北京生物醫(yī)學(xué)工程

一種DICOM文件并行傳送算法的設(shè)計與實現(xiàn)

Design and Implementation of a Novel Parallel Transfer Algorithm of DICOM Files

作者：郭華源薛萬國

單位：中國人民解放軍總醫(yī)院計算機應(yīng)用與管理科（北京100853）

關(guān)鍵詞： DICOM文件；并行傳送；任務(wù)劃分策略；.NET framework 4

分類號：

出版年·卷·期（頁碼）：2011·30·2（178-182）

摘要：

DICOM文件傳送是PACS中非常重要的一類文件操作。本文通過分析DICOM文件傳送的基本原理，發(fā)現(xiàn)
DICOM文件串行傳送中有大量時間消耗在網(wǎng)絡(luò)連接和DICOM連接上。為了盡快完成海量影像文件的DICOM傳
送任務(wù)，本文從兩方面改進文件傳送算法：一是減少網(wǎng)絡(luò)和DICOM連接次數(shù)，每次連接盡量傳送更多的文
件；二是通過文件并行傳送來成倍增加單位時間內(nèi)文件傳送數(shù)量。然后針對PACS中待傳送DICOM文件特點
，設(shè)計一種基于任務(wù)劃分策略的DICOM文件并行傳送算法。該算法采用“一次DICOM連接傳送一類文件”
的傳送機制和“Master-Slave”結(jié)構(gòu)的集中式動態(tài)負載平衡方案。該算法在.NET framework 4框架下實
現(xiàn)，測試表明上述算法具有良好的并行性能，且顯著提高了DICOM文件傳送效率。

The DICOM files transfer played a vital role in PACS. Firstly we analyzed the
transfer characters of DICOM files and found out the reasons of time-consuming. Then we
tried to improve the transfer speed of mass amount of DICOM files from two aspects. The
first aspect, one way was to decrease the connection times between the network and
association. The other one was to speed up the files transfer through parallel mode. Next
we designed a novel parallel transfer algorithm for DICOM files based on the task partition
strategy, which took a mechanism of transfer mass files through one connection and a scheme
of centralized dynamic load balancing. At last, the algorithm was implemented in the
Microsoft .net framework 4. The test showed that the parallel transfer algorithm could do
better in parallel capability and also improved the DICOM file transfer efficiency
dramatically.

參考文獻：

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