容积减影成像计算机自动化技术与实现  

Technique and Implementation of Automatic Volume Subtraction Imaging Computer Engineering and Applications

作　　者：杨朝辉[1] 杨秀军[2] 汪雪林 佟庆彬[1] Renno David 

机构地区：[1]北京交通大学,北京100044 [2]上海市第八人民医院放射科,上海200235 [3]北京握奇数据系统有限公司,北京100102

出　　处：《现代生物医学进展》2014年第9期1751-1755,共5页Progress in Modern Biomedicine

基　　金：北京市博士后科研活动经费资助(2011ZZ-50)

摘　　要：探讨在PC机上对容积CT灌注(CTP)源影像全自动生成减影CTP源影像的方法。首先在Windows XP操作系统中使用Matlab,对4层螺旋CTP源影像进行DICOM文件格式解析,获得CT成像设备的球管每转一周扫描层数及容积减影方法需要的其它参数信息,然后经过容积的CT值集合读、容积的CT值集合减以及容积的CT值集合写等几个步骤,生成减影CTP源影像的DICOM文件序列。使用该容积减影方法得到的减影CTP源影像,在定性肉眼观察和定量CT值矩阵比对上,与使用CT影像工作站上的减影软件手工逐层半自动减影得到的结果类同。容积减影方法实现了容积CTP源影像的自动化减影处理与成像,为最终形成一个一站式的减影CTP软件奠定了基础。To investigate a method of creating automatically source imaging data of Subtraction Computed Tomography Perfusion imaging （SCTP） from source volume data of CT Perfusion imaging （CTP） examination on personal computer （PC）. The volume subtraction imaging technique was implemented using Matlab on Windows XP platform. Through DICOM file format analysis for source imaging data of four slice spiral CT perfusion scan, this paper obtained layer number while ball tube of CT imaging device scanning a cycle as well as other parameters used in volume subtraction method firstly. After several steps of volume CT value set calculation including reading, subtraction and storage, this paper created source imaging data of SCTP with DICOM file format. Source imaging data of SCTP created by using volume subtraction method was similar to the semi-automatic subtraction results gotten layer by layer by means of subtraction software at workstation （AW 4.2） in two aspects of naked eyed observation and comparison with CT value matrices. Volume subtraction method can create automatically source imaging data of SCTP and establish a basis for the eventual formation of an all-in-one SCTP analysis software.

关 键 词：容积减影成像 DICOM 减影CT灌注 自动化 计算机 

分 类 号：R814.42[医药卫生—影像医学与核医学]