利用 CCD 测定 X 射线增感屏的调制传递函数

Modulation Transfer Function Measurement for X-ray Film and Luminescent Screen Using CCD and Image Processing System

本文论证了利用ＣＣＤ测定Ｘ射线胶片和增感屏调制传递函数的可行性，并给出了一种适用于ＣＣＤ测试数据的处理方法。对于同一种Ｘ射线胶片和增感屏，分别给出了测微光密度计和ＣＣＤ两种测量数据及其误差分析，并且对几种不同的增感屏和胶片性能做了评价。从实际应用中指出利用ＣＣＤ探头测量调制传递函数的优越性。

It is feasible that to use CCD device and image processing system in measurement of the modulation transfer function (MTF) of X-ray film and luminescent screen. A method for processing data captured by CCD is given also. At the same time, the data measured by CCD and APD respectively and their errors are given. For a few kinds of luminescent screens and film, the comparison and evaluation are completed. From the practice of MTF measurement, the advantages of using CCD have been given.