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目的:实现基于DICOM标准的医学图像和数据管理系统。方法:利用Visual C++.NET、LeadToolsV14.5和SQL Server2000,在Windows XP环境下,建立一个基于DICOM标准的医学图像数据管理系统。结果:对DICOM标准的图像数据进行存储与读写,正确读出与显示所存储的图像文件,并对用户建立权限控制。结论:该系统维护简便、操作方便,具有方便快捷的查询功能。 相似文献
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目的:探讨适合院情的PACS系统的设计与实施。方法:CT、MRI等影像设备连接成医学数字影像传输(DICOM)网络;DICOM服务器与各图像浏览及诊断报告书写终端连接成PACS。结果:成功地实现了数字化图像在PACS内的传送、中心存储、不同操作系统(UNIX和Windows NT)不同格式图像在DICOM3.0标准水平的相互兼容和影像交流。以及PACS内影像诊断报告的书写、共享、打印等功能。结论:一个先进的适合院情的PACS应该具备实用性、标准性、经济性、兼容性、开放性,而且界面友好,使用方便,具有强大的图像后处理功能。系统框架合理先进,稳定性好,维护方便。 相似文献
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CT图像数据的数字化获取及存储 总被引:1,自引:0,他引:1
目的 研制Siemens Somatom DR3 CT图像数据的数字化获取及存储。方法 通过分析存储DR3 CT图像数据的磁光盘的文件结构及图像数据存储格式,找出其主要特征。在DOS平台下编写设备驱动程序,实现DOS下对DR3 CT磁光盘的读、写。结果 实现了对DR3 CT图像数据的全数字化获取及极低成本存储。结论 与用扫描仪、视频模拟采集卡等通过模数转换方式间接从CT图像获取CT图像数据以及CT图像的胶片和磁光盘保存相比,这种方案无任何信息损失,存储成本低,有很高的性能价格比。 相似文献
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介绍了一种在嵌入式Linux平台下实现数字化B超DICOM接口的方法,能够将B超图像直接生成符合DICOM标准的DCM文件,并能以DICOM通信协议在PACS网络交换消息。 相似文献
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医学影像存档与通讯系统的开发与应用 总被引:2,自引:7,他引:2
目的 组建简便医学影像存档与通讯系统及通过PACS实现影像诊断设备的网络化,诊断报告书写计算机化、标准化。方法CT、MRI、DR、CR、DSA和通过工作站连接成医学数字影像传输(DICOM)网络;DICOM服务器与各图像浏览及诊断报告书写终端连接成以太网(Ethernet)网络;二者再通过集线器连接成PACS。结果成功地实现了数字化图像在PACS内的传送、中心存储、异机图像处理,不同操作系统(UNIX和Windows 2000)、不同格式图像(Adv和Dic)在DICOM3.0标准水平的相:互兼容和图像交流,以及诊断报告的书写与共亨打印等功能。结论PACS提高了工作效率及管理水平,推动了医生工作模式的变革;方便了工作、科研和学习;提高了教学质帚。规范化、计算机化的诊断报告质量优于人工书写报告。 相似文献
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Masero V Moreno J Silva A Andres F Chambel J Uson J 《Journal of telemedicine and telecare》2000,6(Z2):S94-S96
We have developed a system for remote three-dimensional reconstruction, which facilitates telediagnosis. The telereconstruction system is based on a computerized tomography (CT) scanner, a workstation connected to the CT scanner, a PC, which can be geographically far away from the workstation, and a computer program that we have developed. The workstation allows CT images to be stored and image processing to be carried out. The PC permits the user to control the workstation in making a three-dimensional reconstruction and allows the remote user to see that reconstruction. From the PC various graphical operations can be performed on the three-dimensional model, such as rotations, translations and cuts through the model. The program therefore allows a remote user to have three-dimensional images and to study them by means of all the options the program provides. 相似文献
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Mitsuru Ikeda Reiko Makino Kuniharu Imai 《Australasian physical & engineering sciences in medicine / supported by the Australasian College of Physical Scientists in Medicine and the Australasian Association of Physical Sciences in Medicine》2012,35(4):475-483
We have proposed a direct evaluation method concerning preservation of noise-free components for image noise reduction. This evaluation method is to graphically estimate how well a noise-reduction method will preserve noise-free image components by using the normal probability plot of the image pixel value difference between an original image and its noise-reduced image; this difference is equivalent to the “method noise” which was defined by Buades et al. Further, by comparing the linearity of a normal probability plot for two different noise reduction methods, one can graphically assess which method will be more able to preserve the noise-free component than the other. As an illustrative example of this evaluation method, we have evaluated the effectiveness of the spatially-adaptive BayesShrink noise-reduced method devised by Chang et al., when applied to chest phantom CT images. The evaluation results of our proposed method were consistent with the visual impressions for the CT images processed in this study. The results of this study also indicate that the spatially-adaptive BayesShrink algorithm devised by Chang et al. will work well on the chest phantom CT images, although the assumption for this method is often violated in CT images, and the assumption postulated for the spatially-adaptive BayesShrink method is expected to have sufficient robustness for CT images. 相似文献
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Ackerly T Geso M O'Keefe G Smith R 《Australasian physical & engineering sciences in medicine / supported by the Australasian College of Physical Scientists in Medicine and the Australasian Association of Physical Sciences in Medicine》2004,27(3):136-147
