Online annotation tool for digital mammography

RATIONALE AND OBJECTIVES: To develop a software tool for radiologists to annotate mammograms online. MATERIALS AND METHODS: The tool is web-based with a Java development environment and composed of a Digital Image and Communication in Medicine (DICOM) image viewer, a clinical information collector, and a database. The use of the tool with a sample case is demonstrated in this article. RESULTS: An online tool for the annotation of digital mammograms for teaching and research purposes has been developed. CONCLUSION: This annotation tool can be used to provide an annotated-case library on mammography education for residents and fellows.     

模拟定位机的技术改造

模拟定位机是医院放疗科所必备的医疗设备。为使没有标准DICOM接口的旧式模拟定位机设备能实现其影像资料输出到Eclipse三维计划计算系统中,必须对其进行数字化改造。本文阐述了对其外界接口的改造方法及使用方法,在较好的性价比下满足临床的应用。     

Introduction to Grayscale Calibration and Related Aspects of Medical Imaging Grade Liquid Crystal Displays

Consistent presentation of digital radiographic images at all locations within a medical center can help ensure a high level of patient care. Currently, liquid crystal displays (LCDs) are the electronic display technology of choice for viewing medical images. As the inherent luminance (and thereby perceived contrast) properties of different LCDs can vary substantially, calibration of the luminance response of these displays is required to ensure that observer perception of an image is consistent on all displays. The digital imaging and communication in medicine (DICOM) grayscale standard display function (GSDF) defines the luminance response of a display such that an observer's perception of image contrast is consistent throughout the pixel value range of a displayed image. The main purpose of this work is to review the theoretical and practical aspects of calibration of LCDs to the GSDF. Included herein is a review of LCD technology, principles of calibration, and other practical aspects related to calibration and observer perception of images presented on LCDs. Both grayscale and color displays are considered, and the influence of ambient light on calibration and perception is discussed.     

CT数字影像介质交换和联机通讯的实现

对医学数字图像标准进行了讨论，在此基础上利用磁介质交换方法和建立PC机与CT系统的网络通讯方法，成功地获取CT原始数字图像，通过将原CT格式转换为DICOM标准格式，实现在PC平台上读取CT数字图像     

直热式干式打印机的原理和临床应用

在医院集中式DICOM医用打印系统中，一台高速打印机往往连接着多台DICOM主机。各主机对输出图像的质量要求不同，所以要求打印机端适应主机的要求，控制打印图像质量，得到令人满意的胶片输出。本文以AGFADrystar5503干式打印机为例探讨直热式干式打印技术的原理和临床上的实际应用。直热式干式打印机能够输出连续的色调、丰富的灰阶与高质量的空间分辨率的优质图像，而且具备结构优化、性能稳定、出片速度较快、更环保等优点。     

论医学图像存储与通讯系统（PACS）的设计与实现

医学图像存储与通讯系统（PACS）是医学影像领域的新技术革命，是医院信息化建设的重要组成部分。DICOM协议推动了PACS的产业化进程。本文就PACS的设计、实现、运行管理等方面的内容予以讨论。     

医学成像和通讯系统的CORBA设计方案

针对目前医学信息系统的异构带来了彼此之间通讯和信息共享的困难 ,对象管理组 (OMG)制定了CORBAMed软件规范 ,规定了医学信息系统的软件架构 ,定义各种服务的接口。本文尝试将 CORBA应用于医学图像存档和通讯系统 ,提出 CORBA解决方案的 PACS系统模型 ,分析了软件系统的视图层次 ,最后讨论了CORBAMed的相关服务。     

3D printing in designing of anatomical posterior column plate

Background

Acetabulum has a complex anatomy due to which anatomical acetabular plates are still under developmental phase. Although intra-operative contouring of reconstruction plate is done as a standard practice, it is associated with increased operative time and morbidity of patient. We have designed an acetabular plate for posterior fixation from experience of previous studies performed in our institute on acetabular fracture fixation which should be appropriate for most of the patient of Indian origin. Apart from avoiding intra-operative contouring of acetabular plates it also helps in preventing intra articular screw penetration.

应用快速成型技术制作人体肩胛骨骨折模型

目的将快速成形技术应用于骨科领域，为骨科医学的发展提供了一个崭新的手段。方法通过螺旋CT得到整个肩胛骨的二维CT影像，最后通过计算机辅助设计系统（CAD）建立三维模型，再输出快速成型设备可以读取的STL格式．利用ZSW-1型激光快速成型机将STL文件加工成肩胛骨的纸基模型：结果采样后肩胛骨三维重建图像及LOM法制作的肩胛骨三维模型，可以明显地看到骨折和损伤的部位。结论通过观察和研究模型，可以直观的了解病人的病情，从而使外科医生在未进行手术的情况下，可以预先模拟手术过程，找出较好方案，使手术快速准确的完成。