基于DICOM标准的增强型体外反搏波形的压缩和存储  

The Compression and Storage of Enhanced External Counterpulsation Waveform Based on DICOM Standard

作　　者：胡丁[1] 谢树群[1] 余冬兰[1] 郑振声[2] 王奎健[1] 

机构地区：[1]中山大学中山医学院生物医学工程系,广州510080 [2]中山大学附属第一医院,广州510080

出　　处：《生物医学工程学杂志》2010年第2期411-415,共5页Journal of Biomedical Engineering

基　　金：国家自然科学基金资助项目(31270010)

摘　　要：随着基于数字影像和通信(digital i maging and communications in medicine,DICOM)标准的体外反搏局域网系统和基于可扩展标记语言(extensible markuplanguage,XML)的远程体外反搏信息系统的建立和完善,体外反搏医学信息正逐步实现数字化的管理和共享。为了节省存储空间和提高传输效率,需要对长时间采集的反搏数据压缩并标准化存储。本文针对具有双通道采集、信号相关性强等特点的增强型体外反搏(enhanced external counterpulsation,EECP)数据设计了改进的模板匹配和快速折线距离阈值拟合(linear approxi mation distance threshol-ding,LADT)变换相结合的压缩算法,并结合DICOM标准定义了压缩波形的私有传输语法,通过调用波形写入模块将压缩数据存储为DICOM格式文件。经过实验和调试,在本EECP实验室中成功实现了EECP采集数据的压缩、解压以及在EECP工作站之间的正确传输和显示。The development of external counterpulsation（ECP） local area network system and extensible markup language（XML）-based remote ECP medical information system conformable to digital imaging and communications in medicine（DICOM） standard has been improving the digital interchangeablity and sharability of ECP data.However,the therapy process of ECP is a continuous and longtime supervision which builds a mass of waveform data.In order to reduce the storage space and improve the transmission efficiency,the waveform data with the normative format of ECP data files have to be compressed.In this article,we introduced the compression arithmetic of template matching and improved quick fitting of linear approximation distance thresholding（LADT） in combimation with the characters of enhanced external counterpulsation（EECP） waveform signal.The DICOM standard is used as the storage and transmission standard to make our system compatible with hospital information system.According to the rules of transfer syntaxes,we defined private transfer syntax for one-dimensional compressed waveform data and stored EECP data into a DICOM file.Testing result indicates that the compressed and normative data can be correctly transmitted and displayed between EECP workstations in our EECP laboratory.

关 键 词：增强型体外反搏 DICOM标准 波形压缩 传输语法 

分 类 号：R318.0[医药卫生—生物医学工程]