线扩展函数 meaning in Chinese

line spread function

On the basis of increasing the flaw resolution of the x - ray radiographic system , the study is firstly concerned with the analysis made on the influence of such factors as redial sources energy , system noise , optics radiography and scattering on the radiographic system in theory , and the present dissertation looks at the methods for acquiring the radiographic system point sp read function , line spread function and module transfer function ( mtf ) . on the basis of these studies , research the spread properties of the tiny flaw making use of mtf , acquiring the properties of system inspecting sensitivity and resolution , based on the system optimization designing
本文以提高射线成像系统的疵病分辨率为前提，首先在理论上对射线源能量、系统噪声、光学成像、散射等各环节对成像系统的影响进行分析，探讨成像系统的点扩展函数、线扩展函数及其调制传递函数( moduletransferfunction ，简称mtf )获取方法，在此基础上，利用mtf研究微小疵病的扩展特点，从而得到系统的检测灵敏度和分辨率给出关系特性，为系统优化设计提供依据。