X射线数字成像图像质量影响因素探讨

Discussion on Influencing Factors of Images Quality in X-ray Digital Imaging

X射线数字成像检测系统是在射线透射工件的层面的同时,通过计算机及数字处理软件直接观察工件内部情况。通过X射线数字成像检测系统采集不同参数下的图像,对管电压、管电流、增益、单帧曝光时间及积分次数与图像灰度值和图像信噪比间的关系进行了统计分析,结果表明增益与图像灰度值基本上成反相关关系,增益几乎对图像信噪比无影响。该实验为图像灰度值和图像信噪比的影响因素的研究提供了有力的数据依据。

The X-ray digital imaging detection system is a system that directly observes the internal situation of the workpiece through computers and digital processing software while transmitting the ray at the level of the workpiece.The X-ray digital imaging detection system collected images under different parameters,and statistically analyzed the grayscale value and signal-to-noise ratio of the images based on tube voltage,tube current,gain,single frame exposure time,and integration times.The gain is basically inversely proportional to the grayscale of the image,while the gain has almost no effect on the signal-to-noise ratio of the image.This experiment provides a strong data basis for the grayscale values and signal-to-noise ratio of images in X-ray detection digital imaging.