【摘要】 探讨一种适用于多种医学成像系统的威纳频谱测试的简易方法．VC++6．0编程．用AGFA DUOSCAN T2000XL．扫描仪扫描胶片得到密度数据作为离散随机信号．经快速傅里叶变换计算WS。分别对不同的成像系统得到的X线照片按此法处理后．得到的WS与MD-100型显微密度计得到的数据基本相符。该方法能自动进行数据采集和数据处理．具有快速简便的优点。更多还原

【Abstract】 This paper is to approach a simple method for Wiener spectrum measurement in different medial imaging systems. The program written in VC++6.0 can be used to obtain the density datum as discrete signals by scanning films on AGFA DUOSCAN T2000XL scanner, then WS values can be calculated by using fast Fourier transform. The method is applied to different x-ray photographs and the WS values are consistent with the known datum from MD-100 micro-densimeter. The method can make automatic data collection and procedural calculation, showing the characteristics of its simplicity and high speed.更多还原