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DICOM閱片工作站圖像處理算法的設計與實現(xiàn)
摘 要
隨著PACS(圖像存儲與通信系統(tǒng))的普及，作為PACS的核心的DICOM(醫(yī)學數(shù)字成像及通信)標準變得越來越重要。DICOM是用于醫(yī)學圖像和通信的國際標準，它規(guī)范了醫(yī)學圖像及各種數(shù)字信息在異構系統(tǒng)和設備之間存儲、傳送時的文件格式和語義描述。
論文首先介紹了DICOM 3.0標準，系統(tǒng)地分析了DICOM對象關系和文
2、件格式，主要闡述了數(shù)據(jù)元和數(shù)據(jù)集的格式，然后構造了整個閱片工作站的5功能模塊。論文提出嚴格按照順序讀取DICOM字段的做法，盡量減少訪問DICOM文件的時間以加快讀取DICOM文件信息的算法效率；論文中引入斜率和偏移量這兩個概念，簡化了VOI LUT（興趣值查找表）轉(zhuǎn)換的線性插值函數(shù),并采用將實數(shù)乘除轉(zhuǎn)化為整數(shù)運算的方法簡化線性映射函數(shù)，從而加快了圖像縮放的速度；論文最后詳細描述了圖像測量和標注用到的類和函數(shù)，并分析了具體的測量和標注操作的實現(xiàn)步驟。
論文最終完成了1個具備瀏覽、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計，實現(xiàn)了1個小型DICOM閱片工作站。
關鍵詞
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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計與實現(xiàn)
