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  • 學位論文

以服務導向架構改善醫學影像儲存與傳輸系統之後端品質管理流程

THE BACKEND QUALITY CONTROL PROCESS IMPROVEMENT OF MEDICAL PICTURE ARCHIVING AND COMMUNICATION SYSTEM USING SERVICE-ORIENTED ARCHITECTURE

指導教授 : 王永心
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摘要


在數位醫學影像技術領域中,醫療儀器及影像儲傳管理供應商以醫療數位影像通訊標準(DICOM)為基礎,建構醫學影像儲傳系統(PACS),打造合乎整體醫療檢查環境。雖然PACS遵循DICOM標準並且提供低成本的儲存空間和方便的影像查詢及顯示,但是影像的品管仍依賴經驗豐富的醫療檢查人員,無法保有一致性的水準。品質不良或錯誤的影像會讓打報告的醫師或是臨床醫師判斷錯誤造成誤診,導致對病患產生嚴重傷害。因此,需要一個良好的品質管理系統,包括影像作廢的功能。 本研究的重點在於後端品質管理流程的改善,包括影像資料查詢和作廢功能。自主開發的影像作廢系統很難與不同供應商所開發的影像儲傳伺服系統或影像刪除系統做整合。所面臨的問題包括:(1) 子系統之間緊密耦合修改不易、(2) 不同的供應商對於影像刪除系統有自己的做法,難以整合、(3) 不同的影像儲傳伺服系統採用不同的資料庫或資料定義的方式、表格、欄位不同。因此,本研究利用服務導向架構 (SOA) 分析原有的後端品質管理流程,並建立一個新的服務分層抽象模型分離業務和技術來實現系統的鬆散耦合,增加服務的再用性和擴展系統敏捷性。加入新的影像儲傳伺服系統時,可以有效重用網路服務從而減少開發時間和系統整合成本。系統亦建立類似之 C-DELETE Service Class以符合 DICOM 精神,為日後擴展做準備。一旦新的刪除標準發佈後,系統可以容易地抽離更換相關的服務來完成相同的功能,而不會影響原始介面,有利於程式的開發與閱讀,之後維護也變簡單。

並列摘要


In the area of digital medical imaging technology, efforts are made to integrate various medical devices into a PACS (Picture Archiving and Communication System) that complies with the DICOM (Digital Imaging and Communications in Medicine) standard in order to promote the overall medical examination quality. However, although PACS follows DICOM and provides economical storage of, and convenient access to, images from multiple modalities, the quality of images still relies on experienced radiologist to control and the consistent level cannot be assured. Bad or incorrect images will lead to a misjudgment from reporting or clinical physicians and cause patients serious hurt. Therefore, a good quality management system that includes image voidance is needed. This study focuses on the improvement of backend quality control process including functions of image query and voidance. It is difficult to integrate self-developed image voidance system with those of various vendors. Problems faced include (1) subsystems are tightly coupled that makes code modification hard, (2) individual deletion systems have their own operating methods and are difficult to integrate, (3) the deletion systems adopt different databases or data formats. This study thus takes advantage of SOA (Service-oriented Architecture) to analyze the original backend quality control process and establish a new service layer abstraction model that separates business and technology to achieve system loose coupling, increase service reusability, and promote system agility. When new PACS is to be joined, it is easy to find common Web services to reuse thus reducing the development time and cost of system integration. A similar C-DELETE service class is created that conforms to the spirit of DICOM for future extension. The realization of SOA layered architecture also simplifies system maintenance.

並列關鍵字

Process Improvement PACS DICOM SOA Web Service

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