生态识别和PKI技术在系统集成中的应用。     

DICOM医学图像的存储与管理

随着数字化医学成像设备在医院的广泛使用,对医学图像及相关数据的存档管理以及在不同科室之间的数据共享的要求越来越迫切,这就需要建立PACS(图像存档和通讯系统),这方面国外已经发展了很多年,我国目前处于起步阶段.本文参照PACS系统的一个已经被国际认可的医学图像标准即医学成像和通讯标准DICOM(digital imaging and communication in medicine),研究了标准的各个部分,特别是兼容性、信息对象定义(IOD)、服务对象对类(SOP)、数据编码等部分,就具体实现PACS系统的一个重要方面即医学图像的存档和管理做了深入的探讨,在此基础上建立了医学图像数据库系统,为实现医学图像信息的网络共享打下了基础.     

Automated Recognition of Lateral from PA Chest Radiographs: Saving Seconds in a PACS Environment

Images acquired in a two-view digital chest examination are frequently not electronically distinguishable. As a result the lateral and posterioanterio (PA) images are often improperly positioned on a PACS work station. A series of 1998 chest radiographs (999 lateral, 999 PA or AP) were used to develop a neural network classifier. The images were down-sampled to 16 × 16 matrices, and a feed-forward neural network was trained and tested using the leave-one-out method. Using five nodes in the hidden layer, the neural network correctly identified 987 of the 999 test cases (98.8%) (average of six runs). The simple architecture and speed of this technique suggests that it would be a useful addition to PACS work station software. The accumulated time saved by correctly positioning the lateral and PA chest images on the work station monitors in accordance with each radiologists hanging protocols was estimated to be about 1 week of radiologist time per year.