膠片按需打印技術研究及系統(tǒng)實現(xiàn)
發(fā)布時間：2019-03-08 09:17
【摘要】：膠片在傳統(tǒng)的放射科一直是醫(yī)學影像的主要載體。近年來,隨著RIS、PACS等信息系統(tǒng)的引入,膠片在醫(yī)院放射診斷上的作用正在逐步消失。但是在我國,患者流動性較大,他們往往會向醫(yī)院索取膠片,以便今后在跨院診療等場合中使用,因而膠片在很長一段時間內將繼續(xù)存在。由于僅有部分患者需要膠片,傳統(tǒng)的為每位患者打印膠片的方式不僅會帶來膠片的浪費,也會給護士增加分揀、分發(fā)膠片等繁雜工作,實現(xiàn)膠片按需打印的需求非常迫切。 在傳統(tǒng)的工作流程中,放射技師通常會在放射攝影后,在設備工作站上對影像進行必要的預處理和打印排版,并直接打印膠片。由于此時患者對膠片的需求并不明確,如何在不改變原有放射科工作流程的前提下實現(xiàn)按需打印是本論文面臨的主要問題。因此,本論文基于虛擬打印機技術實現(xiàn)膠片的按需打印�；谠摲椒�,放射技師仍然按照原有工作流程進行膠片打印操作,但數(shù)據(jù)并不發(fā)送給膠片打印機,而是發(fā)送到膠片虛擬打印機,由虛擬打印機進行歸檔,形成電子膠片。由于電子膠片本身已包含了預處理信息和打印排版信息,因此,一旦患者需要膠片,可在放射報告領取處通過護士直接操作或自助的形式調用打印服務把歸檔的電子膠片發(fā)送到膠片打印機完成實際的膠片打印。 本論文首先針對膠片按需打印的兩個關鍵技術開展研究。 ■DICOM打印雙向通訊。膠片虛擬打印機不但需接收來自設備工作站的電子膠片數(shù)據(jù),也要把數(shù)據(jù)發(fā)送給膠片打印機,因而需同時作為SCP和SCU角色實現(xiàn)DICOM打印的雙向通訊。DICOM打印是最復雜的DICOM通訊服務,而且不同設備工作站存在異構性,更增加了實現(xiàn)難度。為此,本論文在詳細分析DICOM丁印通訊原理的基礎上,提出了一種分層服務的設計方案,不但能實現(xiàn)DICOM打印的雙向通訊,而且能針對不同設備工作站的異構性進行自適應處理。 ■電子膠片患者信息識別。膠片虛擬打印機接收到電子膠片后,必須用患者號和檢查號進行標識,才能實現(xiàn)按需打印。由于以DICOM標準接收到的電子膠片數(shù)據(jù)中不包含結構化的患者號和檢查號,因而需用OCR技術從二進制影像數(shù)據(jù)中識別出這些信息。為此,本論文提出了一套基于Tesseract識別引擎,在膠片上識別患者號和檢查號的方法,該方法可通過檢查-患者匹配策略判別識別結果的正確性。 在上述關鍵技術研究基礎上,本論文研發(fā)了膠片按需打印系統(tǒng),具備完整的膠片虛擬打印機功能以及按需打印服務功能。系統(tǒng)已在溫州醫(yī)學院附屬第二醫(yī)院等地開展實踐應用,電子膠片的正確匹配率達到了96.5%,對膠片的節(jié)省率達到了14.8%。結果表明系統(tǒng)具有良好的可用性,能夠有效地減少膠片的浪費。
[Abstract]:Film has always been the main carrier of medical imaging in traditional radiology. In recent years, with the introduction of RIS,PACS and other information systems, the role of film in hospital radiology diagnosis is gradually disappearing. But in our country, the patients are more mobile, they tend to obtain the film from the hospital for future use in cross-hospital diagnosis and treatment and other occasions, so the film will continue to exist for a long time. Because only part of the patients need film, the traditional way of printing film for each patient will not only bring waste of film, but also increase sorting and distribution of film for nurses, so it is very urgent to realize the demand of film printing on demand. In the traditional workflow, radiographers usually pre-process and print the image on the equipment workstation after radiography, and print the film directly. Because the patients' demand for film is not clear at this time, how to print on demand without changing the original workflow of radiology is the main problem in this paper. Therefore, this paper based on virtual printer technology to achieve film printing on demand. Based on this method, radiographers still carry out film printing according to the original workflow, but the data is not sent to the film printer, but is sent to the film virtual printer, which is archived by the virtual printer to form electronic film. Since the electronic film itself already contains pre-processing information and print typesetting information, once the patient needs film, The archived electronic film can be sent to the film printer to complete the actual film printing through the direct operation or self-help of the nurse by calling the printing service at the receiving place of the radiation report. Firstly, two key technologies of film printing on demand are studied in this paper. DICOM print two-way communication. The film virtual printer needs not only to receive electronic film data from the equipment workstation, but also to send the data to the film printer. DICOM printing is the most complex DICOM communication service, and the heterogeneity of different equipment workstations makes it more difficult to implement DICOM printing. The two-way communication of DICOM printing needs to be implemented simultaneously as the roles of SCP and SCU. In this paper, based on the detailed analysis of the principle of DICOM print communication, a layered service design scheme is proposed, which can not only realize the bi-directional communication of DICOM printing, but also carry out adaptive processing for the heterogeneity of different equipment workstations. Electronic film patient information recognition. After the film virtual printer receives the electronic film, it must be identified with the patient number and the check number before it can be printed on demand. Since the electronic film data received by DICOM standard does not contain structured patient numbers and check numbers, it is necessary to recognize these information from binary image data by OCR technology. Therefore, this paper proposes a set of methods based on Tesseract recognition engine to identify patient number and check number on film. This method can distinguish the correctness of recognition result by check-patient matching strategy. On the basis of the above-mentioned key technologies, a film on-demand printing system is developed in this paper, which has the function of film virtual printer and on-demand printing service. The system has been applied in the second affiliated Hospital of Wenzhou Medical College. The correct matching rate of electronic film has reached 96.5% and the saving rate of film has reached 14.8%. The results show that the system has good usability and can effectively reduce the waste of film.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：R319