This paper is motivated by a clinical requirement to utilise ictal SPECT images for target localisation in stereotactic radiosurgery treatment planning using the xknife system which only supports CT and MRI images. To achieve this, the SPECT images were converted from raw (pixel data only) format into a part 10 compliant DICOM CT fileset. The minimum requirements for the recasting of a raw format image as DICOM CT or MRI data set are described in detail. The method can be applied to the importation of raw format images into any radiotherapy treatment planning system that supports CT or MRI import. It is demonstrated that the combination of the low spatial resolution SPECT images, depicting functional information, with high spatial resolution MRI images, which show the structural information, is suitable for stereotactic radiosurgery treatment planning. 相似文献
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目的:在鼻咽癌图像引导调强放疗中,采用4种不同解剖区域进行图像配准,研究分析4种配准方法对鼻咽癌体位误差的影响。方法:应用Varian23IX IGRT系统对17例鼻咽癌患者治疗时进行图像采集,选择颅底(A方法)、颈椎1~3(B方法)、下颌骨(C方法)和整体配准(D方法)等4种方法对CT-CBCT图像进行在线或离线配准,分别分析4种配准方法造成的线性误差(Vrt,Lng,Lat)及旋转误差(Pitch,Roll,Rtn)。结果:由于应用A、B、C等3种配准方法时,所选兴趣区域较小,只分析了各自区域的误差,故误差略大于D方法;且部分区域(如下颌骨)在摆位时会随后仰状态而变化,Lng误差略高于A和C方法;颈椎C1~C3也会随颈部的扭动而变化,旋转误差略高于A和C方法。而D方法所选兴趣区域较大,在线配准时可以对各兴趣区域信息进行整合,寻找较均衡的分析结果,配准结果较好。结论:图像引导放射治疗在鼻咽癌放疗中可以在线纠正摆位误差以提高放疗的精度,整体配准方法配准结果较好。 相似文献
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医学图像可以为医生提供准确和全面的病患信息。由于人体因各种疾病引起的形态或功能异常可以表现在很多方面,MR图像和CT图像能重点呈现出患者不同组织结构的医学图像数据,但单独的MR图像或者CT图像不能全面反应出疾病的复杂性。MR图像预测CT图像属于医学图像跨模态预测的一种,将MR图像预测CT图像的方法分为4类,基于图集的方法、基于图像分割的方法、基于学习的方法和基于深度学习的方法。本文对MR图像预测CT图像的各类方法、存在问题和未来发展方向进行综述,得出结论基于深度学习的方法应是未来跨模态预测的主要方法。 相似文献
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本文介绍了一种多功能计算机阅片系统及其在临床和医学教育中的应用,该系统能对标准教学片进行数字化存贮和管理,教学时,教师可任意调出存贮在计算机中的图像,由若干个图像监视器同时显示,供学生观看,该系统具有丰富的图像处理软件,在临床上可作为图像分析和处理的工具,由于系统成本低,功能多,适合我国国情,值得在医学领域推广应用。 相似文献
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目前CT已成为疾病诊断的一种重要手段。与常规CT相比,能谱CT最显著的特征就是提供了多种定量分析工具与多参数成像为基础的综合诊断模式,如基物质图像、单能量图像、能谱曲线等。其独特的多参数成像模式给长期习惯于单一诊断模式的影像科医生提出了前所未有的挑战,熟悉其成像原理、影像表现与应用价值是非常必要的。本文首先回顾了能量CT研发的必要性及其实现途径;随后深入剖析了单源瞬时kVp切换能谱成像的物理基础,并介绍了实现该技术所必需的解析技术;接着从基础实验的角度,展现了能谱成像能够在更低剂量条件下保证同常规CT一致的图像质量。 相似文献
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Ackerly T Andrews J Ball D Binns D Clark R D'Costa I Hicks RJ Kenny M Lau E MacManus M Song G 《Australasian physical & engineering sciences in medicine / supported by the Australasian College of Physical Scientists in Medicine and the Australasian Association of Physical Sciences in Medicine》2002,25(2):67-77
Recent clinical experience at Peter MacCallum Cancer Institute (PMCI) with the use of unregistered Positron Emission Tomography (PET) images for radiotherapy target marking in the lung suggests that co-registered PET images would be invaluable. PMCI has three radiotherapy treatment planning systems but none of them currently is able to display or co-register PET images with Computed Tomography (CT) images. This paper details the approach taken to display co-registered PET images with the CADPLAN treatment planning system. CT Image files are normally transferred to Cadplan by DICOM transfer, but the Cadplan DICOM server will not receive (has no presentation context for) PET images. The fundamental design of the CADPLAN system envisages display of only a single image dataset, which must be a CT scan for planning reasons. The problem of data transfer is crudely solved by File Transfer Protocol (FTP) over the network. Fortunately the multislice format of the PET image files makes individual transfer manageable. A menu based C program running at the same time as Cadplan is invoked to sample the DICOM PET Image and create multiple Cadplan CART image format files that are co-registered with each existing transverse CT slice. With the Cadplan in contour mode, the program allows the co-registered PET images to be swapped in and out of the image section of the CART files promptly, while keeping the contour information. This allows radiotherapy target volumes to be marked using transverse PET emission images, and effectively circumvents the design constraints prohibiting the display of more than one image set. Contours can be over-laid for review on reconstructed sagittal or coronal views of CT or PET images constructed using the standard Cadplan tools. Co-registration is facilitated by identical positioning with the aid of lasers and FDG loaded fiducial markers on the PET scanner and CT couch. A polyurethane cast fixed with EFFILOCK is used to ensure identical patient orientation on the CT and PET couches. Since both imaging modalities are without significant geometric distortion the co-registration is then simply a translation. PET transmission images can be used for co-registration verification. The practical implementation of display of PET images with CADPLAN has enabled us to begin a trial of 10 patients, the results of which will be reported separately. 相似文献