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DICOM閱片工作站圖像處理算法的設(shè)計(jì)與實(shí)現(xiàn)
摘 要
隨著PACS(圖像存儲(chǔ)與通信系統(tǒng))的普及，作為PACS的核心的DICOM(醫(yī)學(xué)數(shù)字成像及通信)標(biāo)準(zhǔn)變得越來(lái)越重要。DICOM是用于醫(yī)學(xué)圖像和通信的國(guó)際標(biāo)準(zhǔn)，它規(guī)范了醫(yī)學(xué)圖像及各種數(shù)字信息在異構(gòu)系統(tǒng)和設(shè)備之間存儲(chǔ)、傳送時(shí)的文件格式和語(yǔ)義描述。
論文首先介紹了DICOM 3.0標(biāo)準(zhǔn)，系統(tǒng)地分析了DICOM對(duì)象關(guān)系和文
2、件格式，主要闡述了數(shù)據(jù)元和數(shù)據(jù)集的格式，然后構(gòu)造了整個(gè)閱片工作站的5功能模塊。論文提出嚴(yán)格按照順序讀取DICOM字段的做法，盡量減少訪問(wèn)DICOM文件的時(shí)間以加快讀取DICOM文件信息的算法效率；論文中引入斜率和偏移量這兩個(gè)概念，簡(jiǎn)化了VOI LUT（興趣值查找表）轉(zhuǎn)換的線性插值函數(shù),并采用將實(shí)數(shù)乘除轉(zhuǎn)化為整數(shù)運(yùn)算的方法簡(jiǎn)化線性映射函數(shù)，從而加快了圖像縮放的速度；論文最后詳細(xì)描述了圖像測(cè)量和標(biāo)注用到的類和函數(shù)，并分析了具體的測(cè)量和標(biāo)注操作的實(shí)現(xiàn)步驟。
論文最終完成了1個(gè)具備瀏覽、縮放、灰度調(diào)整、文件保存功能的小型閱片工作站的算法設(shè)計(jì)，實(shí)現(xiàn)了1個(gè)小型DICOM閱片工作站。
關(guān)鍵詞
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DICOM；窗寬和窗位；平滑處理；線性插值
Abstract
With the popularization of PACS (Picture Archiving and Communica- tion System), as the kernel of PACS, DICOM (Digital Imaging and Communication in Medicine) become increasingly important. DICOM is an international standard in medical imaging and communications.
4、 It defines the rules of pixel data and other digital information when they are transferred or stored between devices with different operating systems or of different manufacturers.
This paper first introduces the DICOM 3.0 file format, analyzes object connection and file format of DICOM systematic
5、ally，expatiates Data Set and Data Element mostly and then conformation five modules of Image Browse Workstation. Paper puts forward the method of read DICOM field in term of sequence, reduces the time of read DICOM file in order to mend the arithmetic efficiency of read DICOM file information. Paper
6、 introduces two concept, slope and shift, reduces the linear interpolation function of VOI LUT (Value of Interest Look Up Table), and uses the way of make real number operation into integer operation to simplification the linear map function, thereby makes the image zoom speed up. Paper depicts the
7、class and function of image measure and label particular at last, and analyses actualize step of the operation of measure and label.
Paper achieves the algorithm design of a small Image Browse Workstation with the function of browse, zooms, grey level transformation, file save, and achieves a small DICOM Image Browse Workstation.
Keywords
DICOM；Window Width and Window Center； smoothing processing； linear interpolation
DICOM閱片工作站圖像處理算法的設(shè)計(jì)與實(shí)現(xiàn)