本文編號：2436662
[Abstract]:Film has always been the main carrier of medical imaging in traditional radiology. In recent years, with the introduction of RIS,PACS and other information systems, the role of film in hospital radiology diagnosis is gradually disappearing. But in our country, the patients are more mobile, they tend to obtain the film from the hospital for future use in cross-hospital diagnosis and treatment and other occasions, so the film will continue to exist for a long time. Because only part of the patients need film, the traditional way of printing film for each patient will not only bring waste of film, but also increase sorting and distribution of film for nurses, so it is very urgent to realize the demand of film printing on demand. In the traditional workflow, radiographers usually pre-process and print the image on the equipment workstation after radiography, and print the film directly. Because the patients' demand for film is not clear at this time, how to print on demand without changing the original workflow of radiology is the main problem in this paper. Therefore, this paper based on virtual printer technology to achieve film printing on demand. Based on this method, radiographers still carry out film printing according to the original workflow, but the data is not sent to the film printer, but is sent to the film virtual printer, which is archived by the virtual printer to form electronic film. Since the electronic film itself already contains pre-processing information and print typesetting information, once the patient needs film, The archived electronic film can be sent to the film printer to complete the actual film printing through the direct operation or self-help of the nurse by calling the printing service at the receiving place of the radiation report. Firstly, two key technologies of film printing on demand are studied in this paper. DICOM print two-way communication. The film virtual printer needs not only to receive electronic film data from the equipment workstation, but also to send the data to the film printer. DICOM printing is the most complex DICOM communication service, and the heterogeneity of different equipment workstations makes it more difficult to implement DICOM printing. The two-way communication of DICOM printing needs to be implemented simultaneously as the roles of SCP and SCU. In this paper, based on the detailed analysis of the principle of DICOM print communication, a layered service design scheme is proposed, which can not only realize the bi-directional communication of DICOM printing, but also carry out adaptive processing for the heterogeneity of different equipment workstations. Electronic film patient information recognition. After the film virtual printer receives the electronic film, it must be identified with the patient number and the check number before it can be printed on demand. Since the electronic film data received by DICOM standard does not contain structured patient numbers and check numbers, it is necessary to recognize these information from binary image data by OCR technology. Therefore, this paper proposes a set of methods based on Tesseract recognition engine to identify patient number and check number on film. This method can distinguish the correctness of recognition result by check-patient matching strategy. On the basis of the above-mentioned key technologies, a film on-demand printing system is developed in this paper, which has the function of film virtual printer and on-demand printing service. The system has been applied in the second affiliated Hospital of Wenzhou Medical College. The correct matching rate of electronic film has reached 96.5% and the saving rate of film has reached 14.8%. The results show that the system has good usability and can effectively reduce the waste of film.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：R319
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