DICOM格式医学图像显示方法研究  

Display methods of medical images in DICOM format

作　　者：张光玉[1] 鲁雯[1] 徐龙春[2] 张敏风 邹越[3] 赵文波[3] 张岗[3] 秦健[2] 杨贵华[2] 刘晓寒[1] 闫呈新[2] 朱建忠[2] 车琳琳[1] ZHANG Guangyu LU Wen XU Longchun ZHANG Minfeng ZOU Yue ZHAO Wenbo ZHANG Gang QIN Jian YANG Guihua LIU Xiaoha YAN Chengxin ZHU Jianzhong CHE Linlin(College of Radiology, Taishan Medical University, Tai＇an 271016, China Department of Radiology, Affiliated Hospital of Taishan Medical University, Tai＇an 271000, China Department of Otolaryngology, Affiliated Hospital of Taishan Medical University, Tai＇an 271000, China)

机构地区：[1]泰山医学院放射学院,山东泰安271016 [2]泰山医学院附属医院影像科,山东泰安271000 [3]泰山医学院附属医院耳鼻喉科,山东泰安271000

出　　处：《中国医学物理学杂志》2017年第1期32-38,共7页Chinese Journal of Medical Physics

基　　金：山东省自然科学基金(ZR2015HL095;ZR2014HL093);山东省医药卫生科技发展计划项目(2016WS0608;2016WS0604);泰安市科技局引导计划项目(2015NS2159);泰山医学院博士启动基金(20092007);泰山医学院校级课题(2010ZR018)

摘　　要：研究DICOM格式图像的非线性开窗显示方法,并同目前常用的线性开窗显示方法进行比较。本研究提出了逆线性、指数型、对数型、幂律型、S型、倒S型和基于复杂曲线的伪彩色非线性开窗显示方法,并比较了各种开窗显示方法。仿真结果表明,线性开窗显示适合于较亮背景中的低密度病变细节显示,对低密度病变增强效果较好。逆线性开窗显示刚好相反。对数型开窗显示能够将窗口中较窄范围的低密度值映射到较宽范围的输出密度值来显示,对窗口中的低密度病变增强效果好,而指数型开窗显示相反。幂律型开窗显示根据幂的取值不同分别类似于线性、指数型和对数型开窗显示。S型和倒S型开窗显示对窗口中的中等密度的病变增强效果好。基于复杂曲线的伪彩色显示方法,能够在较宽的窗口中显示较多的病变信息。非线性方法能够显示更多的图像信息,是线性方法的较好补充。The non-linear window display methods of DICOM images were studied and compared with the commonly used linear display methods. The authors analyzed the methods for inverse linear, exponential, logarithmic, power-law, S function,inverse S function and complex curve-based pseudo color window displays, and compared these methods with linear methods of window display. The experimental results demonstrated that linear window display had good performance in displaying the details of low- density lesions against a bright background with a good lesion enhancement effect, while non- linear window display suited for displaying high- density lesions in dark background. The logarithmic window display was capable of mapping low gray-level values in a narrow range in the window of an input image to a wider range of output values, and suited particularly for enhancing low gray- level lesions; the exponential window display method better suited for enhancing high gray- level lesions. The power- law window display method, according to different values of gamma, could be similar to the linear, logarithmic or the exponential displays. The S and inverse S function displays had good enhancement effect for moderate gray-level lesions in the window. The pseudo color window display was capable of displaying more information of the lesions in a wider range of the window to assist in disease diagnosis. The non-linear methods provide more information of the input images and are thus good complimentary techniques for linear display methods.

关 键 词：DICOM格式 医学图像 线性开窗显示 非线性开窗显示 伪彩色开窗显示 

分 类 号：R312[医药卫生—基础医学]