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PACS医学影像文件存储方法的研究

Study of the Methods for Storage of Medical Image Data in PACS

【作者】 刘仲明

【导师】 郑小林;

【作者基本信息】 重庆大学 , 生物医学工程, 2005, 硕士

【摘要】 医学影像的存储方法一直是PACS(Picture archiving and communication systems)解决方案的一项关键的技术,也是制约PACS 应用与发展的瓶颈。医学影像是医学临床诊断中应用最普遍、最重要的诊断依据之一,也是PACS系统在临床医学领域中得以迅速发展的原因。我国PACS 技术的研制和发展进入实质性阶段是近几年才开始的,但真正能做到图像信息共享和异地实时在线诊断的医院还为数不多,尤其是海量数据安全存储问题,一直是困扰PACS 快速发展的制约瓶颈,也有一些医院购买了一些国外的存储设备和存储管理软件,但这些软件片面追求大而全,造成功能上的浪费,而且价格昂贵,限制了其广泛应用。在实施PACS 的过程中需要解决许多技术问题,最主要的问题是传输、显示和影像存储。目前,各医院的网络系统一般主干都为光纤。另外,带高分辨显示的工作站价格逐渐下降,所以,传输和显示已不成为问题。而对图像信息归档存储的要求,是要能满足大量的数据快速存储和调用方便。因此,选择合适的存储方案就显得十分重要。本研究是在第三军医大学西南医院PACS 系统建设项目实施过程中,课题组在充分研究国内外PACS 系统解决方案的情况下,研究制定出的一套独特的分布式在线、近线和离线三级分级存储方法。依此方案建成的PACS 存储子系统,较为完美地将可在线存储10 年影像资料的磁带库、700G 的磁盘阵列和5 台IBM 高档服务器组成的存储归档系统与12 台BARCO 专业显示器、30 台SONY 显示器、41 套高档微机组成的诊断报告工作系统,千兆主干光纤网、影像采集和300 多台图像浏览工作站及原有的军字1 号软件系统实现无缝融合。由于三级存储设备容量配置科学合理,该存储系统既能满足海量影像数据的长期安全存储,又比进口国外的存储设备和存储管理软件价格低得多,相比之下,具有优越的性价比。现西南医院PACS 系统已接入放射科的2 台CR、2 台CT、1 台MRI、1 台CT/PET,超声科的4 台黑白B 超、5 台彩色B 超,消化科的6 台肠镜、胃镜,病理科的3 台电子病理切片显微镜,耳鼻喉科的1 台电子喉镜,放射肿瘤科的TPS 系统,1 台四肢关节成像、1 台X 线牙片机等影像设备,通过1 年多的运行,该存储系统设计合理、性能稳定、性价比良好,不失为大型综合性医院PACS 系统存储子系统的成功典范。国内许多大型综合性医院均来参观学习,受到了高度称赞。实践证明,从性价比和可靠性等方面考虑,分布式分级存储是实现PACS 影像数据长期保存的有效方法。本研究充分融入“集成就是创新”的设计理念,其设计方案及其研究成果,

【Abstract】 The storage approach for medical image data is one of the critical techniques in picture archiving and communication systems (PACS) and can also restrain PACS from its application and development. Medical imaging, one of the most important diagnostic bases in medical practice, is responsible for the rapid development of PACS in medical practice. In China, the research and development of PACS were in progress in the past few years, but there have been very few hospitals in which picture information sharing and far-distance real-time on-line diagnosis are available. The problem of safe storage of great quantity of data has been restraining PACS from its rapid development. In some hospitals, some overseas storage devices and storage management softwares were purchased, but the development of PACS was also restrained due to the waste of functions the expensive price. During the process of the application of PACS, many technical problems need to be solved, particularly problems such as transmission, display, and storage. Currently, the main line used in the network systems in most hospitals is characterized by the optical fiber. Besides, the price for workstations with high-resolution display is decreasing. As a result, transmission and display are no longer a problem, but picture archiving and storage requires rapid storage of enormous amount of data and convenient application of them. Therefore, it is of vital significance to select the appropriate scheme for storage of the enormous amount of data. In this study, based on the construction and execution of PACS in Southwest Hospital and the adequate analysis of the solutions in overseas PACS, we designed and developed a unique set of storage approaches, i.e. on-line, near-line, and off-line storage patterns. The sub-system of PACS established according to our scheme enables the connection of the archiving system consisted of on-line storage of image data for 10 years, 700 G disk array, and 5 IMB servers to the diagnostic report work system consisted of 12 specialized BARCO monitors, 30 SONY monitors, 41 computers, 1-G-optical fiber network, image collection, more than 300 picture scanning workstations, and the Hospital Information System 1 (HIS) of PLA (, Junzhi-1 software system). Because of the scientifically reasonable allocation of storage capacity, the safe long-term storage of enormous medical image data, and comparatively lower price as compared with that of the storage devices and storage management softwares, the three grading storage device designed and developed by us is of great advantages. In Southwest Hospital, PACS system has been connected to 2 CRs, 2 CTs, 1 MRI, and 1 CT/PET in the department of radiology, and 4 monocolored and 5 colored B-mode ultrasonographic machines in the department of ultrasonography, 6 enteroscopes and gastroscopes in the department of gastroenterology, 3 electronic microscope for pathological section, 1 electronic laryngoscope in the department of otorhinolaryngology, TPS system in the department of nuclear radiation medicine, 1 limb joint imaging machine, and 1 X-ray dental film machine. The 1-year operation proves that the storage system with stable functions and low price and high quality is designed reasonably and scientifically and is the successful model of sub-system of PACS system applied in large-scaled comprehensive hospitals. Visitors from other large-scaled comprehensive hospitals praised the system designed and developed by us. Practice has proved that allocated grading storage is the effective method for the long-term storage of image data in PACS regarding the low price and high reliability. In our study, we embodied the design concept of “integration is innovation”, based on which “the design scheme was from the clinical practice and research results would be practiced in clinical practice”. The design and development of our sub-system of PACS have synthesized the practical experience of clinicians and meet the requirements of examinations and treatment and long-term storage of enormous amount image data. The sub-system of PACS designed and developed by us is of super error tolerance and can solve the problem of recovery of image data, ensuring the recovery of on-line and near-line image data. The PACS storage system can also guarantee permanent unrestricted storage, quick in retrieval, and quick, convenient and reliable in storage and reading, could meet the requirements of long-term storage and management of enormous amount of medical imaging data.

  • 【网络出版投稿人】 重庆大学
  • 【网络出版年期】2006年 01期
  • 【分类号】R319
  • 【被引频次】9
  • 【下载频次】691
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